CVE-2026-68374: usb: core: sysfs: add lock to bos_descriptors_read()

mediumCVSS 5.5CVE-2026-68374

CSIRTS triage

vendor: Linux product: Linux kernel Information disclosure

What: A race condition exists in usb/core/sysfs bos_descriptors_read() when reading USB BOS descriptors without proper locking.
Who is affected: Linux systems with USB devices connected, reading BOS descriptors via sysfs concurrently.
Urgency: Medium priority; CVSS 5.5 indicates potential information disclosure via race condition.
Action: Apply kernel patch adding lock protection to bos_descriptors_read() function.

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: medium — CVSS 5.5
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68374

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-2026-683740.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-68374	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

highCVE-2026-68374: In the Linux kernel, the following vulnerability has been resolved: usb: core: sysfs: add lock…nvd

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