CVE-2026-85498

unknown

Published 2026-09-15 · Modified —

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

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Description

polkit vulnerability

Predictions

Exploit likelihood

20%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

Mitigation details

Source: Debian Security Tracker · View original ↗ · DFSG

CVE-2026-85498 NameCVE-2026-85498 DescriptionRegression in CVE-2026-4897 fix (polkit read_cookie()) - stack buffer underflow 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…

CVE-2026-85498

Name	CVE-2026-85498
Description	Regression in CVE-2026-4897 fix (polkit read_cookie()) - stack buffer underflow
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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
policykit-1 (PTS)	bookworm	122-3	fixed
	trixie	126-2	fixed
	forky, sid	127-3	vulnerable

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

Package	Type	Release	Fixed Version
policykit-1	source	bookworm	(not affected)
policykit-1	source	trixie	(not affected)
policykit-1	source	(unstable)	(unfixed)

Notes

[trixie] - policykit-1 <not-affected> (Fix for CVE-2026-4897 not applied)
[bookworm] - policykit-1 <not-affected> (Fix for CVE-2026-4897 not applied)
Introduced with: https://github.com/polkit-org/polkit/commit/7e122c8a5120c2aae2d9d44a26796dc18f5b677c
The fix for CVE-2026-4897 introduces th new stack buffer underflow issue.

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Notes

[trixie] - policykit-1 <not-affected> (Fix for CVE-2026-4897 not applied)[bookworm] - policykit-1 <not-affected> (Fix for CVE-2026-4897 not applied)Introduced with: https://github.com/polkit-org/polkit/commit/7e122c8a5120c2aae2d9d44a26796dc18f5b677cThe fix for CVE-2026-4897 introduces th new stack buffer underflow issue.

OS impact

SUSE Affected 1 release

Version	Status	Fixed in
—	Affected	—

Debian Mixed 4 releases

Version	Status	Fixed in
trixie	Fixed	`0`
sid	Affected	—
forky	Affected	—
bookworm	Fixed	`0`

Ubuntu Fixed 3 releases

Version	Status	Fixed in
resolute	Fixed	`127-2ubuntu1.1`
noble	Fixed	`124-2ubuntu1.24.04.4`
jammy	Fixed	`0.105-33ubuntu0.2`

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.