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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-40275 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/23aea9c74aeea2625aaf4fbcc6beb9d09e30f9e4 kernel.org
https://git.kernel.org/stable/c/2762d3ea9c929ca4094541ca517c317ffa94625b kernel.org
https://git.kernel.org/stable/c/57f607c112966c21240c424b33e2cb71e121dcf0 kernel.org
https://git.kernel.org/stable/c/632108ec072ad64c8c83db6e16a7efee29ebfb74 kernel.org
https://git.kernel.org/stable/c/85568535893600024d7d8794f4f8b6428b521e0c kernel.org
https://git.kernel.org/stable/c/9f282104627be5fbded3102ff9004f753c55a063 kernel.org
https://git.kernel.org/stable/c/c5c08965ab96b16361e69a1e2a0e89dbcb99b5a6 kernel.org
https://git.kernel.org/stable/c/cbdbfc756f2990942138ed0138da9303b4dbf9ff kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-40275
NVD Published Date:
12/06/2025
NVD Last Modified:
04/14/2026
Source:
kernel.org