CVE-2026-85498

Polkit: regression in cve-2026-4897 fix (polkit read_cookie()) - stack buffer underflow

CVSS 3.1 3.5 LOWCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-85498

Published

A flaw was found in polkit. When processing input that begins with a null byte, an arithmetic error in the authentication agent helper causes an integer underflow during buffer length calculation, resulting in an out-of-bounds memory read. An attacker capable of supplying crafted input can trigger this flaw, potentially causing an application crash and resulting in a Denial of Service (DoS).

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Affected versions, risk and source history

Exploitation and risk

Source status

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Risk history

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Advisory history

4 saved versions

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6 Nov 2026 21:03:03 UTC