Input validation error in Linux kernel - CVE-2025-21765
Published: February 27, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU105090
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-2025-21765
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 ip6_default_advmss() function in net/ipv6/route.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2025-21765
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/3c8ffcd248da34fc41e52a46e51505900115fc2a
- https://git.kernel.org/stable/c/4176a68b0db8fc74ac14fcd00ba8231371051dc2
- https://git.kernel.org/stable/c/550ed693f47370502a71b85382e7f9e6417300b8
- https://git.kernel.org/stable/c/713a40c892f40300d63691d9f85b2a23b48fe1e8
- https://git.kernel.org/stable/c/84212387caadb211cd9dadd6fd5563bd37dc1f5e
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.129