CVE catalog

CVE-2026-44518

liboqs is a C-language cryptographic library that…

[CVE catalog]

liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. Prior to 0.16.0, an out-of-bounds read has been identified in the XMSS and XMSS^MT stateful signature verification code. When the verification function is called with a signature buffer shorter than the expected signature size for the given parameter set, the implementation does not validate the caller-supplied length and proceeds to read past the end of the buffer. The out-of-bounds bytes are consumed only as input to an internal hash computation and are not returned to the caller, so no oracle exists to leak their contents to an attacker. The primary observable effect is a possible crash (denial of service) of the verifying process if the read crosses into an unmapped memory page. This vulnerability is fixed in 0.16.0.

Severity
Medium · CVSS 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Published
Source
[NVD] · [CVE record]
EPSS
0.30% · Oct 27, 2026

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence
Original provider fields
{
  "package_releases": [],
  "fixed_versions": [],
  "distribution_packages": [
    {
      "name": "liboqs",
      "ecosystem": "cpe",
      "fixed_version": ""
    },
    {
      "name": "liboqs",
      "distro": "suse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.16.0-160000.1.1"
            }
          ]
        }
      ],
      "release": "linux enterprise server 16.0",
      "versions": [],
      "ecosystem": "rpm",
      "fixed_version": "0.16.0-160000.1.1",
      "provider_record_id": "SUSE-SU-2026:23313-1"
    },
    {
      "name": "oqs-provider",
      "distro": "suse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.11.0.32-160000.1.1"
            }
          ]
        }
      ],
      "release": "linux enterprise server 16.0",
      "versions": [],
      "ecosystem": "rpm",
      "fixed_version": "0.11.0.32-160000.1.1",
      "provider_record_id": "SUSE-SU-2026:23313-1"
    },
    {
      "name": "liboqs",
      "distro": "suse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.16.0-160000.1.1"
            }
          ]
        }
      ],
      "release": "linux enterprise server for sap applications 16.0",
      "versions": [],
      "ecosystem": "rpm",
      "fixed_version": "0.16.0-160000.1.1",
      "provider_record_id": "SUSE-SU-2026:23313-1"
    },
    {
      "name": "oqs-provider",
      "distro": "suse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.11.0.32-160000.1.1"
            }
          ]
        }
      ],
      "release": "linux enterprise server for sap applications 16.0",
      "versions": [],
      "ecosystem": "rpm",
      "fixed_version": "0.11.0.32-160000.1.1",
      "provider_record_id": "SUSE-SU-2026:23313-1"
    },
    {
      "name": "liboqs",
      "distro": "opensuse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.16.0-160000.1.1"
            }
          ]
        }
      ],
      "release": "leap 16.0",
      "versions": [],
      "ecosystem": "rpm",
      "fixed_version": "0.16.0-160000.1.1",
      "provider_record_id": "OPENSUSE-SU-2026:21634-1"
    },
    {
      "name": "oqs-provider",
      "distro": "opensuse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.11.0.32-160000.1.1"
            }
          ]
        }
      ],
      "release": "leap 16.0",
      "versions": [],
      "ecosystem": "rpm",
      "fixed_version": "0.11.0.32-160000.1.1",
      "provider_record_id": "OPENSUSE-SU-2026:21634-1"
    },
    {
      "name": "liboqs",
      "distro": "suse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.16.0-150600.3.6.1"
            }
          ]
        }
      ],
      "release": "linux enterprise module for basesystem 15 sp7",
      "versions": [],
      "ecosystem": "rpm",
      "fixed_version": "0.16.0-150600.3.6.1",
      "provider_record_id": "SUSE-SU-2026:3420-1"
    },
    {
      "name": "oqs-provider",
      "distro": "suse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.11.0.32-150600.3.9.1"
            }
          ]
        }
      ],
      "release": "linux enterprise module for basesystem 15 sp7",
      "versions": [],
      "ecosystem": "rpm",
      "fixed_version": "0.11.0.32-150600.3.9.1",
      "provider_record_id": "SUSE-SU-2026:3420-1"
    },
    {
      "name": "liboqs",
      "distro": "suse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.16.0-150600.3.6.1"
            }
          ]
        }
      ],
      "release": "linux enterprise server 15 sp6-ltss",
      "versions": [],
      "ecosystem": "rpm",
      "fixed_version": "0.16.0-150600.3.6.1",
      "provider_record_id": "SUSE-SU-2026:3420-1"
    },
    {
      "name": "oqs-provider",
      "distro": "suse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.11.0.32-150600.3.9.1"
            }
          ]
        }
      ],
      "release": "linux enterprise server 15 sp6-ltss",
      "versions": [],
      "ecosystem": "rpm",
      "fixed_version": "0.11.0.32-150600.3.9.1",
      "provider_record_id": "SUSE-SU-2026:3420-1"
    },
    {
      "name": "liboqs",
      "distro": "suse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.16.0-150600.3.6.1"
            }
          ]
        }
      ],
      "release": "linux enterprise server for sap applications 15 sp6",
      "versions": [],
      "ecosystem": "rpm",
      "fixed_version": "0.16.0-150600.3.6.1",
      "provider_record_id": "SUSE-SU-2026:3420-1"
    },
    {
      "name": "oqs-provider",
      "distro": "suse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.11.0.32-150600.3.9.1"
            }
          ]
        }
      ],
      "release": "linux enterprise server for sap applications 15 sp6",
      "versions": [],
      "ecosystem": "rpm",
      "fixed_version": "0.11.0.32-150600.3.9.1",
      "provider_record_id": "SUSE-SU-2026:3420-1"
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

Observed:

References

[FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]