PT-2026-56776 · Gnu · Patch

Marcin Wyczechowski + 1 · Publicado 2026-07-09 · Atualizado 2026-07-09 · CVE-2026-56289

Mitre

CVSS v4.0

4.6

Média

Vetor base

AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L

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

Correção

Infinite Loop

Enumeração de Fraquezas

CWE-835

Identificadores relacionados

CVE-2026-56289

Produtos afetados

Patch

Referências · 4

• https://cgit.git.savannah.gnu.org/cgit/patch.git · Nota
• https://nvd.nist.gov/vuln/detail/CVE-2026-56289 · Nota de Segurança
• https://cgit.git.savannah.gnu.org/cgit/patch.git/commit/?id=faba04ef4f2b410257f76c1b9dc85e350929c4b9 · Correção
• https://cert.pl/en/posts/2026/07/CVE-2026-56288 · Nota