Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

CVE-2026-41991

Gravedad CVSS v4.0:
BAJA
Tipo:
No Disponible / Otro tipo
Fecha de publicación:
29/06/2026
Última modificación:
01/07/2026

Descripción

*** Pendiente de traducción *** GNU gzip contains a vulnerability in the gzexe utility related to insecure temporary file handling. When the mktemp utility is not available in the user’s PATH, gzexe falls back to constructing a temporary file path based solely on the process ID (PID). This predictable filename is created without exclusive access or existence checks.<br /> A local attacker can pre‑create the predicted temporary file path as a symbolic link pointing to an arbitrary file writable by the victim. When gzexe runs, it follows the symlink and overwrites the target file, resulting in a time‑of‑check to time‑of‑use (TOCTOU) condition that allows arbitrary file overwrite.<br /> <br /> This issue has been fixed in the commit 4e6f8b24ab823146ab8776f0b7fe486ab34d4269

Productos y versiones vulnerables

CPE Desde Hasta
cpe:2.3:a:gnu:gzip:*:*:*:*:*:*:*:* 1.14 (incluyendo)