Missing release of memory after effective lifetime in Linux kernel - CVE-2026-23299
Published: March 25, 2026
Vulnerability identifier: #VU124561
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-2026-23299
CWE-ID: CWE-401
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 improper memory management in the Bluetooth socket destructors when handling SKBs in the sk_error_queue. A local user can enable TX timestamping via SO_TIMESTAMPING and avoid reading timestamps, or trigger unexpected controller removal, leading to unprocessed SKBs accumulating in the sk_error_queue and causing memory leakage.
Successful exploitation may result in gradual memory exhaustion, potentially leading to system instability or denial of service.
How to mitigate CVE-2026-23299
Install security update from vendor's repository.