CVE-2026-56288
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
- Score
- CVSS 3.1 5.5 Medium
- Status
- Analyzed - cvd@cert.pl
- Published
- 2026-07-09
- Last modified
- 2026-10-25
- Weaknesses
- CWE-476
Affected products
References
- https://cert.pl/en/posts/2026/07/CVE-2026-56288
- https://cgit.git.savannah.gnu.org/cgit/patch.git/
- https://cgit.git.savannah.gnu.org/cgit/patch.git/commit/?id=e6d6a4e021660679d7fc9150f981d4920f722313
