CVE-2026-64268: RDMA/siw: bound Read Response placement to the RREAD length

highCVSS 7.1CVE-2026-64268

CSIRTS triage

vendor: null product: nullOther

What: The RDMA/siw driver has a bound Read Response placement issue related to RREAD length.
Who is affected: Deployments using the RDMA/siw driver are affected.
Urgency: Remediation urgency is unclear due to unknown severity and no exploitation reported.
Action: Monitor for updates regarding this issue.

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: high — CVSS 7.1
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64268

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-2026-642680.69% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 49% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-64268	coverage & exploitation status	NVD · 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.

criticalCVE-2026-64268: In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: bound Read Respo…nvd · 2026-07-25
criticalCVE-2026-64102: In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: Reject MPA FPDU …nvd · 2026-07-19