Bug 2493744 (CVE-2026-53291)

Summary: CVE-2026-53291 kernel: ALSA: hda/conexant: Fix missing error check for jack detection
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Priority: low    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Advanced Linux Sound Architecture (ALSA) hda/conexant driver within the Linux kernel. A missing error check for the `snd_hda_jack_detect_enable_callback()` function's return value in `cx_probe()` can lead to a kernel crash. If the registration of the jack detection callback fails, the driver may attempt to handle jack events or access an uninitialized structure, resulting in a Denial of Service (DoS).
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Description OSIDB Bzimport 2026-06-26 21:04:38 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ALSA: hda/conexant: Fix missing error check for jack detection

In cx_probe(), the return value of snd_hda_jack_detect_enable_callback()
is ignored. This function returns a pointer, and if it fails (e.g., due
to memory allocation failure), it returns an error pointer which must
be checked using IS_ERR().

If the registration fails, the driver continues to probe, but the jack
detection callback will not be registered. This can lead to a kernel
crash later when the driver attempts to handle jack events or accesses
the uninitialized structure.

Check the return value using IS_ERR() and propagate the error via
PTR_ERR() to the probe caller.
Comment 1 Mauro Matteo Cascella 2026-06-29 09:05:19 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062617-CVE-2026-53291-451e@gregkh/T