{
  "cveId": "CVE-2026-75805",
  "url": "https://patchblox.com/security/cve/CVE-2026-75805",
  "summary": "CVE-2026-75805 is fixed in 15 products on 1 platform, first by libssl3t64 3.5.5-1ubuntu3.6, released September 28, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "NULL Pointer Dereference in CMP Client Revocation Response Handling",
  "description": "Issue summary: A CMP client that requests certificate revocation on the basis of a PKCS#10 CSR may dereference a NULL pointer and terminate abnormally when processing a crafted revocation response.   Impact summary: The NULL pointer dereference happens on a read which  leads to a crash and a Denial of Service for the affected client application.  CWE: CWE-476: NULL-pointer dereference  Description: A CMP client revoking a certificate has to tell the server which certificate to revoke, and may do so by supplying a PKCS#10 CSR instead of the certificate itself or its issuer name and serial number. This is \u0027openssl cmp -cmd rr -csr \u003Cfile\u003E\u0027 on the command line, or OSSL_CMP_exec_RR_ses() with the certificate supplied via OSSL_CMP_CTX_set1_p10CSR() through the API.  A CSR does not contain the issuer name and serial number of the certificate, so the client does not send them. A server may optionally name the certificate it revoked in its response, and the client then compares that name against what it sent. Having sent neither an issuer name nor a serial number, it has nothing to compare against, and a server returning a specially crafted name causes the client to read from a NULL pointer and crash.  The revocation response is checked for valid message protection before the affected code is reached, so an attacker must be a malicious or compromised CMP server, or a man-in-the-middle in possession of the secret used for message protection. Clients that identify the certificate to be revoked by a certificate or by issuer and serial number rather than by a PKCS#10 CSR are not affected.  FIPS impact: no No FIPS modules are affected by this issue, as the CMP protocol implementation is outside the OpenSSL FIPS module boundary.",
  "published": "2026-09-28T17:00:00Z",
  "severity": "Moderate",
  "cvss": 5.3,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
  "cwe": "NULL Pointer Dereference",
  "epss": 0.00324,
  "epssPercentile": 0.2565,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-75805",
  "fixes": [
    {
      "platform": "linux",
      "product": "libssl3",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "3.0.2-0ubuntu1.30",
      "fix": "libssl3 3.0.2-0ubuntu1.30",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libssl3-3.0.2-0ubuntu1.30",
      "released": "2026-09-30T20:39:35Z"
    },
    {
      "platform": "linux",
      "product": "libssl3t64",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.0.13-0ubuntu3.16",
      "fix": "libssl3t64 3.0.13-0ubuntu3.16",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libssl3t64-3.0.13-0ubuntu3.16",
      "released": "2026-09-30T20:39:35Z"
    },
    {
      "platform": "linux",
      "product": "libssl3t64",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.5.5-1ubuntu3.6",
      "fix": "libssl3t64 3.5.5-1ubuntu3.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libssl3t64-3.5.5-1ubuntu3.6",
      "released": "2026-09-28T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "3.0.22-1~deb12u2",
      "fix": "DEBIAN-CVE-2026-75805",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-75805",
      "released": "2026-09-30T20:39:22Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "3.5.7-1~deb13u3",
      "fix": "DEBIAN-CVE-2026-75805",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-75805",
      "released": "2026-09-30T20:39:22Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "Debian 14",
      "fixedVersion": "3.6.5-1",
      "fix": "DEBIAN-CVE-2026-75805",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-75805",
      "released": "2026-09-30T20:39:22Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "3.0.2-0ubuntu1.30",
      "fix": "openssl 3.0.2-0ubuntu1.30",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-openssl-3.0.2-0ubuntu1.30",
      "released": "2026-09-30T20:39:35Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.0.13-0ubuntu3.16",
      "fix": "openssl 3.0.13-0ubuntu3.16",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-openssl-3.0.13-0ubuntu3.16",
      "released": "2026-09-30T20:39:35Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.5.5-1ubuntu3.6",
      "fix": "openssl 3.5.5-1ubuntu3.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-openssl-3.5.5-1ubuntu3.6",
      "released": "2026-09-28T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "amzn 2023",
      "fixedVersion": "1:3.5.8-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-3204",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3204",
      "released": "2026-11-07T01:06:24Z"
    },
    {
      "platform": "linux",
      "product": "openssl-3",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "3.5.0-160000.11.1",
      "fix": "OPENSUSE-SU-2026:22102-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22102-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
      "platform": "linux",
      "product": "openssl-3",
      "release": "sles 15.6",
      "fixedVersion": "3.1.4-150600.5.67.1",
      "fix": "SUSE-SU-2026:4419-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4419-1",
      "released": "2026-10-02T10:23:34Z"
    },
    {
      "platform": "linux",
      "product": "openssl-3",
      "release": "sles 15.7",
      "fixedVersion": "3.5.0-150700.5.53.2",
      "fix": "SUSE-SU-2026:4414-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4414-1",
      "released": "2026-10-02T07:37:31Z"
    },
    {
      "platform": "linux",
      "product": "openssl-3",
      "release": "sles 16.0",
      "fixedVersion": "3.5.0-160000.11.1",
      "fix": "SUSE-SU-2026:24245-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24245-1",
      "released": "2026-11-07T00:45:20Z"
    },
    {
      "platform": "linux",
      "product": "openssl-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:3.5.8-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-3204",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3204",
      "released": "2026-11-07T01:06:24Z"
    },
    {
      "platform": "linux",
      "product": "openssl-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "1:3.5.8-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-3204",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3204",
      "released": "2026-11-07T01:06:24Z"
    },
    {
      "platform": "linux",
      "product": "openssl-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:3.5.8-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-3204",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3204",
      "released": "2026-11-07T01:06:24Z"
    },
    {
      "platform": "linux",
      "product": "openssl-fips-provider-latest",
      "release": "amzn 2023",
      "fixedVersion": "1:3.5.8-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-3204",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3204",
      "released": "2026-11-07T01:06:24Z"
    },
    {
      "platform": "linux",
      "product": "openssl-fips-provider-latest-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:3.5.8-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-3204",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3204",
      "released": "2026-11-07T01:06:24Z"
    },
    {
      "platform": "linux",
      "product": "openssl-libs",
      "release": "amzn 2023",
      "fixedVersion": "1:3.5.8-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-3204",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3204",
      "released": "2026-11-07T01:06:24Z"
    },
    {
      "platform": "linux",
      "product": "openssl-libs-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:3.5.8-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-3204",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3204",
      "released": "2026-11-07T01:06:24Z"
    },
    {
      "platform": "linux",
      "product": "openssl-perl",
      "release": "amzn 2023",
      "fixedVersion": "1:3.5.8-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-3204",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3204",
      "released": "2026-11-07T01:06:24Z"
    },
    {
      "platform": "linux",
      "product": "openssl-provider-legacy",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.5.5-1ubuntu3.6",
      "fix": "openssl-provider-legacy 3.5.5-1ubuntu3.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-openssl-provider-legacy-3.5.5-1ubuntu3.6",
      "released": "2026-09-28T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl-snapsafe-libs",
      "release": "amzn 2023",
      "fixedVersion": "1:3.5.8-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-3204",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3204",
      "released": "2026-11-07T01:06:24Z"
    },
    {
      "platform": "linux",
      "product": "openssl-snapsafe-libs-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:3.5.8-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-3204",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3204",
      "released": "2026-11-07T01:06:24Z"
    }
  ],
  "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"
  }
}