Input validation error in Linux kernel - CVE-2023-53684
Published: October 8, 2025 / Updated: October 26, 2025
Vulnerability identifier: #VU116829
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2023-53684
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the copy_to_user_aead(), copy_to_user_ealg() and copy_to_user_state_extra() functions in net/xfrm/xfrm_user.c. A local user can perform a denial of service (DoS) attack.
Affected software
Linux kernel
How to mitigate CVE-2023-53684
Install update from vendor's repository.
Linux kernel - addressed in versions 5.15.106, 6.1.23, 6.2.10, 6.3
External References
- https://git.kernel.org/stable/c/0725daaa9a879388ed312110f62dbd5ea2d75f8f
- https://git.kernel.org/stable/c/1a351e26cc010d6991fbbd5701ac16581372e26f
- https://git.kernel.org/stable/c/5218af4ad5d8948faac19f71583bcd786c3852df
- https://git.kernel.org/stable/c/8222d5910dae08213b6d9d4bc9a7f8502855e624
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.106
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.23
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.10
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3