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CVE-2026-53274: net/smc: fix sleep-inside-lock in __smc_setsockopt() causing local DoS

mediumCVSS 5.5CVE-2026-53274

CSIRTS triage

Denial of service
What
The net/smc subsystem has a sleep-inside-lock issue in the __smc_setsockopt function that can cause local DoS.
Who is affected
Users of the net/smc functionality are affected.
Urgency
Medium urgency as it could lead to local denial of service, but no active exploitation is reported.
Action
Monitor for updates and apply patches when available.

AI-assisted analysis generated from the source advisory — verify against the original.

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-2026-53274

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-2026-53274coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

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