SB20260529183 - Out-of-bounds read in Linux kernel bluetooth driver

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Main Vulnerability Database SB20260529183

SB20260529183 - Out-of-bounds read in Linux kernel bluetooth driver

Published: May 29, 2026

Security Bulletin ID SB20260529183
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-46123)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local attacker to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in virtbt_rx_work() and virtbt_rx_handle() when processing device-reported receive lengths from the virtio Bluetooth backend. A local attacker can provide a crafted length value to cause the kernel to read uninitialized memory and disclose sensitive information.

The issue can be triggered when the backend reports a receive length larger than the 1000-byte buffer exposed to the device, or when it reports an empty completion with a zero length.


Remediation

Install update from vendor's website.

References