High 8.4Published Aug 22, 2026

CVE-2026-74690s390/ism: Fix UAF of sba and ieq during ism_dev_exit()

Updated under an hour ago (Oct 27, 2026, 8:40 AM ET)

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Exploited in the last 30 days

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.

CVSS: 8.4 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 684b89bc39ce4f204b1a2b180f39f2eb36a6b695 before 950dac9e8c4e3cf68fa8c01f77d3ac3b7369c6a9; from 684b89bc39ce4f204b1a2b180f39f2eb36a6b695 before 58803870ba0841e53b630a1290c6838b091dd128; from 684b89bc39ce4f204b1a2b180f39f2eb36a6b695 before fc3021284050ecb3bba8a7851340cedcb5037928; from 684b89bc39ce4f204b1a2b180f39f2eb36a6b695 before 774394d27930ec4cf4cb3eed8ab6a4d20cb2430a; from 684b89bc39ce4f204b1a2b180f39f2eb36a6b695 before b1896543ce59c4258625a35cf41e23a9a1f80ea2	CNA record

References

References

https://git.kernel.org/stable/c/950dac9e8c4e3cf68fa8c01f77d3ac3b7369c6a9
https://git.kernel.org/stable/c/58803870ba0841e53b630a1290c6838b091dd128
https://git.kernel.org/stable/c/fc3021284050ecb3bba8a7851340cedcb5037928
https://git.kernel.org/stable/c/774394d27930ec4cf4cb3eed8ab6a4d20cb2430a
https://git.kernel.org/stable/c/b1896543ce59c4258625a35cf41e23a9a1f80ea2

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.