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CVE-2026-23191 is a time-of-check/time-of-use race condition in the Linux kernel ALSA aloop loopback driver. The PCM trigger callback checks PCM state and stops a tied substream without holding the corresponding cable lock. Frequent PCM triggering concurrent with opening or closing the tied stream can cause use-after-free. The affected logic includes loopback_check_format(), particularly its handling of the capture PCM stream that may be stopped. Exploitation may cause kernel instability, crashes, or memory corruption.
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No public exploit code observed for this vulnerability.
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53 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A race-condition vulnerability in the Linux kernel ALSA loopback (aloop) PCM trigger path.
A Unity Linux vulnerability tracked as CVE-2026-23191. Exploitation requires local access, high attack complexity, and low privileges, but could result in high confidentiality, integrity, and availability impact.
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.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.