openssl: OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as...
CVE-2025-66199 is fixed in 14 products on 1 platform, first by libssl3t64 3.5.3-1ubuntu3, released January 26, 2026. It is not reported as exploited. Patch Radar priority: High.
OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library. Security Fix(es): * openssl: OpenSSL: Arbitrary code execution or denial of service through crafted PKCS#12 file (CVE-2025-11187) * openssl: OpenSSL: Remote code execution or Denial of Service via oversized Initialization Vector in CMS parsing (CVE-2025-15467) * openssl: OpenSSL: Denial of Service via NULL pointer dereference in QUIC protocol handling (CVE-2025-15468) * openssl: OpenSSL: Data integrity bypass in `openssl dgst` command due to silent truncation (CVE-2025-15469) * openssl: OpenSSL: Denial of Service due to excessive memory allocation in TLS 1.3 certificate compression (CVE-2025-66199) * openssl: OpenSSL: Denial of Service due to out-of-bounds write in BIO filter (CVE-2025-68160) * openssl: OpenSSL: Information disclosure and data tampering via specific low-level OCB encryption/decryption calls (CVE-2025-69418) * openssl: OpenSSL: Arbitrary code execution due to out-of-bounds write in PKCS#12 processing (CVE-2025-69419) * openssl: OpenSSL: Denial of Service via malformed PKCS#12 file processing (CVE-2025-69421) * openssl: OpenSSL: Denial of Service via malformed TimeStamp Response (CVE-2025-69420) * openssl: OpenSSL: Denial of Service due to type confusion in PKCS#12 file processing (CVE-2026-22795) * openssl: OpenSSL: Denial of Service via type confusion in PKCS#7 signature verification (CVE-2026-22796) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libssl3t64 · Ubuntu 25.10 (questing) | 3.5.3-1ubuntu3 | libssl3t64 3.5.3-1ubuntu3 | Jan 26, 2026 |
| libssl3t64 · Ubuntu 26.04.1 LTS (resolute) | 3.5.5-1ubuntu1 | libssl3t64 3.5.5-1ubuntu1 | Jan 26, 2026 |
| openssl · Debian 13.5 (trixie) | 3.5.4-1~deb13u2 | DEBIAN-CVE-2025-66199 | Jan 27, 2026 |
| openssl · Debian 14 | 3.5.5-1 | DEBIAN-CVE-2025-66199 | Jan 27, 2026 |
| openssl · RHEL 10 | 3.5.1-7.el10_1 | RHSA-2026:1472 | Jan 27, 2026 |
| openssl · RHEL 9 | 1:3.5.1-7.el9_7 | RHSA-2026:1473 | Jan 28, 2026 |
| openssl · Ubuntu 25.10 (questing) | 3.5.3-1ubuntu3 | openssl 3.5.3-1ubuntu3 | Jan 26, 2026 |
| openssl · Ubuntu 26.04.1 LTS (resolute) | 3.5.5-1ubuntu1 | openssl 3.5.5-1ubuntu1 | Jan 26, 2026 |
| openssl · almalinux 10 | 1:3.5.1-7.el10_1.alma.1 | ALSA-2026:1472 | Jan 28, 2026 |
| openssl · almalinux 9 | 1:3.5.1-7.el9_7 | ALSA-2026:1473 | Jan 28, 2026 |
| openssl · amzn 2023 | 1:3.2.2-1.amzn2023.0.5 | ALAS2023-2026-1434 | Feb 16, 2026 |
| openssl · ol 10 | 1:3.5.1-7.0.1.el10_1 | ELSA-2026-1472 | Jan 28, 2026 |
| openssl · ol 9 | 1:3.5.1-7.0.1.el9_7 | ELSA-2026-1473 | Jan 28, 2026 |
