UnratedRed Hat & Ubuntu Linux
Libidn vulnerability
USN-8521-1 Published Jul 9, 2026
CVE-2026-57053
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
It was discovered that Libidn incorrectly handled certain internationalized domain name strings. An attacker could possibly use this issue to obtain sensitive information or cause a denial of service. Affected Ubuntu releases: 26.04, 24.04, 22.04. CVEs: CVE-2026-57053.
Affected versions
- Ubuntu 26.04
- Ubuntu 24.04
- Ubuntu 22.04
Official advisory · medium-confidence parse· fetched 3 hours ago·verify at source
Mitigation checklist
Recommended fix / mitigation
- Apply available updates: `sudo apt update && sudo apt upgrade` (a standard system update installs the fix).
Official advisory · medium-confidence parse· fetched 3 hours ago·verify at source
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