s390/ism: Fix UAF of sba and ieq during ism_dev_exit()

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Summary

CVECVE-2026-74690
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-22 16:16:43 UTC
Updated2026-08-22 16:16:43 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 684b89bc39ce4f204b1a2b180f39f2eb36a6b695 fc3021284050ecb3bba8a7851340cedcb5037928 git Not specified
CNA Linux Linux affected 684b89bc39ce4f204b1a2b180f39f2eb36a6b695 774394d27930ec4cf4cb3eed8ab6a4d20cb2430a git Not specified
CNA Linux Linux affected 684b89bc39ce4f204b1a2b180f39f2eb36a6b695 b1896543ce59c4258625a35cf41e23a9a1f80ea2 git Not specified
CNA Linux Linux affected 4.19 Not specified
CNA Linux Linux unaffected 4.19 semver Not specified
CNA Linux Linux unaffected 6.18.45 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.9 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/b1896543ce59c4258625a35cf41e23a9a1f80ea2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/774394d27930ec4cf4cb3eed8ab6a4d20cb2430a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fc3021284050ecb3bba8a7851340cedcb5037928 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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