KVM: s390: pci: Fix memory accounting for pinned/unpinned pages
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
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- Confidentiality · integrity · availability
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- Fix status
- Partial Red Hat: 3 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: Fix memory accounting for pinned/unpinned pages The account_mem() and unaccount_mem() functions call get_uid() which increments the reference count of struct user_struct on every invocation. But we don't decrement the count by calling free_uid(). It also accounted/unaccounted the pages against the current->mm. But its possible the unaccount_mem() can be called from a different process context than the one that originally pinned the pages. Let's fix this by storing the pinning process user_struct and mm_struct when accounting for pinned pages, and subsequently free these resources when the pages are unpinned. [[email protected]: Fixed whitespace]
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 6.1.184, 6.6.152, 6.12.104, 6.18.44, 7.1.8, 7.2
Vendor assessments
Red Hat
Red Hat rating: Low. 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 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Not affected: 2 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2026-74514
- 2026-10-03 Alias added: GHSA-rw3p-g3wm-qv8p
References
Other 6
- https://git.kernel.org/stable/c/ad1c2ac7f15b224cf9ab26b593caa9bd1a4be72e
- https://git.kernel.org/stable/c/dc7465a364104526c56b922c9de9dfcc08a7d5f7
- https://git.kernel.org/stable/c/47cfd75d9df7c8f425b0d769328fe43a8a8e606e
- https://git.kernel.org/stable/c/70871b121f81d08879363cb1238a4c85c5c2800c
- https://git.kernel.org/stable/c/e3f732e086e438c52c7400bd2734bb166aa4752c
- https://git.kernel.org/stable/c/36f6999ecde3976731a8bfc0b8e667da6f593069
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- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
Sources
- CVE-2026-74514 · CVE Program
- CVE-2026-74514 · NVD
- FIRST EPSS
- GHSA-rw3p-g3wm-qv8p · GitHub Advisory Database · CC BY 4.0
- CVE-2026-74514 · Red Hat security data · CC BY 4.0
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