{ "document": { "aggregate_severity": { "text": "High" }, "category": "csaf_vex", "csaf_version": "2.0", "distribution": { "text": "TuxCare License Agreement", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_alt_nodejs/alpinelinux3.24/vex/2021/cve-2021-4044-els_alt_nodejs-alpinelinux3_24.json" } ], "tracking": { "current_release_date": "2026-07-31T12:46:41Z", "generator": { "date": "2026-07-31T12:46:41Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2021-4044-ELS_ALT_NODEJS-ALPINELINUX3.24", "initial_release_date": "2021-12-14T19:15:00Z", "revision_history": [ { "date": "2021-12-14T19:15:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-07-28T12:26:07Z", "number": "2", "summary": "Official Publication" }, { "date": "2026-07-29T08:27:16Z", 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"name": "alt-nodejs18-18.20.8-r17.x86_64 as a component of Alpine Linux 3.24", "product_id": "Alpine-Linux-3.24:alt-nodejs18-18.20.8-r17.x86_64" }, "product_reference": "alt-nodejs18-18.20.8-r17.x86_64", "relates_to_product_reference": "Alpine-Linux-3.24" }, { "category": "default_component_of", "full_product_name": { "name": "alt-nodejs18-18.20.8-r17.aarch64 as a component of Alpine Linux 3.24", "product_id": "Alpine-Linux-3.24:alt-nodejs18-18.20.8-r17.aarch64" }, "product_reference": "alt-nodejs18-18.20.8-r17.aarch64", "relates_to_product_reference": "Alpine-Linux-3.24" } ] }, "vulnerabilities": [ { "cve": "CVE-2021-4044", "cwe": { "id": "CWE-835", "name": "Loop with Unreachable Exit Condition ('Infinite Loop')" }, "notes": [ { "category": "description", "text": "Internally libssl in OpenSSL calls X509_verify_cert() on the client side to verify a certificate supplied by a server. That function may return a negative return value to indicate an internal error (for example out of memory). Such a negative return value is mishandled by OpenSSL and will cause an IO function (such as SSL_connect() or SSL_do_handshake()) to not indicate success and a subsequent call to SSL_get_error() to return the value SSL_ERROR_WANT_RETRY_VERIFY. This return value is only supposed to be returned by OpenSSL if the application has previously called SSL_CTX_set_cert_verify_callback(). Since most applications do not do this the SSL_ERROR_WANT_RETRY_VERIFY return value from SSL_get_error() will be totally unexpected and applications may not behave correctly as a result. The exact behaviour will depend on the application but it could result in crashes, infinite loops or other similar incorrect responses. This issue is made more serious in combination with a separate bug in OpenSSL 3.0 that will cause X509_verify_cert() to indicate an internal error when processing a certificate chain. This will occur where a certificate does not include the Subject Alternative Name extension but where a Certificate Authority has enforced name constraints. This issue can occur even with valid chains. By combining the two issues an attacker could induce incorrect, application dependent behaviour. Fixed