Source: gzip Version: 1.13-1 Severity: important Tags: security upstream X-Debbugs-Cc: [email protected], Debian Security Team <[email protected]>
Hi, The following vulnerability was published for gzip. CVE-2026-41991[0]: | 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. 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. | This issue has been fixed in the commit | 4e6f8b24ab823146ab8776f0b7fe486ab34d4269 If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2026-41991 https://www.cve.org/CVERecord?id=CVE-2026-41991 [1] https://cgit.git.savannah.gnu.org/cgit/gzip.git/commit/?id=4e6f8b24ab823146ab8776f0b7fe486ab34d4269 Please adjust the affected versions in the BTS as needed. Regards, Salvatore
