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CVE-2026-46090: ALSA: aloop: Fix peer runtime UAF during format-change stop

highCVSS 7CVE-2026-46090

CSIRTS triage

vendor: Linuxproduct: ALSAMemory corruption
What
The ALSA aloop driver has a use-after-free vulnerability in the peer runtime during format changes.
Who is affected
Systems running vulnerable Linux kernels with ALSA aloop driver enabled.
Urgency
High severity (CVSS 7.0) with potential for privilege escalation or denial of service depending on exploitation.
Action
Apply a Linux kernel patch that fixes the UAF in the aloop driver.

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
high — CVSS 7
Published
2026-08-06
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-46090

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.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-46090coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

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.

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