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  4. CVE 2026 74690 s390ism fix uaf of sba and ieq during ismdevexit
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Back to active CVEs
High · CVSS 8.4CVE-2026-74690

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

Answer in brief

CVE-2026-74690 records a High severity (CVSS 8.4) vulnerability in s390/ism: Fix UAF of sba and ieq during ism_dev_exit(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 22, 2026Updated Aug 25, 2026Source checked Oct 7, 2026First seen by HOL Aug 22, 2026Material review Aug 25, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.4
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 8.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=684b89bc39ce4f204b1a2b180f39f2eb36a6b695 <fc3021284050ecb3bba8a7851340cedcb5037928 || >=684b89bc39ce4f204b1a2b180f39f2eb36a6b695 <774394d27930ec4cf4cb3eed8ab6a4d20cb2430a || >=684b89bc39ce4f204b1a2b180f39f2eb36a6b695 <b1896543ce59c4258625a35cf41e23a9a1f80ea2fc3021284050ecb3bba8a7851340cedcb5037928, 774394d27930ec4cf4cb3eed8ab6a4d20cb2430a, b1896543ce59c4258625a35cf41e23a9a1f80ea2
Linux/Linuxgeneric4.19Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to fc3021284050ecb3bba8a7851340cedcb5037928 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Aug 22, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Aug 25, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 22, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

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Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Oct 7, 2026
References
3 linked sources
Open source record