in OpenSSL 3.0.1 (Affected 3.0.0).", "title": "Vulnerability description" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" }, { "category": "other", "text": "TuxCare has assessed that this vulnerability does not impact any currently supported TuxCare products. This evaluation may change as new information becomes available. For additional details regarding this vulnerability and affected products, refer to the provided references.", "title": "Statement" } ], "product_status": { "known_not_affected": [ "Alpine-Linux-3.24:alt-nodejs14-14.21.3-r25.aarch64", "Alpine-Linux-3.24:alt-nodejs14-14.21.3-r25.x86_64", "Alpine-Linux-3.24:alt-nodejs14-dev-14.21.3-r25.aarch64", "Alpine-Linux-3.24:alt-nodejs14-dev-14.21.3-r25.x86_64", "Alpine-Linux-3.24:alt-nodejs14-doc-14.21.3-r25.aarch64", "Alpine-Linux-3.24:alt-nodejs14-doc-14.21.3-r25.x86_64", "Alpine-Linux-3.24:alt-nodejs14-npm-14.21.3-r25.aarch64", "Alpine-Linux-3.24:alt-nodejs14-npm-14.21.3-r25.x86_64", "Alpine-Linux-3.24:alt-nodejs16-16.20.2-r20.aarch64", "Alpine-Linux-3.24:alt-nodejs16-16.20.2-r20.x86_64", "Alpine-Linux-3.24:alt-nodejs16-dev-16.20.2-r20.aarch64", "Alpine-Linux-3.24:alt-nodejs16-dev-16.20.2-r20.x86_64", "Alpine-Linux-3.24:alt-nodejs16-doc-16.20.2-r20.aarch64", "Alpine-Linux-3.24:alt-nodejs16-doc-16.20.2-r20.x86_64", "Alpine-Linux-3.24:alt-nodejs16-npm-16.20.2-r20.aarch64", "Alpine-Linux-3.24:alt-nodejs16-npm-16.20.2-r20.x86_64", "Alpine-Linux-3.24:alt-nodejs18-18.20.8-r14.aarch64", "Alpine-Linux-3.24:alt-nodejs18-18.20.8-r14.x86_64", "Alpine-Linux-3.24:alt-nodejs18-18.20.8-r17.aarch64", "Alpine-Linux-3.24:alt-nodejs18-18.20.8-r17.x86_64", "Alpine-Linux-3.24:alt-nodejs18-dev-18.20.8-r14.aarch64", "Alpine-Linux-3.24:alt-nodejs18-dev-18.20.8-r14.x86_64", "Alpine-Linux-3.24:alt-nodejs18-dev-18.20.8-r17.aarch64", "Alpine-Linux-3.24:alt-nodejs18-dev-18.20.8-r17.x86_64", "Alpine-Linux-3.24:alt-nodejs18-doc-18.20.8-r14.aarch64", "Alpine-Linux-3.24:alt-nodejs18-doc-18.20.8-r14.x86_64", "Alpine-Linux-3.24:alt-nodejs18-doc-18.20.8-r17.aarch64", "Alpine-Linux-3.24:alt-nodejs18-doc-18.20.8-r17.x86_64", "Alpine-Linux-3.24:alt-nodejs18-npm-18.20.8-r14.aarch64", "Alpine-Linux-3.24:alt-nodejs18-npm-18.20.8-r14.x86_64", "Alpine-Linux-3.24:alt-nodejs18-npm-18.20.8-r17.aarch64", "Alpine-Linux-3.24:alt-nodejs18-npm-18.20.8-r17.x86_64", "Alpine-Linux-3.24:alt-nodejs23-23.11.1-r15.aarch64", "Alpine-Linux-3.24:alt-nodejs23-23.11.1-r15.x86_64", "Alpine-Linux-3.24:alt-nodejs23-dev-23.11.1-r15.aarch64", "Alpine-Linux-3.24:alt-nodejs23-dev-23.11.1-r15.x86_64", "Alpine-Linux-3.24:alt-nodejs23-doc-23.11.1-r15.aarch64", "Alpine-Linux-3.24:alt-nodejs23-doc-23.11.1-r15.x86_64", "Alpine-Linux-3.24:alt-nodejs23-npm-23.11.1-r15.aarch64", "Alpine-Linux-3.24:alt-nodejs23-npm-23.11.1-r15.