# CVE-2025-15467: libssl3t64: Issue summary: Parsing CMS AuthEnvelopedData or EnvelopedData message with maliciously crafted AEAD parameters can tr... CVE-2025-15467 is fixed in 16 products on 1 platform, first by libssl3 3.0.2-0ubuntu1.21, released January 26, 2026. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2025-15467 - Priority: High - CVSS: 9.8 (Medium) - EPSS: 0.7479 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jan 26, 2026 ## Description Issue summary: Parsing CMS AuthEnvelopedData or EnvelopedData message with maliciously crafted AEAD parameters can trigger a stack buffer overflow. Impact summary: A stack buffer overflow may lead to a crash, causing Denial of Service, or potentially remote code execution. When parsing CMS (Auth)EnvelopedData structures that use AEAD ciphers such as AES-GCM, the IV (Initialization Vector) encoded in the ASN.1 parameters is copied into a fixed-size stack buffer without verifying that its length fits the destination. An attacker can supply a crafted CMS message with an oversized IV, causing a stack-based out-of-bounds write before any authentication or tag verification occurs. Applications and services that parse untrusted CMS or PKCS#7 content using AEAD ciphers (e.g., S/MIME (Auth)EnvelopedData with AES-GCM) are vulnerable. Because the overflow occurs prior to authentication, no valid key material is required to trigger it. While exploitability to remote code execution depends on platform and toolchain mitigations, the stack-based write primitive represents a severe risk. The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the CMS implementation is outside the OpenSSL FIPS module boundary. OpenSSL 3.6, 3.5, 3.4, 3.3 and 3.0 are vulnerable to this issue. OpenSSL 1.1.1 and 1.0.2 are not affected by this issue. Impact summary: A stack buffer overflow may lead to a crash, causing Denial of Service, or potentially remote code execution. When parsing CMS AuthEnvelopedData structures that use AEAD ciphers such as AES-GCM, the IV (Initialization Vector) encoded in the ASN.1 parameters is copied into a fixed-size stack buffer without verifying that its length fits the destination. An attacker can supply a crafted CMS message with an oversized IV, causing a stack-based out-of-bounds write before any authentication or tag verification occurs. Applications and services that parse untrusted CMS or PKCS#7 content using AEAD ciphers (e.g., S/MIME AuthEnvelopedData with AES-GCM) are vulnerable. Because the overflow occurs prior to authentication, no valid key material is required to trigger it. While exploitability to remote code execution depends on platform and toolchain mitigations, the stack-based write primitive represents a severe risk. The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the CMS implementation is outside the OpenSSL FIPS module boundary. OpenSSL 3.6, 3.5, 3.4, 3.3 and 3.0 are vulnerable to this issue. OpenSSL 1.1.1 and 1.0.2 are not affected by this issue. