| Name | CVE-2026-4897 |
| Description | A 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4553-1 |
| Debian Bugs | 1132234 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| policykit-1 (PTS) | bullseye | 0.105-31+deb11u1 | vulnerable |
| bullseye (security) | 0.105-31+deb11u2 | fixed | |
| bookworm | 122-3 | vulnerable | |
| trixie | 126-2 | vulnerable | |
| forky, sid | 127-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| policykit-1 | source | bullseye | 0.105-31+deb11u2 | DLA-4553-1 | ||
| policykit-1 | source | (unstable) | 127-3 | 1132234 |
https://bugzilla.redhat.com/show_bug.cgi?id=2451739
Fixed by: https://github.com/polkit-org/polkit/commit/7e122c8a5120c2aae2d9d44a26796dc18f5b677c
Introduced with (part of the fixes for CVE-2015-4625):
https://github.com/polkit-org/polkit/commit/ea544ffc18405237ccd95d28d7f45afef49aca17 (0.113)