CVE-2026-23089: Linux kernel · ALSA: usb-audio: Fix use-after-free in snd_usb_mixer_free()
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in e6f103a22b08daf5df2f4aa158081840e5910963 : patch Linux kernel soon.
Data as of 26 Oct 2026, 17:30 UTC
Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Total control over the software or total information disclosure
CISA SSVC assessment, 2026-06-10.
- Patch
- Available – fixed in e6f103a22b08daf5df2f4aa158081840e5910963, dc1a5dd80af1ee1f29d8375b12dd7625f6294dad, 7009daeefa945973a530b2f605fe445fc03747af +4
Exploitation evidence
Disclosed: evidence found.
CVE published 4 Feb 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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AI-suggested
A fix is available in the Linux kernel as indicated by the fixed commit versions. Users should update to a Linux kernel version that includes the fix identified by the provided commit hashes to mitigate this vulnerability.
Description
A use-after-free vulnerability in the Linux kernel ALSA usb-audio driver was fixed. The flaw occurs when snd_usb_create_mixer() fails, leading snd_usb_mixer_free() to free memory that is still referenced by controls, causing a use-after-free read during snd_card_register().
References
- git.kernel.org/stable/c/51b1aa6fe7dc87356ba58df06afb9677c9b841ea (opens in a new tab)
- git.kernel.org/stable/c/56fb6efd5d04caf6f14994d51ec85393b9a896c6 (opens in a new tab)
- git.kernel.org/stable/c/7009daeefa945973a530b2f605fe445fc03747af (opens in a new tab)
- git.kernel.org/stable/c/7bff0156d13f0ad9436e5178b979b063d59f572a (opens in a new tab)
- git.kernel.org/stable/c/e6f103a22b08daf5df2f4aa158081840e5910963 (opens in a new tab)
- git.kernel.org/stable/c/dc1a5dd80af1ee1f29d8375b12dd7625f6294dad (opens in a new tab)
- git.kernel.org/stable/c/930e69757b74c3ae083b0c3c7419bfe7f0edc7b2 (opens in a new tab)