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | libssl3 Ubuntu 22.04.1 LTS (jammy) | 3.0.2-0ubuntu1.21 | [libssl3 3.0.2-0ubuntu1.21](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libssl3-3.0.2-0ubuntu1.21.md) | Jan 26, 2026 | | Linux | libssl3t64 Ubuntu 24.04.5 LTS (noble) | 3.0.13-0ubuntu3.7 | [libssl3t64 3.0.13-0ubuntu3.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libssl3t64-3.0.13-0ubuntu3.7.md) | Jan 26, 2026 | | Linux | libssl3t64 Ubuntu 25.10 (questing) | 3.5.3-1ubuntu3 | [libssl3t64 3.5.3-1ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libssl3t64-3.5.3-1ubuntu3.md) | Jan 26, 2026 | | Linux | libssl3t64 Ubuntu 26.04.1 LTS (resolute) | 3.5.5-1ubuntu1 | [libssl3t64 3.5.5-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libssl3t64-3.5.5-1ubuntu1.md) | Jan 26, 2026 | | Linux | openssl Debian 12.15 (bookworm) | 3.0.18-1~deb12u2 | [DSA-6113-1](https://patchblox.com/security/data/fix/linux/dsa-6113-1.md) | Jan 27, 2026 | | Linux | openssl Debian 13.5 (trixie) | 3.5.4-1~deb13u2 | [DSA-6113-1](https://patchblox.com/security/data/fix/linux/dsa-6113-1.md) | Jan 27, 2026 | | Linux | openssl Debian 14 | 3.5.5-1 | [DEBIAN-CVE-2025-15467](https://patchblox.com/security/data/fix/linux/debian-cve-2025-15467.md) | Jan 27, 2026 | | Linux | openssl RHEL 10 | 3.2.2-16.el10_0.6 | [RHSA-2026:1496](https://patchblox.com/security/data/fix/linux/rhsa-2026-1496.md) | Jan 27, 2026 | | Linux | openssl RHEL 9 | 1:3.5.1-7.el9_7 | [RHSA-2026:1473](https://patchblox.com/security/data/fix/linux/rhsa-2026-1473.md) | Jan 28, 2026 | | Linux | openssl Ubuntu 22.04.1 LTS (jammy) | 3.0.2-0ubuntu1.21 | [openssl 3.0.2-0ubuntu1.21](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-openssl-3.0.2-0ubuntu1.21.md) | Jan 26, 2026 | | Linux | openssl Ubuntu 24.04.5 LTS (noble) | 3.0.13-0ubuntu3.7 | [openssl 3.0.13-0ubuntu3.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-openssl-3.0.13-0ubuntu3.7.md) | Jan 26, 2026 | | Linux | openssl Ubuntu 25.10 (questing) | 3.5.3-1ubuntu3 | [openssl 3.5.3-1ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-openssl-3.5.3-1ubuntu3.md) | Jan 26, 2026 | | Linux | openssl Ubuntu 26.04.1 LTS (resolute) | 3.5.5-1ubuntu1 | [openssl 3.5.5-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-openssl-3.5.5-1ubuntu1.md) | Jan 26, 2026 | | Linux | openssl almalinux 10 | 1:3.5.1-7.el10_1.alma.1 | [ALSA-2026:1472](https://patchblox.com/security/data/fix/linux/alsa-2026-1472.md) | Jan 28, 2026 | | Linux | openssl almalinux 9 | 1:3.5.1-7.el9_7 | [ALSA-2026:1473](https://patchblox.com/security/data/fix/linux/alsa-2026-1473.md) | Jan 28, 2026 | | Linux | openssl amzn 2023 | 1:3.2.2-1.amzn2023.0.4 | [ALAS2023-2026-1406](https://patchblox.com/security/data/fix/linux/alas2023-2026-1406.md) | Feb 5, 2026 | | Linux | openssl ol 10 | 1:3.5.1-7.0.1.el10_1 | [ELSA-2026-1472](https://patchblox.com/security/data/fix/linux/elsa-2026-1472.md) | Jan 28, 2026 | | Linux | openssl ol 9 | 1:3.5.1-7.0.1.el9_7 | [ELSA-2026-1473](https://patchblox.com/security/data/fix/linux/elsa-2026-1473.md) | Jan 28, 2026 | | Linux | openssl rocky 10 | 1:3.5.1-7.el10_1 | [RLSA-2026:1472](https://patchblox.com/security/data/fix/linux/rlsa-2026-1472.md) | Jan 30, 2026 | | Linux | openssl rocky 9 | 1:3.5.1-7.el9_7 | [RLSA-2026:1473](https://patchblox.com/security/data/fix/linux/rlsa-2026-1473.md) | Jan 30, 2026 | | Linux | openssl-3 opensuse-leap 15.6 | 3.1.4-150600.5.42.1 | [SUSE-SU-2026:0312-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0312-1.md) | Jan 28, 2026 | | Linux | openssl-3 opensuse-leap 16.0 | 3.5.0-160000.5.1 | [OPENSUSE-SU-2026:20152-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20152-1.md) | Feb 2, 2026 | | Linux | openssl-3 sles 15.6 | 3.1.4-150600.5.42.1 | [SUSE-SU-2026:0312-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0312-1.md) | Jan 28, 2026 | | Linux | openssl-3 sles 15.7 | 3.2.3-150700.5.24.1 | [SUSE-SU-2026:0309-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0309-1.md) | Jan 28, 2026 | | Linux | openssl-3 sles 16.0 | 3.5.0-160000.5.1 | [SUSE-SU-2026:20223-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20223-1.md) | Feb 2, 2026 | | Linux | openssl-3-livepatches sles 15.6 | 0.4-150600.13.11.1 | [SUSE-SU-2026:2411-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2411-1.md) | Jun 16, 2026 | | Linux | openssl-3-livepatches sles 15.7 | 0.4-150700.16.6.1 | [SUSE-SU-2026:2662-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2662-1.md) | Jun 26, 2026 | | Linux | openssl-3-livepatches sles 16.0 | 0.3-160000.1.1 | [SUSE-SU-2026:20607-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20607-1.md) | Feb 18, 2026 | | Linux | openssl-debuginfo amzn 2023 | 1:3.2.2-1.amzn2023.0.4 | [ALAS2023-2026-1406](https://patchblox.com/security/data/fix/linux/alas2023-2026-1406.md) | Feb 5, 2026 | | Linux | openssl-debugsource amzn 2023 | 1:3.2.2-1.amzn2023.0.4 | [ALAS2023-2026-1406](https://patchblox.com/security/data/fix/linux/alas2023-2026-1406.md) | Feb 5, 2026 | | Linux | openssl-devel RHEL 9 | 1:3.5.1-7.el9_7 | [RHSA-2026:1473](https://patchblox.com/security/data/fix/linux/rhsa-2026-1473.md) | Jan 28, 2026 | | Linux | openssl-devel almalinux 10 | 1:3.5.1-7.el10_1.alma.1 | [ALSA-2026:1472](https://patchblox.com/security/data/fix/linux/alsa-2026-1472.md) | Jan 28, 2026 | | Linux | openssl-devel almalinux 9 | 1:3.5.1-7.el9_7 | [ALSA-2026:1473](https://patchblox.com/security/data/fix/linux/alsa-2026-1473.md) | Jan 28, 2026 | | Linux | openssl-devel amzn 2023 | 1:3.2.2-1.amzn2023.0.4 | [ALAS2023-2026-1406](https://patchblox.com/security/data/fix/linux/alas2023-2026-1406.md) | Feb 5, 2026 | | Linux | openssl-devel ol 10 | 1:3.5.1-7.0.1.el10_1 | [ELSA-2026-1472](https://patchblox.com/security/data/fix/linux/elsa-2026-1472.md) | Jan 28, 2026 | | Linux | openssl-devel ol 9 | 1:3.5.1-7.0.1.el9_7 | [ELSA-2026-1473](https://patchblox.com/security/data/fix/linux/elsa-2026-1473.md) | Jan 28, 2026 | | Linux | openssl-fips-provider-latest amzn 2023 | 1:3.2.2-1.amzn2023.0.4 | [ALAS2023-2026-1406](https://patchblox.com/security/data/fix/linux/alas2023-2026-1406.md) | Feb 5, 2026 | | Linux | openssl-fips-provider-latest-debuginfo amzn 2023 | 1:3.2.2-1.amzn2023.0.4 | [ALAS2023-2026-1406](https://patchblox.com/security/data/fix/linux/alas2023-2026-1406.md) | Feb 5, 2026 | | Linux | openssl-libs RHEL 9 | 1:3.5.1-7.el9_7 | [RHSA-2026:1473](https://patchblox.com/security/data/fix/linux/rhsa-2026-1473.md) | Jan 28, 2026 | | Linux | openssl-libs almalinux 10 | 1:3.5.1-7.el10_1.alma.1 | [ALSA-2026:1472](https://patchblox.com/security/data/fix/linux/alsa-2026-1472.md) | Jan 28, 2026 | | Linux | openssl-libs almalinux 9 | 1:3.5.1-7.el9_7 | [ALSA-2026:1473](https://patchblox.com/security/data/fix/linux/alsa-2026-1473.md) | Jan 28, 2026 | | Linux | openssl-libs amzn 2023 | 1:3.2.2-1.amzn2023.0.4 | [ALAS2023-2026-1406](https://patchblox.com/security/data/fix/linux/alas2023-2026-1406.md) | Feb 5, 2026 | | Linux | openssl-libs ol 10 | 1:3.5.1-7.0.1.el10_1 | [ELSA-2026-1472](https://patchblox.com/security/data/fix/linux/elsa-2026-1472.md) | Jan 28, 2026 | | Linux | openssl-libs ol 9 | 1:3.5.1-7.0.1.el9_7 | [ELSA-2026-1473](https://patchblox.com/security/data/fix/linux/elsa-2026-1473.md) | Jan 28, 2026 | | Linux | openssl-libs-debuginfo amzn 2023 | 1:3.2.2-1.amzn2023.0.4 | [ALAS2023-2026-1406](https://patchblox.com/security/data/fix/linux/alas2023-2026-1406.md) | Feb 5, 2026 | | Linux | openssl-perl RHEL 9 | 1:3.5.1-7.el9_7 | [RHSA-2026:1473](https://patchblox.com/security/data/fix/linux/rhsa-2026-1473.md) | Jan 28, 2026 | | Linux | openssl-perl almalinux 10 | 1:3.5.1-7.el10_1.alma.1 | [ALSA-2026:1472](https://patchblox.com/security/data/fix/linux/alsa-2026-1472.md) | Jan 28, 2026 | | Linux | openssl-perl almalinux 9 | 1:3.5.1-7.el9_7 | [ALSA-2026:1473](https://patchblox.com/security/data/fix/linux/alsa-2026-1473.md) | Jan 28, 2026 | | Linux | openssl-perl amzn 2023 | 1:3.2.2-1.amzn2023.0.4 | [ALAS2023-2026-1406](https://patchblox.com/security/data/fix/linux/alas2023-2026-1406.md) | Feb 5, 2026 | | Linux | openssl-perl ol 10 | 1:3.5.1-7.0.1.el10_1 | [ELSA-2026-1472](https://patchblox.com/security/data/fix/linux/elsa-2026-1472.md) | Jan 28, 2026 | | Linux | openssl-perl ol 9 | 1:3.5.1-7.0.1.el9_7 | [ELSA-2026-1473](https://patchblox.com/security/data/fix/linux/elsa-2026-1473.md) | Jan 28, 2026 | | Linux | openssl-provider-legacy Ubuntu 25.10 (questing) | 3.5.3-1ubuntu3 | [openssl-provider-legacy 3.5.3-1ubuntu3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-openssl-provider-legacy-3.5.3-1ubuntu3.md) | Jan 26, 2026 | | Linux | openssl-provider-legacy Ubuntu 26.04.1 LTS (resolute) | 3.5.5-1ubuntu1 | [openssl-provider-legacy 3.5.5-1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-openssl-provider-legacy-3.5.5-1ubuntu1.md) | Jan 26, 2026 | | Linux | openssl-snapsafe-libs amzn 2023 | 1:3.2.2-1.amzn2023.0.4 | [ALAS2023-2026-1406](https://patchblox.com/security/data/fix/linux/alas2023-2026-1406.md) | Feb 5, 2026 | | Linux | openssl-snapsafe-libs-debuginfo amzn 2023 | 1:3.2.2-1.amzn2023.0.4 | [ALAS2023-2026-1406](https://patchblox.com/security/data/fix/linux/alas2023-2026-1406.md) | Feb 5, 2026 | --- Data as of 2026-11-08T06:59:42Z UTC. 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