CVE catalog

CVE-2023-26464

apache-log4j1.2 affected and fixed versions

[CVE catalog]

** UNSUPPORTED WHEN ASSIGNED ** When using the Chainsaw or SocketAppender components with Log4j 1.x on JRE less than 1.7, an attacker that manages to cause a logging entry involving a specially-crafted (ie, deeply nested) hashmap or hashtable (depending on which logging component is in use) to be processed could exhaust the available memory in the virtual machine and achieve Denial of Service when the object is deserialized. This issue affects Apache Log4j before 2. Affected users are recommended to update to Log4j 2.x. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

Severity
High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
Source
[NVD] · [CVE record]
EPSS
1.91% · 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": "apache-log4j1.2",
      "status": "not affected",
      "release": "sid",
      "version": "1.2.17-11"
    },
    {
      "name": "apache-log4j1.2",
      "status": "not affected",
      "release": "forky",
      "version": "1.2.17-11"
    },
    {
      "name": "apache-log4j1.2",
      "status": "not affected",
      "release": "trixie",
      "version": "1.2.17-11"
    },
    {
      "name": "apache-log4j1.2",
      "status": "not affected",
      "release": "bookworm",
      "version": "1.2.17-11"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "apache-log4j1.2",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "apache-log4j1.2",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "apache-log4j1.2",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "apache-log4j1.2",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "unimportant",
      "fixed_version": "0"
    }
  ],
  "distribution_packages": [
    {
      "name": "apache-log4j1.2",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "pro",
      "versions": [
        "1.2.17-6ubuntu1",
        "1.2.17-7ubuntu1",
        "1.2.17-7ubuntu1+esm1",
        "1.2.17-7ubuntu1+esm2"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2023-26464"
    },
    {
      "name": "apache-log4j1.2",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "18.04",
      "versions": [
        "1.2.17-7ubuntu2",
        "1.2.17-8",
        "1.2.17-8+deb10u1build0.18.04.1",
        "1.2.17-8+deb10u1ubuntu0.1",
        "1.2.17-8+deb10u1ubuntu0.2"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2023-26464"
    },
    {
      "name": "apache-log4j1.2",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "20.04",
      "versions": [
        "1.2.17-8",
        "1.2.17-9",
        "1.2.17-9ubuntu0.1",
        "1.2.17-9ubuntu0.2"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2023-26464"
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

  • [liblog4j1.2-java]Unknown

    Source package: [apache-log4j1.2]

    Details (2)

    • 1.2.17-11 · all · bookworm

      Not affected

      dsa · apache-log4j1.2 · debian · bookworm

    • 1.2.17-11 · all · bookworm

      Not affected

      dsa · apache-log4j1.2 · debian · bookworm

  • [liblog4j1.2-java-doc]Unknown

    Source package: [apache-log4j1.2]

    Details (2)

    • 1.2.17-11 · all · bookworm

      Not affected

      dsa · apache-log4j1.2 · debian · bookworm

    • 1.2.17-11 · all · bookworm

      Not affected

      dsa · apache-log4j1.2 · debian · bookworm

Observed:

References

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