CVE-2026-89736Medium· 5.5▾ SunlitA flaw was found in the Linux kernel's USB audio gadget driver (u_audio). This vulnerability occurs during sound card disconnection when Asynchronous Linux Sound Architecture (ALSA) control elements (kctls) remain open in userspace. A loca…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.2%
— → 7
none → high
— → 7
none → high
— → 7.8
none → high
7.8 → 7
7 → 7.8
Last analysed / modified upstream
7.8 → 5.5
high → medium
A flaw was found in the Linux kernel's USB audio gadget driver (u_audio). This vulnerability occurs during sound card disconnection when Asynchronous Linux Sound Architecture (ALSA) control elements (kctls) remain open in userspace. A local attacker can exploit this timing issue by interacting with these kctls, leading to a use-after-free memory corruption. This could potentially result in arbitrary code execution or a denial of service.
kernel: usb: gadget: u_audio: Fix use-after-free on sound card disconnect — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-21.
Not affected:
Refer to the advisory for fix availability.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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