s390/ism: Fix UAF of sba and ieq during ism_dev_exit()
Priority LOW 35Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 2 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
EPSS 0.00142 3rd percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.1.191, 6.6.160, 6.12.114 +3Red Hat: 2 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 6.1.191, 6.6.160, 6.12.114, 6.18.45, 7.1.9, 7.2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Not affected: 3 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2026-74690
- 2026-10-03 Alias added: GHSA-f2p8-hwvr-fwmq
- 2026-10-21 Fix available: Linux/Linux@58803870ba0841e53b630a1290c6838b091dd128, Linux/[email protected], Linux/[email protected] +1 · CNA
- 2026-10-21 2 new references · CNA
- 2026-10-26 Affected versions changed · Red Hat
- 2026-10-26 CVSS score added · Red Hat
- 2026-10-30 Fix available: Linux/[email protected], Linux/Linux@9c9a59603b2b016424fe2f9a1cb58c8c2f7198f4 · CNA
- 2026-10-30 1 new reference · CNA
References
Other 6
- https://git.kernel.org/stable/c/9c9a59603b2b016424fe2f9a1cb58c8c2f7198f4
- 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
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Sources
- CVE-2026-74690 · CVE Program
- CVE-2026-74690 · NVD
- FIRST EPSS
- GHSA-f2p8-hwvr-fwmq · GitHub Advisory Database · CC BY 4.0
- CVE-2026-74690 · Red Hat security data · CC BY 4.0
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