Description
In the Linux kernel, the following vulnerability has been resolved: s390/ism: Fix UAF of sba and ieq during ism_dev_exit() A ism interrupt handler can be active in parallel with ism_dev_exit(), accessing freed data structures. No new interrupts will be generated after unregister_ieq(). Drain ongoing interrupt handlers by free_irq(), before freeing ism data structures.
References6
- git.kernel.org/stable/c/58803870ba0841e53b630a1290c6838b091dd128
- git.kernel.org/stable/c/774394d27930ec4cf4cb3eed8ab6a4d20cb2430a
- git.kernel.org/stable/c/950dac9e8c4e3cf68fa8c01f77d3ac3b7369c6a9
- git.kernel.org/stable/c/9c9a59603b2b016424fe2f9a1cb58c8c2f7198f4
- git.kernel.org/stable/c/b1896543ce59c4258625a35cf41e23a9a1f80ea2
- git.kernel.org/stable/c/fc3021284050ecb3bba8a7851340cedcb5037928
Metrics
- CVSS 3.1
-
8.4
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 4 · 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.