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CVE-2026-74345: RDMA/siw: Fix endpoint/socket association handling

criticalCVSS 9.8CVE-2026-74345

CSIRTS triage

vendor: Linuxproduct: Linux kernelRemote code execution
What
RDMA/siw (Software iWARP) driver has faulty endpoint and socket association handling, allowing incorrect socket operations.
Who is affected
Systems using software iWARP RDMA implementations for remote memory access.
Urgency
Critical severity (CVSS 9.8); no known exploitation but socket association bugs can lead to arbitrary memory access or code execution.
Action
Apply kernel patch that corrects endpoint-to-socket association and validation in RDMA/siw.

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

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
critical — CVSS 9.8
Published
2026-08-11
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74345

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-2026-74345coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

Recent advisories for RDMA/siw

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.

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