CVE-2026-64331: usbip: vudc: fix NULL deref in vep_dequeue()

mediumCVSS 5.5CVE-2026-64331

CSIRTS triage

Other

What: This vulnerability addresses a NULL dereference in the vep_dequeue() function.
Who is affected: Deployments using the usbip subsystem.
Urgency: Remediation is advised to avoid potential crashes, although there are no known exploits.
Action: Apply the fix for the NULL dereference in vep_dequeue().

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: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64331

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-2026-643310.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-64331	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownCVE-2026-64331: In the Linux kernel, the following vulnerability has been resolved: usbip: vudc: fix NULL dere…nvd

Recent advisories for usbip

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.

unknownCVE-2026-64331: In the Linux kernel, the following vulnerability has been resolved: usbip: vudc: fix NULL dere…nvd · 2026-07-25
unknownCVE-2026-63905: In the Linux kernel, the following vulnerability has been resolved: usbip: vudc: Fix use after…nvd · 2026-07-19