CVE-2026-23208

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  2. Vulnerabilities (CVE)
  3. CVE-2026-23208
CVSS

No CVSS.

I

n 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

References
Link Resource
https://git.kernel.org/stable/c/282aba56713bbc58155716b55ca7222b2d9cf3c8
https://git.kernel.org/stable/c/480a1490c595a242f27493a4544b3efb21b29f6a
https://git.kernel.org/stable/c/62932d9ed639a9fa71b4ac1a56766a4b43abb7e4
https://git.kernel.org/stable/c/ab0b5e92fc36ee82c1bd01fe896d0f775ed5de41
https://git.kernel.org/stable/c/c4dc012b027c9eb101583011089dea14d744e314
https://git.kernel.org/stable/c/d67dde02049e632ba58d3c44a164a74b6a737154
https://git.kernel.org/stable/c/e0ed5a36fb3ab9e7b9ee45cd17f09f6d5f594360
https://git.kernel.org/stable/c/ef5749ef8b307bf8717945701b1b79d036af0a15
Configurations

No configuration.

History

18 Feb 2026, 17:52

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: ALSA: usb-audio: Prevenir un número excesivo de tramas En este caso, el usuario construyó los parámetros con maxpacksize 40 para una tasa de 22050 / pps 1000, y packsize[0] 22 packsize[1] 23. El tamaño del búfer para cada URB de datos es maxpacksize * paquetes, que en este ejemplo es 40 * 6 = 240; Cuando el usuario realiza una operación de escritura para enviar datos de audio al flujo de reproducción ALSA PCM, el número calculado de tramas es packsize[0] * paquetes = 264, lo que excede el tamaño del búfer URB asignado, desencadenando el problema de fuera de límites (OOB) reportado por syzbot [1]. Se añadió una comprobación para el número de tramas URB de datos individuales al calcular el número de tramas para prevenir [1]. [1] BUG: KASAN: slab-out-of-bounds en copy_to_urb+0x261/0x460 sound/usb/pcm.c:1487 Escritura de tamaño 264 en la dirección ffff88804337e800 por la tarea syz.0.17/5506 Traza de Llamada: 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

16 Feb 2026, 09:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/282aba56713bbc58155716b55ca7222b2d9cf3c8 -
  • () https://git.kernel.org/stable/c/480a1490c595a242f27493a4544b3efb21b29f6a -
  • () https://git.kernel.org/stable/c/ab0b5e92fc36ee82c1bd01fe896d0f775ed5de41 -
  • () https://git.kernel.org/stable/c/c4dc012b027c9eb101583011089dea14d744e314 -
  • () https://git.kernel.org/stable/c/d67dde02049e632ba58d3c44a164a74b6a737154 -
  • () https://git.kernel.org/stable/c/e0ed5a36fb3ab9e7b9ee45cd17f09f6d5f594360 -

14 Feb 2026, 17:15

Type Values Removed Values Added
New CVE
Information

Published : 2026-02-14 17:15

Updated : 2026-02-18 17:52

NVD link : CVE-2026-23208

Mitre link : CVE-2026-23208

CVE.ORG link : CVE-2026-23208

JSON object : View

Products Affected

No product.

CWE

No CWE.