#VU102159 Improper locking in Linux kernel - CVE-2024-56703

Vulnerability identifier: #VU102159

Vulnerability risk: Low

CVSSv4.0: 4.3 [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

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: 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 |() 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.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

---

External links
https://git.kernel.org/stable/c/11edcd026012ac18acee0f1514db3ed1b160fc6f
https://git.kernel.org/stable/c/34a949e7a0869dfa31a40416d2a56973fae1807b
https://git.kernel.org/stable/c/d9ccb18f83ea2bb654289b6ecf014fd267cc988b

---

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.