CVE-2026-53689

NameCVE-2026-53689
Descriptionlibnfs through 6.0.2 before 55c18ea does not validate a string size, leading to an integer overflow during a connection to a crafted NFS server. This occurs in libnfs_zdr_string in lib/libnfs-zdr.c.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-4689-1
Debian Bugs1139731

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libnfs (PTS)bookworm4.0.0-1vulnerable
bookworm (security)4.0.0-1+deb12u1fixed
trixie5.0.2-1+deb13u1fixed
forky, sid5.0.2-1.1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libnfssourcebullseye4.0.0-1+deb11u1DLA-4689-1
libnfssourcebookworm4.0.0-1+deb12u1DLA-4689-1
libnfssourcetrixie5.0.2-1+deb13u1
libnfssource(unstable)5.0.2-1.11139731

Notes

Fixed by: https://github.com/sahlberg/libnfs/commit/55c18ea33a83d667f79f0ef209c96895795c729f
Search for package or bug name: Reporting problems