CVE-2026-74682: ALSA: usb-audio: fix OOB write on Type II inbound URBs

mediumCVSS 5.9CVE-2026-74682

CSIRTS triage

vendor: Linux product: Linux kernel Memory corruption

What: Out-of-bounds write in USB audio driver when handling Type II inbound URBs due to insufficient bounds checking.
Who is affected: Systems with USB audio devices (Type II format) connected and in active use for audio streaming.
Urgency: Medium severity (CVSS 5.9) with no current exploitation; kernel memory corruption risk.
Action: Apply Linux kernel patch to add bounds validation in ALSA USB audio driver for Type II URB handling.

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 5.9
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74682

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-2026-746820.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-74682	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownCVE-2026-74682: In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: fix OOB w…nvd

Recent advisories for ALSA

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-2026-74682: In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: fix OOB w…nvd · 2026-08-22
unknownCVE-2026-74642: In the Linux kernel, the following vulnerability has been resolved: ALSA: usb: Fix UAF at dela…nvd · 2026-08-22
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