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CVE-2026-80547

s390/vfio_ccw: Implement a crw lock

HIGH
8.8
CVSS Score
Published: August 26, 2026 at 02:37 PM UTC
Updated: October 16, 2026 at 08:17 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH8.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Implement a crw lock Unlike the channel_program struct, which covers synchronous I/O submissions and asynchronous interrupts, the CRW region relies exclusively on asynchronous events coming from hardware. Implement a lock to manage the list of those payloads, to ensure they are read cohesively.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
90%
3f02cb2fd9d2d9e8762102886e3e4b51285797ee5.8
Vendor states this is fixed in 0edd222730a9d7ec98368aaf1d40ee2d8d862e61 (fixed)
Vendor states this is fixed in 16b0798024c0e9117e395829ddbbe70981c79d9c (fixed)
Vendor states this is fixed in 3c94d4179bcc19e01b28db634c07a58b28116209 (fixed)
Vendor states this is fixed in 49fa26b0df009dc1f420980bd71780e70615b83b (fixed)
Vendor states this is fixed in 7902be374cbfc11c3435e1e87bf22195bf06a558 (fixed)
Vendor states this is fixed in a3d60ae24183eee352c8e87a0ff94c97cd87f156 (fixed)
Vendor states this is fixed in c76c4ee72bfc3824f4f491f18ed0323bf2e2daf9 (fixed)
Vendor states this is fixed in 5.15.218 (unaffected)
Vendor states this is fixed in 5.8 (unaffected)
Vendor states this is fixed in 6.1.185 (unaffected)
Vendor states this is fixed in 6.12.105 (unaffected)
Vendor states this is fixed in 6.18.46 (unaffected)
Vendor states this is fixed in 6.6.154 (unaffected)
Vendor states this is fixed in 7.1.10 (unaffected)
Vendor states this is fixed in 7.2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (7)

Source: cverecord
https://git.kernel.org/stable/c/49fa26b0df009dc1f420980bd71780e70615b83b
Source: cverecord
https://git.kernel.org/stable/c/7902be374cbfc11c3435e1e87bf22195bf06a558
Source: cverecord
https://git.kernel.org/stable/c/c76c4ee72bfc3824f4f491f18ed0323bf2e2daf9
Source: cverecord
https://git.kernel.org/stable/c/16b0798024c0e9117e395829ddbbe70981c79d9c
Source: cverecord
https://git.kernel.org/stable/c/3c94d4179bcc19e01b28db634c07a58b28116209
Source: cverecord
https://git.kernel.org/stable/c/0edd222730a9d7ec98368aaf1d40ee2d8d862e61
Source: cverecord
https://git.kernel.org/stable/c/a3d60ae24183eee352c8e87a0ff94c97cd87f156

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHLinux
Vector?

Quick Info

StatusRECEIVED

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