#VU105145 Improper locking in Linux kernel - CVE-2025-21809
Published: February 28, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU105145
Vulnerability risk: Low
CVSSv4.0: 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-2025-21809
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the rxrpc_new_incoming_peer(), rxrpc_lookup_peer() and __rxrpc_put_peer() functions in net/rxrpc/peer_object.c, within the rxrpc_peer_keepalive_dispatch() and rxrpc_peer_keepalive_worker() functions in net/rxrpc/peer_event.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
External links
- https://git.kernel.org/stable/c/0e77dd41689637ac4e1b8fe0f27541f373640855
- https://git.kernel.org/stable/c/10ba5a3d57af20e494e0d979d1894260989235dd
- https://git.kernel.org/stable/c/79d458c13056559d49b5e41fbc4b6890e68cf65b
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.2
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.14