{
  "cveId": "CVE-2026-2673",
  "url": "https://patchblox.com/security/cve/CVE-2026-2673",
  "summary": "CVE-2026-2673 is fixed in 14 products on 1 platform, first by RHSA-2026:19066, released March 13, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "OpenSSL TLS 1.3 server may choose unexpected key agreement group",
  "description": "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.\n\nSecurity Fix(es):\n\n* openssl: OpenSSL: Denial of Service due to NULL pointer dereference in CMS EnvelopedData processing (CVE-2026-28390)\n\nFor 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.",
  "published": "2026-03-13T12:54:00Z",
  "severity": "Moderate",
  "cvss": 6.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
  "cwe": "Selection of Less-Secure Algorithm During Negotiation (\u0027Algorithm Downgrade\u0027)",
  "epss": 0.00453,
  "epssPercentile": 0.39542,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-2673",
  "fixes": [
    {
      "platform": "linux",
      "product": "libssl3t64",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "3.5.3-1ubuntu3.3",
      "fix": "libssl3t64 3.5.3-1ubuntu3.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-libssl3t64-3.5.3-1ubuntu3.3",
      "released": "2026-04-15T18:59:31Z"
    },
    {
      "platform": "linux",
      "product": "libssl3t64",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.5.5-1ubuntu3",
      "fix": "libssl3t64 3.5.5-1ubuntu3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libssl3t64-3.5.5-1ubuntu3",
      "released": "2026-04-06T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "3.5.5-1~deb13u2",
      "fix": "DEBIAN-CVE-2026-2673",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-2673",
      "released": "2026-03-13T19:54:34Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "Debian 14",
      "fixedVersion": "3.6.2-1",
      "fix": "DEBIAN-CVE-2026-2673",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-2673",
      "released": "2026-03-13T19:54:34Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "RHEL 10",
      "fixedVersion": "3.5.5-2.el10_2",
      "fix": "RHSA-2026:19066",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-19066",
      "released": "2026-03-13T13:23:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "RHEL 9",
      "fixedVersion": "1:3.5.5-3.el9_8",
      "fix": "RHSA-2026:22312",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-22312",
      "released": "2026-06-24T14:09:17Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "3.5.3-1ubuntu3.3",
      "fix": "openssl 3.5.3-1ubuntu3.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-openssl-3.5.3-1ubuntu3.3",
      "released": "2026-04-15T18:59:31Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.5.5-1ubuntu3",
      "fix": "openssl 3.5.5-1ubuntu3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-openssl-3.5.5-1ubuntu3",
      "released": "2026-04-06T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "almalinux 10",
      "fixedVersion": "1:3.5.5-2.el10_2.alma.1",
      "fix": "ALSA-2026:19066",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-19066",
      "released": "2026-05-19T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "almalinux 9",
      "fixedVersion": "1:3.5.5-3.el9_8",
      "fix": "ALSA-2026:22312",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-22312",
      "released": "2026-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "amzn 2023",
      "fixedVersion": "1:3.5.5-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1522",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1522",
      "released": "2026-03-30T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl-3",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "3.5.0-160000.8.1",
      "fix": "OPENSUSE-SU-2026:21005-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21005-1",
      "released": "2026-06-22T12:26:17Z"
    },
    {
      "platform": "linux",
      "product": "openssl-3",
      "release": "sles 16.0",
      "fixedVersion": "3.5.0-160000.8.1",
      "fix": "SUSE-SU-2026:22315-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-22315-1",
      "released": "2026-06-22T12:23:46Z"
    },
    {
      "platform": "linux",
      "product": "openssl-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:3.5.5-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1522",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1522",
      "released": "2026-03-30T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "1:3.5.5-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1522",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1522",
      "released": "2026-03-30T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl-devel",
      "release": "RHEL 9",
      "fixedVersion": "1:3.5.5-3.el9_8",
      "fix": "RHSA-2026:22312",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-22312",
      "released": "2026-06-24T14:09:17Z"
    },
    {
      "platform": "linux",
      "product": "openssl-devel",
      "release": "almalinux 10",
      "fixedVersion": "1:3.5.5-2.el10_2.alma.1",
      "fix": "ALSA-2026:19066",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-19066",
      "released": "2026-05-19T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl-devel",
      "release": "almalinux 9",
      "fixedVersion": "1:3.5.5-3.el9_8",
      "fix": "ALSA-2026:22312",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-22312",
      "released": "2026-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:3.5.5-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1522",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1522",
      "released": "2026-03-30T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl-fips-provider-latest",
      "release": "amzn 2023",
      "fixedVersion": "1:3.5.5-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1522",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1522",
      "released": "2026-03-30T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl-fips-provider-latest-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:3.5.5-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1522",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1522",
      "released": "2026-03-30T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl-libs",
      "release": "RHEL 9",
      "fixedVersion": "1:3.5.5-3.el9_8",
      "fix": "RHSA-2026:22312",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-22312",
      "released": "2026-06-24T14:09:17Z"
    },
    {
      "platform": "linux",
      "product": "openssl-libs",
      "release": "almalinux 10",
      "fixedVersion": "1:3.5.5-2.el10_2.alma.1",
      "fix": "ALSA-2026:19066",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-19066",
      "released": "2026-05-19T00:00:00Z"
    },
    {
      "platform": "linux",
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      "fix": "ALSA-2026:22312",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-22312",
      "released": "2026-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl-libs",
      "release": "amzn 2023",
      "fixedVersion": "1:3.5.5-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1522",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1522",
      "released": "2026-03-30T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl-libs-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:3.5.5-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1522",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1522",
      "released": "2026-03-30T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl-perl",
      "release": "RHEL 9",
      "fixedVersion": "1:3.5.5-3.el9_8",
      "fix": "RHSA-2026:22312",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-22312",
      "released": "2026-06-24T14:09:17Z"
    },
    {
      "platform": "linux",
      "product": "openssl-perl",
      "release": "almalinux 10",
      "fixedVersion": "1:3.5.5-2.el10_2.alma.1",
      "fix": "ALSA-2026:19066",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-19066",
      "released": "2026-05-19T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl-perl",
      "release": "almalinux 9",
      "fixedVersion": "1:3.5.5-3.el9_8",
      "fix": "ALSA-2026:22312",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-22312",
      "released": "2026-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl-perl",
      "release": "amzn 2023",
      "fixedVersion": "1:3.5.5-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1522",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1522",
      "released": "2026-03-30T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl-provider-legacy",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "3.5.3-1ubuntu3.3",
      "fix": "openssl-provider-legacy 3.5.3-1ubuntu3.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-openssl-provider-legacy-3.5.3-1ubuntu3.3",
      "released": "2026-04-15T18:59:31Z"
    },
    {
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      "product": "openssl-provider-legacy",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.5.5-1ubuntu3",
      "fix": "openssl-provider-legacy 3.5.5-1ubuntu3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-openssl-provider-legacy-3.5.5-1ubuntu3",
      "released": "2026-04-06T17:00:00Z"
    },
    {
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      "product": "openssl-snapsafe-libs",
      "release": "amzn 2023",
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      "fix": "ALAS2023-2026-1522",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1522",
      "released": "2026-03-30T09:00:00Z"
    },
    {
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      "release": "amzn 2023",
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      "fix": "ALAS2023-2026-1522",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1522",
      "released": "2026-03-30T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}