USN-8733-1: Gzip vulnerabilities
Publication date
7 September 2026
Overview
Several security issues were fixed in Gzip.
Releases
Packages
- gzip - GNU compression utilities
Details
Michał Majchrowicz and Marcin Wyczechowski discovered that Gzip's gzexe
utility created temporary files in an insecure manner when mktemp was
unavailable. A local attacker could possibly use this issue to overwrite
arbitrary files. (CVE-2026-41991)
Elias Hasas, Michał Majchrowicz and Marcin Wyczechowski 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)
Michał Majchrowicz and Marcin Wyczechowski discovered that Gzip's gzexe
utility created temporary files in an insecure manner when mktemp was
unavailable. A local attacker could possibly use this issue to overwrite
arbitrary files. (CVE-2026-41991)
Elias Hasas, Michał Majchrowicz and Marcin Wyczechowski 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)
Update instructions
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 16.04 LTS xenial | gzip – 1.6-4ubuntu1+esm2 | ||
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