CVE-2026-53291
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.
Affected versions
Linux kernel versions
5.15.149,
6.1.77,
6.6.16,
6.7.4,
6.8
and later are affected. Fixed in
5.15.209,
6.1.175,
6.6.141,
6.12.91,
6.18.33,
7.0.10,
7.1
and their respective stable series.
References
7 totalFrequently asked questions
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What is CVE-2026-53291?
CVE-2026-53291 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.15.149 onward and has been patched in 5.15.209, 6.1.175, 6.6.141 and others. CVE-2026-53291 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-53291?
Yes — CVE-2026-53291 has been patched. Fixed versions include 5.15.209, 6.1.175, 6.6.141 and others. If you are running Linux kernel 5.15.149 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-53291 actively exploited?
No — CVE-2026-53291 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.