Input validation error in Linux kernel - CVE-2023-53477
Published: October 1, 2025 / Updated: October 27, 2025
Vulnerability identifier: #VU116372
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-2023-53477
CWE-ID: CWE-20
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 perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the rt6_nlmsg_size() function in net/ipv6/route.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2023-53477
Install update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/4cc59f386991ec9374cb4bc83dbe1c0b5a95033f
- https://git.kernel.org/stable/c/aa75d826c221e8d48607aef33836cf872a159cf1
- https://git.kernel.org/stable/c/aba298b35619213ca787d08d472049627d8cd012
- https://git.kernel.org/stable/c/da26369377f0b671c14692e2d65ceb38131053e1
- https://git.kernel.org/stable/c/dcdddb5f490890d058ea1f194d661219e92fe88d
- https://git.kernel.org/stable/c/e11e4d524eba2d3c8fdf897d7ce3853f7573bae9
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.18