{
  "cveId": "CVE-2026-31789",
  "url": "https://patchblox.com/security/cve/CVE-2026-31789",
  "summary": "CVE-2026-31789 is fixed in 7 products on 1 platform, first by libssl3t64 3.5.5-1ubuntu3, released April 6, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Heap Buffer Overflow in Hexadecimal Conversion",
  "description": "This update for openssl-1_0_0 fixes the following issues:\n\n- CVE-2026-28387: Potential use-after-free in DANE client code (bsc#1260441).\n- CVE-2026-28388: NULL Pointer Dereference When Processing a Delta CRL (bsc#1260442).\n- CVE-2026-28389: Possible NULL dereference when processing CMS KeyAgreeRecipientInfo (bsc#1260443).\n- CVE-2026-31789: Heap buffer overflow in hexadecimal conversion (bsc#1260444).\n- CVE-2026-31790: Incorrect failure handling in RSA KEM RSASVE encapsulation (bsc#1260445).",
  "published": "2026-04-06T17:00:00Z",
  "severity": "Moderate",
  "cvss": 9.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "cwe": "Out-of-bounds Write",
  "epss": 0.00253,
  "epssPercentile": 0.16862,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-31789",
  "fixes": [
    {
      "platform": "linux",
      "product": "libssl3",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "3.0.2-0ubuntu1.23",
      "fix": "libssl3 3.0.2-0ubuntu1.23",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libssl3-3.0.2-0ubuntu1.23",
      "released": "2026-04-15T18:59:27Z"
    },
    {
      "platform": "linux",
      "product": "libssl3t64",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.0.13-0ubuntu3.9",
      "fix": "libssl3t64 3.0.13-0ubuntu3.9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libssl3t64-3.0.13-0ubuntu3.9",
      "released": "2026-04-15T18:59:29Z"
    },
    {
      "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 12.15 (bookworm)",
      "fixedVersion": "3.0.19-1~deb12u2",
      "fix": "DEBIAN-CVE-2026-31789",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-31789",
      "released": "2026-04-07T22:16:21Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "3.5.5-1~deb13u2",
      "fix": "DEBIAN-CVE-2026-31789",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-31789",
      "released": "2026-04-07T22:16:21Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "Debian 14",
      "fixedVersion": "3.6.2-1",
      "fix": "DEBIAN-CVE-2026-31789",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-31789",
      "released": "2026-04-07T22:16:21Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "3.0.2-0ubuntu1.23",
      "fix": "openssl 3.0.2-0ubuntu1.23",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-openssl-3.0.2-0ubuntu1.23",
      "released": "2026-04-15T18:59:27Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.0.13-0ubuntu3.9",
      "fix": "openssl 3.0.13-0ubuntu3.9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-openssl-3.0.13-0ubuntu3.9",
      "released": "2026-04-15T18:59:29Z"
    },
    {
      "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-1_0_0",
      "release": "opensuse-leap 15.6",
      "fixedVersion": "1.0.2p-150000.3.105.1",
      "fix": "SUSE-SU-2026:1291-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-1291-1",
      "released": "2026-04-13T08:09:41Z"
    },
    {
      "platform": "linux",
      "product": "openssl-1_0_0",
      "release": "sles 15.6",
      "fixedVersion": "1.0.2p-150000.3.105.1",
      "fix": "SUSE-SU-2026:1291-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-1291-1",
      "released": "2026-04-13T08:09:41Z"
    },
    {
      "platform": "linux",
      "product": "openssl-1_0_0",
      "release": "sles 15.7",
      "fixedVersion": "1.0.2p-150000.3.105.1",
      "fix": "SUSE-SU-2026:1291-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-1291-1",
      "released": "2026-04-13T08:09:41Z"
    },
    {
      "platform": "linux",
      "product": "openssl-1_1",
      "release": "sles 15.6",
      "fixedVersion": "1.1.1w-150600.5.26.2",
      "fix": "SUSE-SU-2026:1577-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-1577-1",
      "released": "2026-04-23T15:53:50Z"
    },
    {
      "platform": "linux",
      "product": "openssl-1_1",
      "release": "sles 15.7",
      "fixedVersion": "1.1.1w-150700.11.16.1",
      "fix": "SUSE-SU-2026:1386-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-1386-1",
      "released": "2026-04-16T09:17:21Z"
    },
    {
      "platform": "linux",
      "product": "openssl-3",
      "release": "opensuse-leap 15.6",
      "fixedVersion": "3.1.4-150600.5.45.1",
      "fix": "SUSE-SU-2026:1215-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-1215-1",
      "released": "2026-04-08T12:27:58Z"
    },
    {
      "platform": "linux",
      "product": "openssl-3",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "3.5.0-160000.7.1",
      "fix": "OPENSUSE-SU-2026:20525-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-20525-1",
      "released": "2026-04-13T15:48:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl-3",
      "release": "sles 15.6",
      "fixedVersion": "3.1.4-150600.5.45.1",
      "fix": "SUSE-SU-2026:1215-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-1215-1",
      "released": "2026-04-08T12:27:58Z"
    },
    {
      "platform": "linux",
      "product": "openssl-3",
      "release": "sles 15.7",
      "fixedVersion": "3.2.3-150700.5.31.1",
      "fix": "SUSE-SU-2026:1375-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-1375-1",
      "released": "2026-04-15T17:25:45Z"
    },
    {
      "platform": "linux",
      "product": "openssl-3",
      "release": "sles 16.0",
      "fixedVersion": "3.5.0-160000.7.1",
      "fix": "SUSE-SU-2026:21186-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-21186-1",
      "released": "2026-04-13T15:48:01Z"
    },
    {
      "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"
    },
    {
      "platform": "linux",
      "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"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}