SB20260816224 - Out-of-bounds write in Linux kernel usb

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Main Vulnerability Database SB20260816224

SB20260816224 - Out-of-bounds write in Linux kernel usb

Published: August 16, 2026

Security Bulletin ID SB20260816224
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds write (CVE-ID: CVE-2026-74498)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service or corrupt kernel memory.

The vulnerability exists due to an out-of-bounds write in the ALSA USB audio endpoint DMA buffer handling in data_ep_set_params() when processing USB audio endpoints with the fill_max descriptor flag set. A local user can trigger oversized packet transfers to cause a denial of service or corrupt kernel memory.

The issue occurs because the allocated buffer size is based on the original sample-rate-derived value while transfer packets may use the larger maximum packet size.


Remediation

Install update from vendor's website.

References