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els-lang/cve/CVE-2021-4044" }, { "category": "external", "summary": "https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=758754966791c537ea95241438454aa86f91f256", "url": "https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=758754966791c537ea95241438454aa86f91f256" }, { "category": "external", "summary": "https://security.netapp.com/advisory/ntap-20211229-0003/", "url": "https://security.netapp.com/advisory/ntap-20211229-0003/" }, { "category": "external", "summary": "https://www.openssl.org/news/secadv/20211214.txt", "url": "https://www.openssl.org/news/secadv/20211214.txt" } ], "release_date": "2021-12-14T19:15:00Z", "scores": [ { "cvss_v2": { "accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0" }, "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1" }, "products": [ "Alpine-Linux-3.24:alt-nodejs14-14.21.3-r25.aarch64", "Alpine-Linux-3.24:alt-nodejs14-14.21.3-r25.x86_64", "Alpine-Linux-3.24:alt-nodejs14-dev-14.21.3-r25.aarch64", "Alpine-Linux-3.24:alt-nodejs14-dev-14.21.3-r25.x86_64", "Alpine-Linux-3.24:alt-nodejs14-doc-14.21.3-r25.aarch64", "Alpine-Linux-3.24:alt-nodejs14-doc-14.21.3-r25.x86_64", "Alpine-Linux-3.24:alt-nodejs14-npm-14.21.3-r25.aarch64", "Alpine-Linux-3.24:alt-nodejs14-npm-14.21.3-r25.x86_64", "Alpine-Linux-3.24:alt-nodejs16-16.20.2-r20.aarch64", "Alpine-Linux-3.24:alt-nodejs16-16.20.2-r20.x86_64", "Alpine-Linux-3.24:alt-nodejs16-dev-16.20.2-r20.aarch64", "Alpine-Linux-3.24:alt-nodejs16-dev-16.20.2-r20.x86_64", "Alpine-Linux-3.24:alt-nodejs16-doc-16.20.2-r20.aarch64", "Alpine-Linux-3.24:alt-nodejs16-doc-16.20.2-r20.x86_64", "Alpine-Linux-3.24:alt-nodejs16-npm-16.20.2-r20.aarch64", "Alpine-Linux-3.24:alt-nodejs16-npm-16.20.2-r20.x86_64", "Alpine-Linux-3.24:alt-nodejs18-18.20.8-r14.aarch64", "Alpine-Linux-3.24:alt-nodejs18-18.20.8-r14.x86_64", "Alpine-Linux-3.24:alt-nodejs18-18.20.8-r17.aarch64", "Alpine-Linux-3.24:alt-nodejs18-18.20.8-r17.x86_64", "Alpine-Linux-3.24:alt-nodejs18-dev-18.20.8-r14.aarch64", "Alpine-Linux-3.24:alt-nodejs18-dev-18.20.8-r14.x86_64", "Alpine-Linux-3.24:alt-nodejs18-dev-18.20.8-r17.aarch64", "Alpine-Linux-3.24:alt-nodejs18-dev-18.20.8-r17.x86_64", "Alpine-Linux-3.24:alt-nodejs18-doc-18.20.8-r14.aarch64", "Alpine-Linux-3.24:alt-nodejs18-doc-18.20.8-r14.x86_64", "Alpine-Linux-3.24:alt-nodejs18-doc-18.20.8-r17.aarch64", "Alpine-Linux-3.24:alt-nodejs18-doc-18.20.8-r17.x86_64", "Alpine-Linux-3.24:alt-nodejs18-npm-18.20.8-r14.aarch64", "Alpine-Linux-3.24:alt-nodejs18-npm-18.20.8-r14.x86_64", "Alpine-Linux-3.24:alt-nodejs18-npm-18.20.8-r17.aarch64", "Alpine-Linux-3.24:alt-nodejs18-npm-18.20.8-r17.x86_64", "Alpine-Linux-3.24:alt-nodejs23-23.11.1-r15.aarch64", "Alpine-Linux-3.24:alt-nodejs23-23.11.1-r15.x86_64", "Alpine-Linux-3.24:alt-nodejs23-dev-23.11.1-r15.aarch64", "Alpine-Linux-3.24:alt-nodejs23-dev-23.11.1-r15.x86_64", "Alpine-Linux-3.24:alt-nodejs23-doc-23.11.1-r15.aarch64", "Alpine-Linux-3.24:alt-nodejs23-doc-23.11.1-r15.x86_64", "Alpine-Linux-3.24:alt-nodejs23-npm-23.11.1-r15.aarch64", "Alpine-Linux-3.24:alt-nodejs23-npm-23.11.1-r15.x86_64" ] } ], "threats": [ { "category": "impact", "details": "Important" }, { "category": "impact", "date": "2026-07-29T07:47:59.307427Z", "details": "Not vulnerable\n\nalt-nodejs18 18.20.8: NOT AFFECTED — not-shipped + fix-present in the linked library: linked Alpine openssl 3.5.7-r0 carries both fix commits; the discarded vendored tree is 3.0.16, itself 15 releases past first-fixed 3.0.1.