SB20261022342 - Use-after-free in Linux kernel bluetooth
Published: October 22, 2026
Security Bulletin ID
SB20261022342
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) Use-after-free (CVE-ID: CVE-2026-98735)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service through a potential kernel crash.
The vulnerability exists due to use-after-free in the Linux kernel Bluetooth ACL and LE transmit schedulers when channel deletion races with channel selection and transmission. A local user can trigger overlapping channel transmission and teardown to cause a denial of service if the transmit path accesses channel memory after it has been freed.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/4fda8f0abeea9929036446d89a476fb8298abcb0
- https://git.kernel.org/stable/c/51f95ea451f25d7e3f048c0f438f04fa74688aae
- https://git.kernel.org/stable/c/780affacd92977fd9b819bdc4f26a6832cb27fda
- https://git.kernel.org/stable/c/86e9708f9d19a7f1bd5dc9c1652d07707f79f5bd
- https://git.kernel.org/stable/c/f4845ab191a4f686a5da481fbba90ed73bb693b0