ubuntu-cve-2026-5435
Vulnerability from osv_ubuntu
Published
2026-04-28 13:19
Modified
2026-05-29 19:09
Summary
Details

The deprecated functions ns_printrrf, ns_printrr and fp_nquery in the GNU C Library version 2.2 and newer fail to enforce the caller-supplied buffer length, and can result in an out-of-bounds write when printing TSIG records.


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            "binary_name": "locales",
            "binary_version": "2.42-0ubuntu3.1"
          },
          {
            "binary_name": "locales-all",
            "binary_version": "2.42-0ubuntu3.1"
          },
          {
            "binary_name": "nscd",
            "binary_version": "2.42-0ubuntu3.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "glibc",
        "purl": "pkg:deb/ubuntu/glibc@2.42-0ubuntu3.1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.41-6ubuntu1",
        "2.41-6ubuntu2",
        "2.41-9ubuntu1",
        "2.42-0ubuntu1",
        "2.42-0ubuntu3",
        "2.42-0ubuntu3.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "glibc-source",
            "binary_version": "2.43-2ubuntu2"
          },
          {
            "binary_name": "libc-bin",
            "binary_version": "2.43-2ubuntu2"
          },
          {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.43-2ubuntu2"
          },
          {
            "binary_name": "libc-devtools",
            "binary_version": "2.43-2ubuntu2"
          },
          {
            "binary_name": "libc-gconv-modules-extra",
            "binary_version": "2.43-2ubuntu2"
          },
          {
            "binary_name": "libc6",
            "binary_version": "2.43-2ubuntu2"
          },
          {
            "binary_name": "libc6-amd64",
            "binary_version": "2.43-2ubuntu2"
          },
          {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.43-2ubuntu2"
          },
          {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.43-2ubuntu2"
          },
          {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.43-2ubuntu2"
          },
          {
            "binary_name": "libc6-i386",
            "binary_version": "2.43-2ubuntu2"
          },
          {
            "binary_name": "libc6-x32",
            "binary_version": "2.43-2ubuntu2"
          },
          {
            "binary_name": "locales",
            "binary_version": "2.43-2ubuntu2"
          },
          {
            "binary_name": "locales-all",
            "binary_version": "2.43-2ubuntu2"
          },
          {
            "binary_name": "nscd",
            "binary_version": "2.43-2ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "glibc",
        "purl": "pkg:deb/ubuntu/glibc@2.43-2ubuntu2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.42-0ubuntu3",
        "2.42-2ubuntu1",
        "2.42-2ubuntu2",
        "2.42-2ubuntu4",
        "2.42-2ubuntu5",
        "2.43-2ubuntu1",
        "2.43-2ubuntu2"
      ]
    }
  ],
  "aliases": [],
  "details": "The deprecated functions ns_printrrf, ns_printrr and fp_nquery in the GNU C Library version 2.2 and newer fail to enforce the caller-supplied buffer length, and can result in an out-of-bounds write when printing TSIG records.",
  "id": "UBUNTU-CVE-2026-5435",
  "modified": "2026-05-29T19:09:24Z",
  "published": "2026-04-28T13:19:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-5435"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-5435"
    },
    {
      "type": "REPORT",
      "url": "https://sourceware.org/git/?p=glibc.git;a=blob_plain;f=advisories/GLIBC-SA-2026-0011"
    },
    {
      "type": "REPORT",
      "url": "https://inbox.sourceware.org/libc-alpha/cover.1777546194.git.fweimer@redhat.com/"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-5435"
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Detection rules are retrieved from Rulezet.

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