Linux Kernel up to 6.17.8 USB snd_usb_create_streams null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.17.8 and classified as critical. Affected by this vulnerability is the function snd_usb_create_streams of the component USB Handler. The manipulation leads to null pointer dereference. This vulnerability is documented as CVE-2025-40275. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.17.8. This issue affects the function snd_usb_create_streams of the component USB Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

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.

It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2025-40275 since 04/16/2025. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 278559 (Debian dla-4404 : ata-modules-5.10.0-35-armmp-di - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.302, 5.10.247, 5.15.197, 6.1.159, 6.6.117, 6.12.59 or 6.17.9 eliminates this vulnerability. Applying the patch 23aea9c74aeea2625aaf4fbcc6beb9d09e30f9e4/c5c08965ab96b16361e69a1e2a0e89dbcb99b5a6/9f282104627be5fbded3102ff9004f753c55a063/2762d3ea9c929ca4094541ca517c317ffa94625b/57f607c112966c21240c424b33e2cb71e121dcf0/cbdbfc756f2990942138ed0138da9303b4dbf9ff/85568535893600024d7d8794f4f8b6428b521e0c/632108ec072ad64c8c83db6e16a7efee29ebfb74 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (278559), EUVD (EUVD-2025-201580) and CERT Bund (WID-SEC-2025-2756). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • NetApp FAS
  • NetApp AFF
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source Linux Kernel
  • Microsoft Azure Linux

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 278559
Nessus Name: Debian dla-4404 : ata-modules-5.10.0-35-armmp-di - security update

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.4.302/5.10.247/5.15.197/6.1.159/6.6.117/6.12.59/6.17.9
Patch: 23aea9c74aeea2625aaf4fbcc6beb9d09e30f9e4/c5c08965ab96b16361e69a1e2a0e89dbcb99b5a6/9f282104627be5fbded3102ff9004f753c55a063/2762d3ea9c929ca4094541ca517c317ffa94625b/57f607c112966c21240c424b33e2cb71e121dcf0/cbdbfc756f2990942138ed0138da9303b4dbf9ff/85568535893600024d7d8794f4f8b6428b521e0c/632108ec072ad64c8c83db6e16a7efee29ebfb74

Timelineinfo

04/16/2025 CVE reserved
12/07/2025 +235 days Advisory disclosed
12/07/2025 +0 days VulDB entry created
02/23/2026 +78 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-40275 (🔒)
GCVE (CVE): GCVE-0-2025-40275
GCVE (VulDB): GCVE-100-334631
EUVD: 🔒
CERT Bund: WID-SEC-2025-2756 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 12/07/2025 08:53
Updated: 02/23/2026 04:59
Changes: 12/07/2025 08:53 (59), 12/07/2025 09:28 (1), 12/09/2025 07:33 (7), 12/13/2025 08:43 (2), 01/04/2026 12:38 (1), 01/22/2026 08:31 (1), 02/23/2026 04:59 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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