CVE-2026-80549

s390/vfio_ccw: Move cp cleanup out of not operational

CVE-2026-80549 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-80549, released August 27, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

8.2

Moderate

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0014

2nd percentile

In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Move cp cleanup out of not operational The fsm_notoper() routine is called when the device has been lost, and is (by definition) no longer operational. Since this can happen asynchronously from the normal behavior of the driver, the cleanup may happen when holding other locks in the calling sequence (notably, the cio subchannel lock). Push the cleanup of the private->cp resources to a workqueue, where it can be done out from under that lock sequence and a future patch can safely manage the locking requirements.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
linux · Debian 12.15 (bookworm)	6.1.187-1	DEBIAN-CVE-2026-80549	Aug 27, 2026
linux · Debian 13.5 (trixie)	6.12.105-1	DEBIAN-CVE-2026-80549	Aug 27, 2026
linux · Debian 14	7.1.10-1	DEBIAN-CVE-2026-80549	Aug 27, 2026
linux-6.12 · Debian 12.15 (bookworm)	6.12.107-1~deb12u1	DEBIAN-CVE-2026-80549	Aug 27, 2026

Details

Published
August 26, 2026
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80549

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