CVE-2026-4897

NameCVE-2026-4897
DescriptionA flaw was found in polkit. A local user can exploit this by providing a specially crafted, excessively long input to the `polkit-agent-helper-1` setuid binary via standard input (stdin). This unbounded input can lead to an out-of-memory (OOM) condition, resulting in a Denial of Service (DoS) for the system.
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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
policykit-1 (PTS)bullseye (security), bullseye0.105-31+deb11u1vulnerable
bookworm122-3vulnerable
trixie126-2vulnerable
forky, sid127-2vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
policykit-1source(unstable)(unfixed)

Notes

https://bugzilla.redhat.com/show_bug.cgi?id=2451739
check upstream details

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