SB2026102227 - Out-of-bounds read in Linux kernel bluetooth

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Main Vulnerability Database SB2026102227

SB2026102227 - Out-of-bounds read in Linux kernel bluetooth

Published: October 22, 2026

Security Bulletin ID SB2026102227
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Adjecent network
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-98457)

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

CVSSv4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker on the local network to trigger out-of-bounds reads that may cause a denial of service or disclose kernel memory.

The vulnerability exists due to out-of-bounds reads in the Linux kernel Bluetooth L2CAP receive path when processing short ERTM or streaming-mode frames. A remote attacker on the local network can send a frame with an incomplete two-byte or four-byte control field, or an insufficient CRC16 frame check sequence, to trigger reads beyond the frame boundary. In the CRC16 case, subtracting two from the remaining length can wrap, leaving the buffer unchanged before the frame check sequence is read.


Remediation

Install update from vendor's website.

References