CVE-2022-4543 Information disclosure in Linux kernel
Local attackers can leak KASLR base addresses via prefetch side-channels on Intel systems, weakening kernel address space layout randomization.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-4543?
CVE-2022-4543 is a medium-severity vulnerability in Linux kernel, published on 11 Jan 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw named "EntryBleed" was found in the Linux Kernel Page Table Isolation (KPTI). This issue could allow a local attacker to leak KASLR base via prefetch side-channels based on TLB timing for Intel systems.
Which versions are affected by CVE-2022-4543?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-4543?
Apply the vendor's patch.
Is CVE-2022-4543 being exploited?
There is no known exploitation of CVE-2022-4543 in the wild and no public exploit code.
Public exploit code: 2 proofs of concept on GitHub.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-12989, AZL-34862, DEBIAN-CVE-2022-4543, GHSA-252r-7vwr-8rfh, ROOT-OS-DEBIAN-12-CVE-2022-4543, ROOT-OS-DEBIAN-13-CVE-2022-4543 and 3 more.