CVE-2024-50024 net: Fix an unsafe loop on the list
A local attacker can crash the Linux kernel by deleting a genetlink family with active listeners due to an unsafe list iteration.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2024-50024?
CVE-2024-50024 is a high-severity vulnerability in Linux kernel, published on 21 Oct 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
In the Linux kernel, the following vulnerability has been resolved:
net: Fix an unsafe loop on the list
The kernel may crash when deleting a genetlink family if there are still listeners for that family:
Oops: Kernel access of bad area, sig: 11 [#1] ... NIP [c000000000c080bc] netlink_update_socket_mc+0x3c/0xc0 LR [c000000000c0f764] __netlink_clear_multicast_users+0x74/0xc0 Call Trace: __netlink_clear_multicast_users+0x74/0xc0 genl_unregister_family+0xd4/0x2d0
Change the unsafe loop on the list to a safe one, because inside the loop there is an element removal from this list.
Which versions are affected by CVE-2024-50024?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-50024?
Apply the vendor's patch.
Is CVE-2024-50024 being exploited?
There is no known exploitation of CVE-2024-50024 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-51398, AZL-51471, BELL-CVE-2024-50024, DEBIAN-CVE-2024-50024, GHSA-wwxf-59f4-wv9m, UBUNTU-CVE-2024-50024.