SB2026102661 - Off-by-one in Linux kernel bluetooth driver
Published: October 26, 2026
Security Bulletin ID
SB2026102661
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Off-by-one (CVE-ID: CVE-2026-99094)
CWE-ID: CWE-193 - Off-by-one Error
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause out-of-bounds kernel memory access, potentially resulting in a denial of service.
The vulnerability exists due to an off-by-one bounds check in the Intel Bluetooth PCIe driver's transmit processing when accessing the TFD and data buffer arrays. A local user can potentially trigger transmit processing with tfd_index equal to txq->count to access memory past the end of both arrays and cause a kernel crash.
Remediation
Install update from vendor's website.