Gzip vulnerabilities
Summary
It was discovered that Gzip's gzexe utility handled temporary files in an insecure manner. When the mktemp utility was not available, gzexe constructed a temporary file path based on the process ID, which could be predicted. A local attacker could possibly use this issue to overwrite arbitrary files via a symlink attack. (CVE-2026-41991) It was discovered that Gzip incorrectly handled certain compressed files. An attacker could possibly use this issue to obtain sensitive information or cause Gzip to crash, resulting in a denial of service. (CVE-2026-41992) Affected Ubuntu releases: 26.04, 24.04, 22.04. CVEs: CVE-2026-41992, CVE-2026-41991.
- Ubuntu 26.04
- Ubuntu 24.04
- Ubuntu 22.04
Official advisory · medium-confidence parse· fetched 2 hours ago·verify at source
Mitigation checklist
- Apply available updates: `sudo apt update && sudo apt upgrade` (a standard system update installs the fix).
Official advisory · medium-confidence parse· fetched 2 hours ago·verify at source
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