Improper locking in Linux kernel - CVE-2024-56703
Published: December 30, 2024 / Updated: May 11, 2025
Vulnerability identifier: #VU102159
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-2024-56703
CWE-ID: CWE-667
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 locking within the |() function in tools/testing/selftests/net/ipv6_route_update_soft_lockup.sh, within the fib6_select_path(), ip6_route_mpath_notify(), rt6_nlmsg_size(), rt6_fill_node() and inet6_rt_notify() functions in net/ipv6/route.c, within the fib6_del_route() function in net/ipv6/ip6_fib.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2024-56703
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/11edcd026012ac18acee0f1514db3ed1b160fc6f
- https://git.kernel.org/stable/c/34a949e7a0869dfa31a40416d2a56973fae1807b
- https://git.kernel.org/stable/c/d9ccb18f83ea2bb654289b6ecf014fd267cc988b
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.128
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.11.11
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.2
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.75