CVE catalog

CVE-2025-11964

libpcap affected and fixed versions

[CVE catalog]

On Windows only, if libpcap needs to convert a Windows error message to UTF-8 and the message includes characters that UTF-8 represents using 4 bytes, utf_16le_to_utf_8_truncated() can write data beyond the end of the provided buffer.

Severity
Low · CVSS 1.9CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N
Published
Source
[NVD] · [CVE record]
EPSS
0.12% · Oct 27, 2026

Projects and upstream resources

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": [
    {
      "name": "libpcap",
      "status": "not affected",
      "release": "sid",
      "version": "1.11.0-1"
    },
    {
      "name": "libpcap",
      "status": "not affected",
      "release": "forky",
      "version": "1.11.0-1"
    },
    {
      "name": "libpcap",
      "status": "not affected",
      "release": "trixie",
      "version": "1.10.5-2"
    },
    {
      "name": "libpcap",
      "status": "not affected",
      "release": "bookworm",
      "version": "1.10.3-1"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "libpcap",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "libpcap",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "libpcap",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "libpcap",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "unimportant",
      "fixed_version": "0"
    }
  ],
  "distribution_packages": []
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

  • [libpcap0.8]Unknown

    Source package: [libpcap]

    Details (2)

    • 1.10.3-1 · amd64 · bookworm

      Not affected

      dsa · libpcap · debian · bookworm

    • 1.10.3-1 · arm64 · bookworm

      Not affected

      dsa · libpcap · debian · bookworm

  • [libpcap0.8-dev]Unknown

    Source package: [libpcap]

    Details (2)

    • 1.10.3-1 · amd64 · bookworm

      Not affected

      dsa · libpcap · debian · bookworm

    • 1.10.3-1 · arm64 · bookworm

      Not affected

      dsa · libpcap · debian · bookworm

  • [libpcap-dev]Unknown

    Source package: [libpcap]

    Details (2)

    • 1.10.3-1 · amd64 · bookworm

      Not affected

      dsa · libpcap · debian · bookworm

    • 1.10.3-1 · arm64 · bookworm

      Not affected

      dsa · libpcap · debian · bookworm

Observed:

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]