Bug 2521494 (CVE-2026-74690) - CVE-2026-74690 kernel: s390/ism: Fix UAF of sba and ieq during ism_dev_exit()
Summary: CVE-2026-74690 kernel: s390/ism: Fix UAF of sba and ieq during ism_dev_exit()
Keywords:
Status: NEW
Alias: CVE-2026-74690
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-22 15:48 UTC by OSIDB Bzimport
Modified: 2026-10-26 02:39 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-08-22 15:48:17 UTC 
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.
Comment 1 gkamathe 2026-08-24 12:49:28 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026082233-CVE-2026-74690-0118@gregkh/T
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