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.
References7
- git.kernel.org/stable/c/0edd222730a9d7ec98368aaf1d40ee2d8d862e61
- git.kernel.org/stable/c/16b0798024c0e9117e395829ddbbe70981c79d9c
- git.kernel.org/stable/c/3c94d4179bcc19e01b28db634c07a58b28116209
- git.kernel.org/stable/c/49fa26b0df009dc1f420980bd71780e70615b83b
- git.kernel.org/stable/c/7902be374cbfc11c3435e1e87bf22195bf06a558
- git.kernel.org/stable/c/a3d60ae24183eee352c8e87a0ff94c97cd87f156
- git.kernel.org/stable/c/c76c4ee72bfc3824f4f491f18ed0323bf2e2daf9
Metrics
- CVSS 3.1
-
8.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 3 · as of 9 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.