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CVE-2026-23191 is a race-condition vulnerability in the Linux kernel ALSA aloop loopback driver. The flaw is in PCM trigger handling, where the driver checks PCM state and stops the tied substream in the corresponding cable outside the protection of the cable lock. This unsynchronized access allows concurrent trigger activity and open/close operations on the paired stream to invalidate objects while they are still being referenced, resulting in a use-after-free condition. The issue was observed under frequent trigger operations combined with opening and closing the tied stream. The upstream fix expands coverage of the cable spinlock around most of loopback_check_format(), adds NULL checks, and changes the logic to verify the state of the capture PCM stream before attempting to stop it.
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49 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel ALSA aloop race condition vulnerability at PCM trigger, fixed in this Red Hat kernel update.
A Linux kernel ALSA aloop race condition vulnerability at PCM trigger.
A Linux kernel ALSA aloop flaw involving racy access at PCM trigger.
A Linux kernel ALSA aloop vulnerability caused by racy access at PCM trigger.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.