CVE-2026-64210: net/mlx5e: xsk: Fix unlocked writing to ICOSQ

highCVSS 7.1CVE-2026-64210

CSIRTS triage

What: There is an issue with unlocked writing to ICOSQ in the mlx5e driver.
Who is affected: Deployments using the mlx5e driver may be affected.
Urgency: Remediation urgency is unclear due to unknown severity and exploitation status.
Action: Monitor for updates regarding this issue.

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

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-2026-64210

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-2026-642100.34% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-64210	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 net/mlx5e

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.

highCVE-2026-64522: In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix eswitch mod…nvd · 2026-07-25
highCVE-2026-64210: In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: xsk: Fix unlock…nvd · 2026-07-24
criticalCVE-2026-64122: In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix use-after-f…nvd · 2026-07-19
mediumCVE-2026-53229: net/mlx5e: xsk: Fix DMA and xdp_frame leak on XDP_TX xmit failuremsrc · 2026-06-09