CVE-2026-46004: Linux kernel · ALSA: caiaq: Handle probe errors properly
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in f537e3ad69609f6924a4db6b4a7f6561f5288bdd : update Linux kernel when convenient.
Data as of 6 Nov 2026, 16:34 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- 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
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-06.
- Patch
- Available – fixed in f537e3ad69609f6924a4db6b4a7f6561f5288bdd, e59ecd4ee3a450db6cb4e4ecaa3efdd593f80056, da938aa9fc7826901921dcea225948ab21a97e45 +5
Exploitation evidence
Disclosed: evidence found.
CVE published 27 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 6 Nov 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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Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: caiaq: Handle probe errors properly The probe procedure of setup_card() in caiaq driver doesn't treat the error cases gracefully, e.g. the error from snd_card_register() calls snd_card_free() but continues. This would lead to a UAF for the further calls like snd_usb_caiaq_control_init(), as Berk suggested in another patch in the link below. However, the problem is not only that; in general, this function drops the all error handlings (as it's a void function) although its caller can propagate an error to snd_probe(), which eventually calls snd_card_free() as a proper error path. That said, we should treat each error case in setup_card(), and just return the error code promptly, which is then handled later as a fatal error in snd_probe(). This patch achieves it by changing the setup_card() to return an error code. Also, the superfluous snd_card_free() call is removed, too. Note that card->private_free can be set still safely at returning an error. All called functions in card_free() have checks of the unassigned resources or NULL checks.
References
- git.kernel.org/stable/c/da938aa9fc7826901921dcea225948ab21a97e45 (opens in a new tab)
- git.kernel.org/stable/c/09616e25f502080ba684fc7fcf959d1376ab756d (opens in a new tab)
- git.kernel.org/stable/c/b956e48371f2ff72b76be9a829800ecec963bd45 (opens in a new tab)
- git.kernel.org/stable/c/f537e3ad69609f6924a4db6b4a7f6561f5288bdd (opens in a new tab)
- git.kernel.org/stable/c/6251e3e256337a30160ef59ab1580dde4d1acd28 (opens in a new tab)
- git.kernel.org/stable/c/e59ecd4ee3a450db6cb4e4ecaa3efdd593f80056 (opens in a new tab)
- git.kernel.org/stable/c/096dd8519cf2f768e9e14f224b627f7aaee1a9c5 (opens in a new tab)
- git.kernel.org/stable/c/28abd224db4a49560b452115bca3672a20e45b2f (opens in a new tab)