| openssl · rocky 10 | 1:3.5.1-7.el10_1 | RLSA-2026:1472 | Jan 30, 2026 |
| openssl · rocky 9 | 1:3.5.1-7.el9_7 | RLSA-2026:1473 | Jan 30, 2026 |
| openssl-3 · opensuse-leap 16.0 | 3.5.0-160000.5.1 | OPENSUSE-SU-2026:20152-1 | Feb 2, 2026 |
| openssl-3 · sles 16.0 | 3.5.0-160000.5.1 | SUSE-SU-2026:20223-1 | Feb 2, 2026 |
| openssl-debuginfo · amzn 2023 | 1:3.2.2-1.amzn2023.0.5 | ALAS2023-2026-1434 | Feb 16, 2026 |
| openssl-debugsource · amzn 2023 | 1:3.2.2-1.amzn2023.0.5 | ALAS2023-2026-1434 | Feb 16, 2026 |
| openssl-devel · RHEL 9 | 1:3.5.1-7.el9_7 | RHSA-2026:1473 | Jan 28, 2026 |
| openssl-devel · almalinux 10 | 1:3.5.1-7.el10_1.alma.1 | ALSA-2026:1472 | Jan 28, 2026 |
| openssl-devel · almalinux 9 | 1:3.5.1-7.el9_7 | ALSA-2026:1473 | Jan 28, 2026 |
| openssl-devel · amzn 2023 | 1:3.2.2-1.amzn2023.0.5 | ALAS2023-2026-1434 | Feb 16, 2026 |
| openssl-devel · ol 10 | 1:3.5.1-7.0.1.el10_1 | ELSA-2026-1472 | Jan 28, 2026 |
| openssl-devel · ol 9 | 1:3.5.1-7.0.1.el9_7 | ELSA-2026-1473 | Jan 28, 2026 |
| openssl-fips-provider-latest · amzn 2023 | 1:3.2.2-1.amzn2023.0.5 | ALAS2023-2026-1434 | Feb 16, 2026 |
| openssl-fips-provider-latest-debuginfo · amzn 2023 | 1:3.2.2-1.amzn2023.0.5 | ALAS2023-2026-1434 | Feb 16, 2026 |
| openssl-libs · RHEL 9 | 1:3.5.1-7.el9_7 | RHSA-2026:1473 | Jan 28, 2026 |
| openssl-libs · almalinux 10 | 1:3.5.1-7.el10_1.alma.1 | ALSA-2026:1472 | Jan 28, 2026 |
| openssl-libs · almalinux 9 | 1:3.5.1-7.el9_7 | ALSA-2026:1473 | Jan 28, 2026 |
| openssl-libs · amzn 2023 | 1:3.2.2-1.amzn2023.0.5 | ALAS2023-2026-1434 | Feb 16, 2026 |
| openssl-libs · ol 10 | 1:3.5.1-7.0.1.el10_1 | ELSA-2026-1472 | Jan 28, 2026 |
| openssl-libs · ol 9 | 1:3.5.1-7.0.1.el9_7 | ELSA-2026-1473 | Jan 28, 2026 |
| openssl-libs-debuginfo · amzn 2023 | 1:3.2.2-1.amzn2023.0.5 | ALAS2023-2026-1434 | Feb 16, 2026 |
| openssl-perl · RHEL 9 | 1:3.5.1-7.el9_7 | RHSA-2026:1473 | Jan 28, 2026 |
| openssl-perl · almalinux 10 | 1:3.5.1-7.el10_1.alma.1 | ALSA-2026:1472 | Jan 28, 2026 |
| openssl-perl · almalinux 9 | 1:3.5.1-7.el9_7 | ALSA-2026:1473 | Jan 28, 2026 |
| openssl-perl · amzn 2023 | 1:3.2.2-1.amzn2023.0.5 | ALAS2023-2026-1434 | Feb 16, 2026 |
| openssl-perl · ol 10 | 1:3.5.1-7.0.1.el10_1 | ELSA-2026-1472 | Jan 28, 2026 |
| openssl-perl · ol 9 | 1:3.5.1-7.0.1.el9_7 | ELSA-2026-1473 | Jan 28, 2026 |
| openssl-provider-legacy · Ubuntu 25.10 (questing) | 3.5.3-1ubuntu3 | openssl-provider-legacy 3.5.3-1ubuntu3 | Jan 26, 2026 |
| openssl-provider-legacy · Ubuntu 26.04.1 LTS (resolute) | 3.5.5-1ubuntu1 | openssl-provider-legacy 3.5.5-1ubuntu1 | Jan 26, 2026 |
| openssl-snapsafe-libs · amzn 2023 | 1:3.2.2-1.amzn2023.0.5 | ALAS2023-2026-1434 | Feb 16, 2026 |
| openssl-snapsafe-libs-debuginfo · amzn 2023 | 1:3.2.2-1.amzn2023.0.5 | ALAS2023-2026-1434 | Feb 16, 2026 |
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