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From: Salvatore Bonaccorso <carnil@debian.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: policykit-1: CVE-2026-4897
Message-ID: <177479941004.2043866.3024901168728259940.reportbug@eldamar.lan>
X-Mailer: reportbug 13.2.0
Date: Sun, 29 Mar 2026 17:50:10 +0200
Delivered-To: submit@bugs.debian.org

Source: polkitd
Version: 127-2
Severity: important
Tags: security upstream
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for policykit-1.

CVE-2026-4897[0]:
| 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-4897
    https://www.cve.org/CVERecord?id=CVE-2026-4897
[1] https://bugzilla.redhat.com/show_bug.cgi?id=2451739
[2] https://github.com/polkit-org/polkit/commit/7e122c8a5120c2aae2d9d44a26796dc18f5b677c

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore
]