CVE-2026-74719: net/smc: fix qentry overwrite for CONFIRM_LINK and ADD_LINK_CONT in smc_llc_event_handler()

CSIRTS triage

What

The net/smc smc_llc_event_handler function overwrites queue entries for CONFIRM_LINK and ADD_LINK_CONT messages.

Who is affected

Systems running affected Linux kernel versions with SMC protocol support.

Urgency

Low severity (CVSS 3.7); not currently exploited and has limited impact.

Action

Update to a patched Linux kernel version addressing CVE-2026-74719.

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

Details

Source

Microsoft Security Response Center (INTL · vendor-psirt · site)

Severity

low — CVSS 3.7

Published

2026-08-11

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74719

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-2026-747190.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.

Referenced CVEs

Same CVEs, other sources

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

• unknownCVE-2026-74719: In the Linux kernel, the following vulnerability has been resolved: net/smc: fix qentry overwr…nvd

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