Bug 2507045 (CVE-2026-64482)

Summary: CVE-2026-64482 kernel: ALSA: gus: check snd_ctl_new1() return value
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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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 Linux kernel's Advanced Linux Sound Architecture (ALSA) Gravis Ultrasound (GUS) driver. When memory allocation fails, the `snd_ctl_new1()` function can return a null value. The `snd_gf1_pcm_volume_control()` function does not properly check for this null return, leading to a null pointer dereference. This vulnerability could allow a local attacker to cause a system crash, resulting in a denial of service.
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Description OSIDB Bzimport 2026-07-25 10:02:08 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ALSA: gus: check snd_ctl_new1() return value

snd_ctl_new1() can return NULL when memory allocation fails.
snd_gf1_pcm_volume_control() does not check the return value before
dereferencing kctl->id.index, which can lead to a NULL pointer
dereference.

Add a NULL check after snd_ctl_new1() and return -ENOMEM if it fails.
Comment 1 Mauro Matteo Cascella 2026-07-29 08:07:48 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026072548-CVE-2026-64482-08ac@gregkh/T