Use-after-free in Linux kernel - CVE-2023-53186
Published: September 16, 2025 / Updated: September 22, 2025
Vulnerability identifier: #VU115385
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2023-53186
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 escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the skb_try_coalesce() function in net/core/skbuff.c. A local user can escalate privileges on the system.
How to mitigate CVE-2023-53186
Install update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/0646dc31ca886693274df5749cd0c8c1eaaeb5ca
- https://git.kernel.org/stable/c/5f692c992a3bb9a8018e3488098b401a4229e7ec
- https://git.kernel.org/stable/c/71850b5af92da21b4862a9bc55bda61091247d00
- https://git.kernel.org/stable/c/906a6689bb0191ad2a44131a3377006aa098af59
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.108