Use-after-free in Linux kernel - CVE-2026-64011
Published: July 20, 2026
Vulnerability identifier: #VU138646
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-2026-64011
CWE-ID: CWE-416
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 use-after-free in llcp_sock_release() when releasing an LLCP socket in connecting state. A local user can trigger socket release in that state to cause a denial of service.
How to mitigate CVE-2026-64011
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/2dfdaaf7d933b676124aadec6698825e95f94fe9
- https://git.kernel.org/stable/c/89ba026747019ee643d29407435ddc118e6ca908
- https://git.kernel.org/stable/c/912ebc49d4406a17fe73e5671d674fbc2f6b2634
- https://git.kernel.org/stable/c/bc421d0826dedbba37580a25405eafb599e76d42
- https://git.kernel.org/stable/c/cdc17e09a636c7f936f771902535a7515a7608fc
- https://git.kernel.org/stable/c/e00f50f8697724a6f1d2d35744c1332c9912dac5
- https://git.kernel.org/stable/c/f4268b466190dae95a7585f69b4f1f8ad097632c
- https://git.kernel.org/stable/c/fb29f6bbe433f3decad227588809636c25f2a287