CVE-2026-74690 is a vulnerability in Linux Kernel
Published on August 22, 2026
s390/ism: Fix UAF of sba and ieq during ism_dev_exit()
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.
Products Associated with CVE-2026-74690
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Affected Versions
Linux:- Version 684b89bc39ce4f204b1a2b180f39f2eb36a6b695 and below fc3021284050ecb3bba8a7851340cedcb5037928 is affected.
- Version 684b89bc39ce4f204b1a2b180f39f2eb36a6b695 and below 774394d27930ec4cf4cb3eed8ab6a4d20cb2430a is affected.
- Version 684b89bc39ce4f204b1a2b180f39f2eb36a6b695 and below b1896543ce59c4258625a35cf41e23a9a1f80ea2 is affected.
- Version 4.19 is affected.
- Before 4.19 is unaffected.
- Version 6.18.45, <= 6.18.* is unaffected.
- Version 7.1.9, <= 7.1.* is unaffected.
- Version 7.2, <= * is unaffected.