Use-after-free in Linux kernel - CVE-2023-53794
Published: December 10, 2025 / Updated: December 12, 2025
Vulnerability identifier: #VU119709
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2023-53794
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 smb2_reconnect_server() function in fs/smb/client/smb2pdu.c. A local user can escalate privileges on the system.
How to mitigate CVE-2023-53794
Install update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/759ffc164d95a32c09528766d74d9b4fb054e8f4
- https://git.kernel.org/stable/c/7e4f5c3f01fb0e51ca438e43262d858daf9a0a76
- https://git.kernel.org/stable/c/99f280700b4cc02d5f141b8d15f8e9fad0418f65
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.47
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4.12
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5