In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Fix out-of-bounds read in snd_usb_get_audioformat_uac3() In snd_usb_get_audioformat_uac3(), the length value returned from snd_usb_ctl_msg() is used directly for memory allocation without validation. This length is controlled by the USB device. The allocated buffer is cast to a uac3_cluster_header_descriptor and its fields are accessed without verifying that the buffer is large enough. If the device returns a smaller than expected length, this leads to an out-of-bounds read. Add a length check to ensure the buffer is large enough for uac3_cluster_header_descriptor.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

No data.

No data.

References
Link Providers
https://git.kernel.org/stable/c/0ee87c2814deb5e42921281116ac3abcb326880b cve-icon cve-icon
https://git.kernel.org/stable/c/11e740dc1a2c8590eb7074b5c4ab921bb6224c36 cve-icon cve-icon
https://git.kernel.org/stable/c/24ff7d465c4284529bbfa207757bffb6f44b6403 cve-icon cve-icon
https://git.kernel.org/stable/c/2dc1c3edf67abd30c757f8054a5da61927cdda21 cve-icon cve-icon
https://git.kernel.org/stable/c/6eb211788e1370af52a245d4d7da35c374c7b401 cve-icon cve-icon
https://git.kernel.org/stable/c/74fcb3852a2f579151ce80b9ed96cd916ba0d5d8 cve-icon cve-icon
https://git.kernel.org/stable/c/c3fb926abe90d86f5e3055e0035f04d9892a118b cve-icon cve-icon
https://git.kernel.org/stable/c/fb4e2a6e8f28a3c0ad382e363aeb9cd822007b8a cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025070934-CVE-2025-38249-a6a3@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-38249 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-38249 cve-icon
History

Thu, 17 Jul 2025 17:15:00 +0000

Type Values Removed Values Added
References

Tue, 15 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00024}

 epss

{'score': 0.00032}

Fri, 11 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00018}

 epss

{'score': 0.00024}

Thu, 10 Jul 2025 14:30:00 +0000

Type Values Removed Values Added
References

Thu, 10 Jul 2025 00:45:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Wed, 09 Jul 2025 10:45:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Fix out-of-bounds read in snd_usb_get_audioformat_uac3() In snd_usb_get_audioformat_uac3(), the length value returned from snd_usb_ctl_msg() is used directly for memory allocation without validation. This length is controlled by the USB device. The allocated buffer is cast to a uac3_cluster_header_descriptor and its fields are accessed without verifying that the buffer is large enough. If the device returns a smaller than expected length, this leads to an out-of-bounds read. Add a length check to ensure the buffer is large enough for uac3_cluster_header_descriptor.
Title ALSA: usb-audio: Fix out-of-bounds read in snd_usb_get_audioformat_uac3()
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-07-09T10:42:29.704Z

Updated: 2025-07-17T16:55:45.429Z

Reserved: 2025-04-16T04:51:23.997Z

Link: CVE-2025-38249

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-07-09T11:15:27.077

Modified: 2025-07-17T17:15:38.870

Link: CVE-2025-38249

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-07-09T00:00:00Z

Links: CVE-2025-38249 - Bugzilla