CVE-2023-52526 erofs: fix memory leak of LZMA global compressed deduplication
A memory leak in the Linux kernel EROFS filesystem with global compressed deduplication enabled can lead to unexpected out-of-memory conditions and denial of service.
- 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-2023-52526?
CVE-2023-52526 is a medium-severity denial of service vulnerability in Linux kernel, published on 2 Mar 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
erofs: fix memory leak of LZMA global compressed deduplication
When stressing microLZMA EROFS images with the new global compressed deduplication feature enabled (`-Ededupe`), I found some short-lived temporary pages weren't properly released, which could slowly cause unexpected OOMs hours later.
Let's fix it now (LZ4 and DEFLATE don't have this issue.)
Weakness: CWE-401
Which versions are affected by CVE-2023-52526?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-52526?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-52526 being exploited?
There is no known exploitation of CVE-2023-52526 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2023-52526, DEBIAN-CVE-2023-52526, GHSA-xc3g-cm27-mcmg, UBUNTU-CVE-2023-52526.