CVE-2026-74641: ALSA: usx2y: bound the hwdep mmap fault offset

highCVSS 7.8CVE-2026-74641

CSIRTS triage

vendor: Linux product: Linux kernel Memory corruption

What: Missing bounds checking on hwdep mmap fault offset in the ALSA usx2y audio driver allows out-of-bounds memory access.
Who is affected: Systems running vulnerable Linux kernel versions with ALSA usx2y USB audio device support enabled.
Urgency: High priority; not currently exploited but unbounded memory access enables privilege escalation and system compromise.
Action: Apply kernel patch validating hwdep mmap offset boundaries in sound/usb/usx2y or update to patched kernel version.

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

⚡ Watch Linux kernel

Get an email when a new Linux kernel advisory drops — max one per day, one-click unsubscribe.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.8
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74641

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-2026-746410.18% 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-2026-74641	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

highCVE-2026-74641: In the Linux kernel, the following vulnerability has been resolved: ALSA: usx2y: bound the hwd…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
highCVE-2026-74641: In the Linux kernel, the following vulnerability has been resolved: ALSA: usx2y: bound the hwd…nvd · 2026-08-22
highCVE-2026-74640: In the Linux kernel, the following vulnerability has been resolved: ALSA: FCP: fix OOB write i…nvd · 2026-08-22
unknownCVE-2026-74639: In the Linux kernel, the following vulnerability has been resolved: ALSA: us144mkii: re-anchor…nvd · 2026-08-22
unknownCVE-2026-74505: In the Linux kernel, the following vulnerability has been resolved: ALSA: 6fire: Fix UAF at er…nvd · 2026-08-15