CVE-2026-52941: net/smc: avoid NULL deref of conn->lnk in smc_msg_event tracepoint

mediumCVSS 5.5CVE-2026-52941

CSIRTS triage

Other

What: A NULL dereference can occur in the smc_msg_event tracepoint in the net/smc subsystem.
Who is affected: Deployments using the net/smc subsystem in their networking stack.
Urgency: Remediation is medium urgency due to the medium severity rating, indicating a moderate risk.
Action: Apply the relevant patches to the net/smc subsystem.

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-2026-52941

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.

Low exploitation riskCVE-2026-529410.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-52941	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

high[UPDATE] [high] Linux Kernel: Multiple vulnerabilitiescert-bund
unknownMultiple vulnerabilities in Microsoft Azure Linux (June 29, 2026)cert-fr-avis

Recent advisories for net/smc

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

mediumCVE-2026-53274: net/smc: fix sleep-inside-lock in __smc_setsockopt() causing local DoSmsrc · 2026-06-09
highCVE-2026-46330: Revert "net/smc: Introduce TCP ULP support"msrc · 2026-06-09