\n\nPlatform in scope: alpinelinux3.24 (alt-nodejs18 18.20.8). No sibling precedent existed for this CVE at this version anywhere in ELSLANG; assessed from the shipped source and build configuration of alt-nodejs18, not from NVD version ranges.\n\nEvidence\n### What the CVE actually is, and who carries the code\n- CVE-2021-4044 is an **OpenSSL libssl** flaw, not a Node.js flaw. libssl mishandled a negative (internal-error) return from `X509_verify_cert()`, converting it into rwstate `SSL_RETRY_VERIFY`, so `SSL_get_error()` returned `SSL_ERROR_WANT_RETRY_VERIFY` to clients that never called `SSL_CTX_set_cert_verify_callback()` → crash / infinite loop. Vulnerable files: `ssl/ssl_cert.c`, `ssl/statem/statem_clnt.c`, plus `crypto/x509/x509_vfy.c` for the OpenSSL-3.0-only trigger (`has_san_id()` returning `-1` for a cert with no SAN under CA name constraints).\n- **The vulnerable code is in the `openssl` package, never in nodejs.** For alt-nodejs14 on Alpine that package is **alt-openssl11 (1.1.1w)**; for alt-nodejs16/18/23 it is **Alpine's own `openssl` (3.5.7-r0)**. None of the four alt-nodejs packages ships it — each only declares a dependency. This is a purely transitive finding against the runtime.\n- Node's own sources contain none of the affected code: `tar xzOf node-v.tar.gz --wildcards 'node-v/src/*' 'node-v/lib/*' | grep -c 'RETRY_VERIFY'` → **0** for all four (same for `ssl_verify_cert_chain`).\n\n### Build flags relied on (Alpine, the only platforms in scope)\n| Package | APKBUILD flag | line | linked libssl |\n|---|---|---|---|\n| alt-nodejs14 14.21.3 | `--shared-openssl` + `--shared-openssl-includes=/opt/alt/openssl11/include` + `--shared-openssl-libpath=/opt/alt/openssl11/lib`; `depends=\"alt-openssl11-dev\"` (:33); `LDFLAGS … -Wl,-rpath=/opt/alt/openssl11/lib` (:156) | 167–169 | **alt-openssl11 1.1.1w** (`/root/ai-workspace/alt-openssl/APKBUILD:5` `pkgver=1.1.1w`) |\n| alt-nodejs16 16.20.2 | `--shared-openssl`; `depends=\"… openssl\"` (:39), `makedepends=\"… openssl-dev\"` (:51); no libpath override | 172 | **Alpine openssl 3.5.7-r0** |\n| alt-nodejs18 18.20.8 | `--shared-openssl`; `depends=\"… openssl\"` (:33), `openssl-dev` (:45) | 149 | **Alpine openssl 3.5.7-r0** |\n| alt-nodejs23 23.11.1 | `--shared-openssl`; `depends=\"… openssl\"` (:33), `openssl-dev` (:45) | 134 | **Alpine openssl 3.5.7-r0** |\n\nLinkage audit reference: **ELS-2268**. Alpine openssl version read from [pkgs.alpinelinux.org v3.23](https://pkgs.alpinelinux.org/package/v3.23/main/x86_64/openssl) and [v3.24](https://pkgs.alpinelinux.org/package/v3.24/main/x86_64/openssl) — both **3.5.7-r0**, origin `openssl` (→ `libssl3`, `libcrypto3`).