CVE-2022-2586 Linux Kernel Use-After-Free
A use-after-free in the Linux kernel nftables subsystem allows local attackers to potentially execute code or escalate privileges.
- Exploited in the wild
- Since 26 Jun 2024
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-2586?
CVE-2022-2586 is a medium-severity use after free vulnerability in Canonical Ubuntu Linux, published on 8 Jan 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
It was discovered that a nft object or expression could reference a nft set on a different nft table, leading to a use-after-free once that table was deleted.
Weakness: CWE-416
Which versions are affected by CVE-2022-2586?
It affects 4 products.
Products include Canonical Ubuntu Linux, Linux kernel, Siemens Simatic S7-1500 Tm Mfp Firmware, Siemens Sinec Os.
How do I fix CVE-2022-2586?
Apply the vendor's patch. US federal agencies must fix it by 17 Jul 2024.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2022-2586 being exploited?
Yes. Attackers have exploited CVE-2022-2586 in the wild since at least 26 Jun 2024.
Public exploit code: 3 proofs of concept on GitHub.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as AZL-33260, DEBIAN-CVE-2022-2586, UBUNTU-CVE-2022-2586.