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No exploitation reportedFix available

CVE-2021-45261

No exploitation reported by the sources we read.

  • Published2021-12-22
  • WeaknessCWE-763

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An Invalid Pointer vulnerability exists in GNU patch 2.7 via the another_hunk function, which causes a Denial of Service.

Timeline

dates in UTC
  1. 2021-12-2218:15CVE publishedNVD

Versions per branch

NVD
Gnu patch
BranchAffectedFixed in
2.7= 2.7no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • patchUbuntu:Pro:14.04:LTSall versions · no fixed version listed
  • patchUbuntu:26.10all versions · no fixed version listed
  • patchUbuntu:26.04:LTSall versions · no fixed version listed
  • patchUbuntu:25.10all versions · no fixed version listed
  • patchUbuntu:24.04:LTSall versions · no fixed version listed
  • patchUbuntu:22.04:LTSall versions · no fixed version listed
  • patchUbuntu:20.04:LTSall versions · no fixed version listed
  • patchUbuntu:18.04:LTSall versions · no fixed version listed

19 more package ranges on OSV.dev

Vendor advisories

  • CVE-2021-45261 Red Hat Product Security5 known affected

    patch: Invalid Pointer via another_hunk function

    patch as a component of Red Hat Enterprise Linux 7 · patch.src as a component of Red Hat Enterprise Linux 7 · patch as a component of Red Hat Enterprise Linux 8 · +2 more

Full record on NVD

Fix

  1. No fix available, says the vendor Red Hat Product Security CVE-2021-45261 · 3 productsFix deferred
  2. No fix planned, says the vendor Red Hat Product Security CVE-2021-45261 · 2 productsOut of support scope

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Published
2021-12-22
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-5wqw-cqhv-q8cv

Frequently asked questions

What is CVE-2021-45261?

An Invalid Pointer vulnerability exists in GNU patch 2.7 via the another_hunk function, which causes a Denial of Service.

Is CVE-2021-45261 actively exploited?

Active exploitation of CVE-2021-45261 has not been confirmed. Its EPSS score was 0.8% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-45261?

CVE-2021-45261 has a CVSS v3 base score of 5.5 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

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Sources for this record