\n\n### Bundled vs system (vendored trees are discarded at build time)\n| Package | vendored `deps/openssl` (NOT built) | zlib | nghttp2 / c-ares / llhttp / uv | icu |\n|---|---|---|---|---|", "product_ids": [ "Alpine-Linux-3.24:alt-nodejs18-18.20.8-r14.aarch64", "Alpine-Linux-3.24:alt-nodejs18-18.20.8-r14.x86_64", "Alpine-Linux-3.24:alt-nodejs18-18.20.8-r17.aarch64", "Alpine-Linux-3.24:alt-nodejs18-18.20.8-r17.x86_64", "Alpine-Linux-3.24:alt-nodejs18-dev-18.20.8-r14.aarch64", "Alpine-Linux-3.24:alt-nodejs18-dev-18.20.8-r14.x86_64", "Alpine-Linux-3.24:alt-nodejs18-dev-18.20.8-r17.aarch64", "Alpine-Linux-3.24:alt-nodejs18-dev-18.20.8-r17.x86_64", "Alpine-Linux-3.24:alt-nodejs18-doc-18.20.8-r14.aarch64", "Alpine-Linux-3.24:alt-nodejs18-doc-18.20.8-r14.x86_64", "Alpine-Linux-3.24:alt-nodejs18-doc-18.20.8-r17.aarch64", "Alpine-Linux-3.24:alt-nodejs18-doc-18.20.8-r17.x86_64", "Alpine-Linux-3.24:alt-nodejs18-npm-18.20.8-r14.aarch64", "Alpine-Linux-3.24:alt-nodejs18-npm-18.20.8-r14.x86_64", "Alpine-Linux-3.24:alt-nodejs18-npm-18.20.8-r17.aarch64", "Alpine-Linux-3.24:alt-nodejs18-npm-18.20.8-r17.x86_64" ] }, { "category": "impact", "date": "2026-07-29T07:47:52.318678Z", "details": "Not vulnerable\n\nalt-nodejs14 14.21.3: NOT AFFECTED — not-linked: builds `--shared-openssl` against alt-openssl11 1.1.1w, and the `SSL_RETRY_VERIFY`/`SSL_ERROR_WANT_RETRY_VERIFY` mechanism the CVE abuses does not exist anywhere in the 1.1.1 branch (upstream: \"OpenSSL 1.1.1 and 1.0.2 are not affected\").\n\nPlatform in scope: alpinelinux3.24 (alt-nodejs14 14.21.3). No sibling precedent existed for this CVE at this version anywhere in ELSLANG; assessed from the shipped source and build configuration of alt-nodejs14, not from NVD version ranges.\n\nEvidence\n### What the CVE actually is, and who carries the code\n- CVE-2021-4044 is an **OpenSSL libssl** flaw, not a Node.js flaw. libssl mishandled a negative (internal-error) return from `X509_verify_cert()`, converting it into rwstate `SSL_RETRY_VERIFY`, so `SSL_get_error()` returned `SSL_ERROR_WANT_RETRY_VERIFY` to clients that never called `SSL_CTX_set_cert_verify_callback()` → crash / infinite loop. Vulnerable files: `ssl/ssl_cert.c`, `ssl/statem/statem_clnt.c`, plus `crypto/x509/x509_vfy.c` for the OpenSSL-3.0-only trigger (`has_san_id()` returning `-1` for a cert with no SAN under CA name constraints).\n- **The vulnerable code is in the `openssl` package, never in nodejs.** For alt-nodejs14 on Alpine that package is **alt-openssl11 (1.1.1w)**; for alt-nodejs16/18/23 it is **Alpine's own `openssl` (3.5.7-r0)**. None of the four alt-nodejs packages ships it — each only declares a dependency. This is a purely transitive finding against the runtime.\n- Node's own sources contain none of the affected code: `tar xzOf node-v.tar.gz --wildcards 'node-v/src/*' 'node-v/lib/*' | grep -c 'RETRY_VERIFY'` → **0** for all four (same for `ssl_verify_cert_chain`).