ALSA: usb-audio: Prevent excessive number of frames

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-23208
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-02-14 17:15:58 UTC
Updated2026-10-21 13:18:34 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Prevent excessive number of frames In this case, the user constructed the parameters with maxpacksize 40 for rate 22050 / pps 1000, and packsize[0] 22 packsize[1] 23. The buffer size for each data URB is maxpacksize * packets, which in this example is 40 * 6 = 240; When the user performs a write operation to send audio data into the ALSA PCM playback stream, the calculated number of frames is packsize[0] * packets = 264, which exceeds the allocated URB buffer size, triggering the out-of-bounds (OOB) issue reported by syzbot [1]. Added a check for the number of single data URB frames when calculating the number of frames to prevent [1]. [1] BUG: KASAN: slab-out-of-bounds in copy_to_urb+0x261/0x460 sound/usb/pcm.c:1487 Write of size 264 at addr ffff88804337e800 by task syz.0.17/5506 Call Trace: copy_to_urb+0x261/0x460 sound/usb/pcm.c:1487 prepare_playback_urb+0x953/0x13d0 sound/usb/pcm.c:1611 prepare_outbound_urb+0x377/0xc50 sound/usb/endpoint.c:333

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-787

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 02c56650f3c118d3752122996d96173d26bb13aa 480a1490c595a242f27493a4544b3efb21b29f6a git Not specified
CNA Linux Linux affected 5ef30e443e6d3654cccecec99cf481a69a0a6d3b ab0b5e92fc36ee82c1bd01fe896d0f775ed5de41 git Not specified
CNA Linux Linux affected 99703c921864a318e3e8aae74fde071b1ff35bea 282aba56713bbc58155716b55ca7222b2d9cf3c8 git Not specified
CNA Linux Linux affected 2d50acd7dbd0682a56968ad9551341d7fc5b6eaf c4dc012b027c9eb101583011089dea14d744e314 git Not specified
CNA Linux Linux affected aba41867dd66939d336fdf604e4d73b805d8039f e0ed5a36fb3ab9e7b9ee45cd17f09f6d5f594360 git Not specified
CNA Linux Linux affected d288dc74f8cf95cb7ae0aaf245b7128627a49bf3 d67dde02049e632ba58d3c44a164a74b6a737154 git Not specified
CNA Linux Linux affected f0bd62b64016508938df9babe47f65c2c727d25c 152fc4f7b4a8af1c0418d2722f3b2729799cc837 git Not specified
CNA Linux Linux affected f0bd62b64016508938df9babe47f65c2c727d25c 81e4b0009f2acc841d77a24fd796528b0bf62c4e git Not specified
CNA Linux Linux affected f0bd62b64016508938df9babe47f65c2c727d25c 62932d9ed639a9fa71b4ac1a56766a4b43abb7e4 git Not specified
CNA Linux Linux affected f0bd62b64016508938df9babe47f65c2c727d25c ef5749ef8b307bf8717945701b1b79d036af0a15 git Not specified
CNA Linux Linux affected 4.4.229 4.4.230 semver Not specified
CNA Linux Linux affected 4.9.229 4.9.230 semver Not specified
CNA Linux Linux affected 4.14.186 4.14.188 semver Not specified
CNA Linux Linux affected 4.19.130 4.19.132 semver Not specified
CNA Linux Linux affected 5.4.49 5.4.51 semver Not specified
CNA Linux Linux affected 5.7.6 5.7.8 semver Not specified
CNA Linux Linux affected 5.8 Not specified
CNA Linux Linux unaffected 5.8 semver Not specified
CNA Linux Linux unaffected 4.4.230 4.4.* semver Not specified
CNA Linux Linux unaffected 4.9.230 4.9.* semver Not specified
CNA Linux Linux unaffected 4.14.188 4.14.* semver Not specified
CNA Linux Linux unaffected 4.19.132 4.19.* semver Not specified
CNA Linux Linux unaffected 5.4.51 5.4.* semver Not specified
CNA Linux Linux unaffected 5.7.8 5.7.* semver Not specified
CNA Linux Linux unaffected 6.6.160 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.114 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.10 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/ab0b5e92fc36ee82c1bd01fe896d0f775ed5de41 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/ef5749ef8b307bf8717945701b1b79d036af0a15 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/480a1490c595a242f27493a4544b3efb21b29f6a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/282aba56713bbc58155716b55ca7222b2d9cf3c8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d67dde02049e632ba58d3c44a164a74b6a737154 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/152fc4f7b4a8af1c0418d2722f3b2729799cc837 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c4dc012b027c9eb101583011089dea14d744e314 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/62932d9ed639a9fa71b4ac1a56766a4b43abb7e4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/e0ed5a36fb3ab9e7b9ee45cd17f09f6d5f594360 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/81e4b0009f2acc841d77a24fd796528b0bf62c4e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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