4.6
Medium
CVE-2026-56288 GNU patch is vulnerable to a NULL pointer dereference when processing a specially crafted unified-diff patch file
Description
GNU patch is vulnerable to a NULL pointer dereference when processing a specially crafted unified-diff patch file. Improper handling of consecutive end-of-file newline markers can corrupt internal hunk (single block of changes in diff) data structures, causing the application to pass a NULL pointer to fwrite() during patch processing. An attacker can trigger this condition with a malicious patch file, causing the utility to crash and resulting in a denial of service. This issue has been fixed in the commit e6d6a4e021660679d7fc9150f981d4920f722313
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| patch 2.8 | earliest → 2.8.0 | No fix stated |
References
- cert.pl cert.pl
- cgit.git.savannah.gnu.org cgit.git.savannah.gnu.org
- cgit.git.savannah.gnu.org cgit.git.savannah.gnu.org
Timeline
- Published
- Last modified