\n\n### Build flags relied on (Alpine, the only platforms in scope)\n| Package | APKBUILD flag | line | linked libssl |\n|---|---|---|---|\n| alt-nodejs14 14.21.3 | `--shared-openssl` + `--shared-openssl-includes=/opt/alt/openssl11/include` + `--shared-openssl-libpath=/opt/alt/openssl11/lib`; `depends=\"alt-openssl11-dev\"` (:33); `LDFLAGS … -Wl,-rpath=/opt/alt/openssl11/lib` (:156) | 167–169 | **alt-openssl11 1.1.1w** (`/root/ai-workspace/alt-openssl/APKBUILD:5` `pkgver=1.1.1w`) |\n| alt-nodejs16 16.20.2 | `--shared-openssl`; `depends=\"… openssl\"` (:39), `makedepends=\"… openssl-dev\"` (:51); no libpath override | 172 | **Alpine openssl 3.5.7-r0** |\n| alt-nodejs18 18.20.8 | `--shared-openssl`; `depends=\"… openssl\"` (:33), `openssl-dev` (:45) | 149 | **Alpine openssl 3.5.7-r0** |\n| alt-nodejs23 23.11.1 | `--shared-openssl`; `depends=\"… openssl\"` (:33), `openssl-dev` (:45) | 134 | **Alpine openssl 3.5.7-r0** |\n\nLinkage audit reference: **ELS-2268**. Alpine openssl version read from [pkgs.alpinelinux.org v3.23](https://pkgs.alpinelinux.org/package/v3.23/main/x86_64/openssl) and [v3.24](https://pkgs.alpinelinux.org/package/v3.24/main/x86_64/openssl) — both **3.5.7-r0**, origin `openssl` (→ `libssl3`, `libcrypto3`).\n\n### Bundled vs system (vendored trees are discarded at build time)\n| Package | vendored `deps/openssl` (NOT built) | zlib | nghttp2 / c-ares / llhttp / uv | icu |\n|---|---|---|---|---|", "product_ids": [ "Alpine-Linux-3.24:alt-nodejs14-14.21.3-r25.aarch64", "Alpine-Linux-3.24:alt-nodejs14-14.21.3-r25.x86_64", "Alpine-Linux-3.24:alt-nodejs14-dev-14.21.3-r25.aarch64", "Alpine-Linux-3.24:alt-nodejs14-dev-14.21.3-r25.x86_64", "Alpine-Linux-3.24:alt-nodejs14-doc-14.21.3-r25.aarch64", "Alpine-Linux-3.24:alt-nodejs14-doc-14.21.3-r25.x86_64", "Alpine-Linux-3.24:alt-nodejs14-npm-14.21.3-r25.aarch64", "Alpine-Linux-3.24:alt-nodejs14-npm-14.21.3-r25.x86_64" ] }, { "category": "impact", "date": "2026-07-29T07:47:51.870847Z", "details": "Not vulnerable\n\nalt-nodejs23 23.11.1: NOT AFFECTED — not-shipped + fix-present in the linked library: linked Alpine openssl 3.5.7-r0 carries both fix commits; the discarded vendored tree is 3.0.16, itself 15 releases past first-fixed 3.0.1.\n\nPlatform in scope: alpinelinux3.24 (alt-nodejs23 23.11.1). No sibling precedent existed for this CVE at this version anywhere in ELSLANG; assessed from the shipped source and build configuration of alt-nodejs23, not from NVD version ranges.\n\nEvidence\n### What the CVE actually is, and who carries the code\n- CVE-2021-4044 is an **OpenSSL libssl** flaw, not a Node.js flaw. libssl mishandled a negative (internal-error) return from `X509_verify_cert()`, converting it into rwstate `SSL_RETRY_VERIFY`, so `SSL_get_error()` returned `SSL_ERROR_WANT_RETRY_VERIFY` to clients that never called `SSL_CTX_set_cert_verify_callback()` → crash / infinite loop. Vulnerable files: `ssl/ssl_cert.c`, `ssl/statem/statem_clnt.c`, plus `crypto/x509/x509_vfy.c` for the OpenSSL-3.0-only trigger (`has_san_id()` returning `-1` for a cert with no SAN under CA name constraints).\n- **The vulnerable code is in the `openssl` package, never in nodejs.