UnratedRed Hat & Ubuntu Linux

LIBNFS vulnerability

USN-8464-1 Published Jun 23, 2026

CVE-2026-53689

Affected products & platforms

Red Hat & Ubuntu LinuxUnclassified

Summary

It was discovered that LIBNFS incorrectly handled certain string sizes when connecting to an NFS server. An attacker could use this issue to cause LIBNFS to crash, resulting in a denial of service, or possibly execute arbitrary code. Affected Ubuntu releases: 26.04, 25.10, 24.04, 22.04. CVEs: CVE-2026-53689.

Affected versions

Ubuntu 26.04
Ubuntu 25.10
Ubuntu 24.04
Ubuntu 22.04

Official advisory · medium-confidence parse· fetched 4 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 4 hours ago·verify at source

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