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CVE-2026-46280: lib: test_hmm: evict device pages on file close to avoid use-after-free

mediumCVSS 5.5CVE-2026-46280

CSIRTS triage

vendor: libproduct: libOther
What
The vulnerability involves a use-after-free condition when evicting device pages on file close.
Who is affected
Deployments using the affected library.
Urgency
Remediation is medium urgency due to the potential for exploitation in specific scenarios.
Action
Update to the latest version of the library.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
medium — CVSS 5.5
Published
2026-06-09
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-46280

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-46280coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

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