** For alt-nodejs14 on Alpine that package is **alt-openssl11 (1.1.1w)**; for alt-nodejs16/18/23 it is **Alpine's own `openssl` (3.5.7-r0)**. None of the four alt-nodejs packages ships it — each only declares a dependency. This is a purely transitive finding against the runtime.\n- Node's own sources contain none of the affected code: `tar xzOf node-v.tar.gz --wildcards 'node-v/src/*' 'node-v/lib/*' | grep -c 'RETRY_VERIFY'` → **0** for all four (same for `ssl_verify_cert_chain`).\n\n### Build flags relied on (Alpine, the only platforms in scope)\n| Package | APKBUILD flag | line | linked libssl |\n|---|---|---|---|\n| alt-nodejs14 14.21.3 | `--shared-openssl` + `--shared-openssl-includes=/opt/alt/openssl11/include` + `--shared-openssl-libpath=/opt/alt/openssl11/lib`; `depends=\"alt-openssl11-dev\"` (:33); `LDFLAGS … -Wl,-rpath=/opt/alt/openssl11/lib` (:156) | 167–169 | **alt-openssl11 1.1.1w** (`/root/ai-workspace/alt-openssl/APKBUILD:5` `pkgver=1.1.1w`) |\n| alt-nodejs16 16.20.2 | `--shared-openssl`; `depends=\"… openssl\"` (:39), `makedepends=\"… openssl-dev\"` (:51); no libpath override | 172 | **Alpine openssl 3.5.7-r0** |\n| alt-nodejs18 18.20.8 | `--shared-openssl`; `depends=\"… openssl\"` (:33), `openssl-dev` (:45) | 149 | **Alpine openssl 3.5.7-r0** |\n| alt-nodejs23 23.11.1 | `--shared-openssl`; `depends=\"… openssl\"` (:33), `openssl-dev` (:45) | 134 | **Alpine openssl 3.5.7-r0** |\n\nLinkage audit reference: **ELS-2268**. Alpine openssl version read from [pkgs.alpinelinux.org v3.23](https://pkgs.alpinelinux.org/package/v3.23/main/x86_64/openssl) and [v3.24](https://pkgs.alpinelinux.org/package/v3.24/main/x86_64/openssl) — both **3.5.7-r0**, origin `openssl` (→ `libssl3`, `libcrypto3`).\n\n### Bundled vs system (vendored trees are discarded at build time)\n| Package | vendored `deps/openssl` (NOT built) | zlib | nghttp2 / c-ares / llhttp / uv | icu |\n|---|---|---|---|---|", "product_ids": [ "Alpine-Linux-3.24:alt-nodejs23-23.11.1-r15.aarch64", "Alpine-Linux-3.24:alt-nodejs23-23.11.1-r15.x86_64", "Alpine-Linux-3.24:alt-nodejs23-dev-23.11.1-r15.aarch64", "Alpine-Linux-3.24:alt-nodejs23-dev-23.11.1-r15.x86_64", "Alpine-Linux-3.24:alt-nodejs23-doc-23.11.1-r15.aarch64", "Alpine-Linux-3.24:alt-nodejs23-doc-23.11.1-r15.x86_64", "Alpine-Linux-3.24:alt-nodejs23-npm-23.11.1-r15.aarch64", "Alpine-Linux-3.24:alt-nodejs23-npm-23.11.1-r15.x86_64" ] }, { "category": "impact", "date": "2026-07-29T07:47:44.439564Z", "details": "Not vulnerable\n\nalt-nodejs16 16.20.2: NOT AFFECTED — not-shipped + fix-present in the linked library: flaw lives in libssl, and the linked Alpine openssl 3.5.7-r0 carries both fix commits (`ssl/ssl_cert.c:507-509` guard, `has_san_id()` returning 0).\n\nPlatform in scope: alpinelinux3.24 (alt-nodejs16 16.20.2). No sibling precedent existed for this CVE at this version anywhere in ELSLANG; assessed from the shipped source and build configuration of alt-nodejs16, not from NVD version ranges.