Not yet scoredPublished Dec 6, 2025

CVE-2025-40275ALSA: usb-audio: Fix NULL pointer dereference in snd_usb_mixer_controls_badd

Updated under an hour ago (Oct 28, 2026, 6:00 PM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Fix NULL pointer dereference in snd_usb_mixer_controls_badd In snd_usb_create_streams(), for UAC version 3 devices, the Interface Association Descriptor (IAD) is retrieved via usb_ifnum_to_if(). If this call fails, a fallback routine attempts to obtain the IAD from the next interface and sets a BADD profile. However, snd_usb_mixer_controls_badd() assumes that the IAD retrieved from usb_ifnum_to_if() is always valid, without performing a NULL check. This can lead to a NULL pointer dereference when usb_ifnum_to_if() fails to find the interface descriptor. This patch adds a NULL pointer check after calling usb_ifnum_to_if() in snd_usb_mixer_controls_badd() to prevent the dereference. This issue was discovered by syzkaller, which triggered the bug by sending a crafted USB device descriptor.

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Deferred
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	17156f23e93c0f59e06dd2aaffd06221341caaee builds before 23aea9c74aeea2625aaf4fbcc6beb9d09e30f9e4; from 17156f23e93c0f59e06dd2aaffd06221341caaee before c5c08965ab96b16361e69a1e2a0e89dbcb99b5a6; 17156f23e93c0f59e06dd2aaffd06221341caaee builds before 9f282104627be5fbded3102ff9004f753c55a063; 17156f23e93c0f59e06dd2aaffd06221341caaee builds before 2762d3ea9c929ca4094541ca517c317ffa94625b; 17156f23e93c0f59e06dd2aaffd06221341caaee builds before 57f607c112966c21240c424b33e2cb71e121dcf0; from 17156f23e93c0f59e06dd2aaffd06221341caaee before cbdbfc756f2990942138ed0138da9303b4dbf9ff; from 17156f23e93c0f59e06dd2aaffd06221341caaee before 85568535893600024d7d8794f4f8b6428b521e0c; from 17156f23e93c0f59e06dd2aaffd06221341caaee before 632108ec072ad64c8c83db6e16a7efee29ebfb74	CNA record

References

References

https://git.kernel.org/stable/c/23aea9c74aeea2625aaf4fbcc6beb9d09e30f9e4
https://git.kernel.org/stable/c/c5c08965ab96b16361e69a1e2a0e89dbcb99b5a6
https://git.kernel.org/stable/c/9f282104627be5fbded3102ff9004f753c55a063
https://git.kernel.org/stable/c/2762d3ea9c929ca4094541ca517c317ffa94625b
https://git.kernel.org/stable/c/57f607c112966c21240c424b33e2cb71e121dcf0
https://git.kernel.org/stable/c/cbdbfc756f2990942138ed0138da9303b4dbf9ff
https://git.kernel.org/stable/c/85568535893600024d7d8794f4f8b6428b521e0c
https://git.kernel.org/stable/c/632108ec072ad64c8c83db6e16a7efee29ebfb74

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.