NULL pointer dereference in Linux kernel - CVE-2026-45836
Published: May 27, 2026
Vulnerability identifier: #VU132365
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-45836
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in l2cap_sock_get_sndtimeo_cb() when handling Bluetooth L2CAP socket operations. A local user can trigger the vulnerable code path to cause a denial of service.
How to mitigate CVE-2026-45836
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/32bd343803d4ba47cc516f9d5f037f01b855d767
- https://git.kernel.org/stable/c/58dc5e3d8768e121907608e6e196a908512fb083
- https://git.kernel.org/stable/c/78a88d43dab8d23aeef934ed8ce34d40e6b3d613
- https://git.kernel.org/stable/c/a93d66907dd4d29b65c9797a93784bf61906d6d6
- https://git.kernel.org/stable/c/cf1fd517f892ded88168df878f834b625133f86d