Out-of-bounds Write Affecting linux-aws-6.12 package, versions <6.12.80-r0


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.18% (8th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-LINUXAWS612-15991821
  • published12 Apr 2026
  • disclosed14 Feb 2026

Introduced: 14 Feb 2026

CVE-2026-23208  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Chainguard linux-aws-6.12 to version 6.12.80-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-aws-6.12 package and not the linux-aws-6.12 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

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

CVSS Base Scores

version 3.1