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CVE-2026-74514

UnknownEPSS 0.17%

Last modified

CVE-2026-74514 is a vulnerability of currently unknown severity. 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. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

Description

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. [borntraeger@linux.ibm.com: Fixed whitespace]

Metrics

EPSS Probability
0.17%

6.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < ad1c2ac7f15b224cf9ab26b593caa9bd1a4be72e; >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < dc7465a364104526c56b922c9de9dfcc08a7d5f7; >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < 47cfd75d9df7c8f425b0d769328fe43a8a8e606e; >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < 70871b121f81d08879363cb1238a4c85c5c2800c; >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < e3f732e086e438c52c7400bd2734bb166aa4752c; >= 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc, < 36f6999ecde3976731a8bfc0b8e667da6f593069
LinuxLinux6.0

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-74514?
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. [borntraeger@linux.ibm.com: Fixed whitespace]
How severe is CVE-2026-74514?
Severity scoring for CVE-2026-74514 is pending analysis. The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2026-74514?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST