Import Source
https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-92151.json
JSON Data
https://api.osv.dev/v1/vulns/AZL-92151
Upstream
  • CVE-2026-56289
Published
2026-07-09T11:16:40Z
Modified
2026-09-02T06:51:55Z
Summary
CVE-2026-56289 affecting package patch for versions less than 2.7.6-10
Details

GNU patch is vulnerable to a denial of service (DoS) due to improper validation of hunk (single block of changes in diff) line offsets in unified-diff input. A specially crafted patch can specify an extremely large line number, causing the application to enter an effectively infinite processing loop while attempting to locate the requested position. This results in excessive CPU consumption and prevents the process from completing. An attacker can trigger this behavior by supplying a malicious patch file, causing the utility to become unresponsive and require manual termination.

This issue has been fixed in the commit faba04ef4f2b410257f76c1b9dc85e350929c4b9

References

Affected packages

Azure Linux:3 / patch

Package

Name
patch
Purl
pkg:rpm/azure-linux/patch

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.7.6-10

Database specific

source
"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-92151.json"