CVE-2026-74690

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

CVE-2026-74690 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-74690, released September 4, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

8.4

Moderate

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0014

3rd percentile

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.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
linux · Debian 13.5 (trixie)	6.12.115-2	DEBIAN-CVE-2026-74690	Sep 4, 2026
linux · Debian 14	7.1.9-1	DEBIAN-CVE-2026-74690	Sep 4, 2026

Details

Published
August 22, 2026
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74690

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