\n\nEvidence\n### What the CVE actually is, and who carries the code\n- CVE-2021-4044 is an **OpenSSL libssl** flaw, not a Node.js flaw. libssl mishandled a negative (internal-error) return from `X509_verify_cert()`, converting it into rwstate `SSL_RETRY_VERIFY`, so `SSL_get_error()` returned `SSL_ERROR_WANT_RETRY_VERIFY` to clients that never called `SSL_CTX_set_cert_verify_callback()` → crash / infinite loop. Vulnerable files: `ssl/ssl_cert.c`, `ssl/statem/statem_clnt.c`, plus `crypto/x509/x509_vfy.c` for the OpenSSL-3.0-only trigger (`has_san_id()` returning `-1` for a cert with no SAN under CA name constraints).\n- **The vulnerable code is in the `openssl` package, never in nodejs.** For alt-nodejs14 on Alpine that package is **alt-openssl11 (1.1.1w)**; for alt-nodejs16/18/23 it is **Alpine's own `openssl` (3.5.7-r0)**. None of the four alt-nodejs packages ships it — each only declares a dependency. This is a purely transitive finding against the runtime.\n- Node's own sources contain none of the affected code: `tar xzOf node-v.tar.gz --wildcards 'node-v/src/*' 'node-v/lib/*' | grep -c 'RETRY_VERIFY'` → **0** for all four (same for `ssl_verify_cert_chain`).\n\n### Build flags relied on (Alpine, the only platforms in scope)\n| Package | APKBUILD flag | line | linked libssl |\n|---|---|---|---|\n| alt-nodejs14 14.21.3 | `--shared-openssl` + `--shared-openssl-includes=/opt/alt/openssl11/include` + `--shared-openssl-libpath=/opt/alt/openssl11/lib`; `depends=\"alt-openssl11-dev\"` (:33); `LDFLAGS … -Wl,-rpath=/opt/alt/openssl11/lib` (:156) | 167–169 | **alt-openssl11 1.1.1w** (`/root/ai-workspace/alt-openssl/APKBUILD:5` `pkgver=1.1.1w`) |\n| alt-nodejs16 16.20.2 | `--shared-openssl`; `depends=\"… openssl\"` (:39), `makedepends=\"… openssl-dev\"` (:51); no libpath override | 172 | **Alpine openssl 3.5.7-r0** |\n| alt-nodejs18 18.20.8 | `--shared-openssl`; `depends=\"… openssl\"` (:33), `openssl-dev` (:45) | 149 | **Alpine openssl 3.5.7-r0** |\n| alt-nodejs23 23.11.1 | `--shared-openssl`; `depends=\"… openssl\"` (:33), `openssl-dev` (:45) | 134 | **Alpine openssl 3.5.7-r0** |\n\nLinkage audit reference: **ELS-2268**. Alpine openssl version read from [pkgs.alpinelinux.org v3.23](https://pkgs.alpinelinux.org/package/v3.23/main/x86_64/openssl) and [v3.24](https://pkgs.alpinelinux.org/package/v3.24/main/x86_64/openssl) — both **3.5.7-r0**, origin `openssl` (→ `libssl3`, `libcrypto3`).\n\n### Bundled vs system (vendored trees are discarded at build time)\n| Package | vendored `deps/openssl` (NOT built) | zlib | nghttp2 / c-ares / llhttp / uv | icu |\n|---|---|---|---|---|", "product_ids": [ "Alpine-Linux-3.24:alt-nodejs16-16.20.2-r20.aarch64", "Alpine-Linux-3.24:alt-nodejs16-16.20.2-r20.x86_64", "Alpine-Linux-3.24:alt-nodejs16-dev-16.20.2-r20.aarch64", "Alpine-Linux-3.24:alt-nodejs16-dev-16.20.2-r20.x86_64", "Alpine-Linux-3.24:alt-nodejs16-doc-16.20.2-r20.aarch64", "Alpine-Linux-3.24:alt-nodejs16-doc-16.20.2-r20.x86_64", "Alpine-Linux-3.24:alt-nodejs16-npm-16.20.2-r20.aarch64", "Alpine-Linux-3.24:alt-nodejs16-npm-16.20.2-r20.x86_64" ] } ] } ] }