🛡️ AZL-77712 — kernel

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

CVE-2026-23208 affecting package kernel 6.6.126.1-1

In 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

Affected software

AZL-77712 is recorded against 1 package.

  • kernel

Timeline and source

Published on 14 February 2026 and last revised on 21 April 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Web)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-02-14
Updated 2026-08-12
Modified 2026-04-21
Fix URL N/A

Affected Packages

Software From version Fixed in
kernel — —

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