CVE-2024-53147 exfat: fix out-of-bounds access of directory entries
A local attacker can trigger an out-of-bounds access in the Linux kernel exFAT driver via a corrupted filesystem, causing system crashes or data corruption.
- 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-2024-53147?
CVE-2024-53147 is a high-severity memory corruption vulnerability in Linux kernel, published on 24 Dec 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:
exfat: fix out-of-bounds access of directory entries
In the case of the directory size is greater than or equal to the cluster size, if start_clu becomes an EOF cluster(an invalid cluster) due to file system corruption, then the directory entry where ei->hint_femp.eidx hint is outside the directory, resulting in an out-of-bounds access, which may cause further file system corruption.
This commit adds a check for start_clu, if it is an invalid cluster, the file or directory will be treated as empty.
Weakness: CWE-125
Which versions are affected by CVE-2024-53147?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-53147?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2024-53147 being exploited?
There is no known exploitation of CVE-2024-53147 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-53147, DEBIAN-CVE-2024-53147, GHSA-26x9-cxwc-jfqw, ROOT-OS-DEBIAN-11-CVE-2024-53147, ROOT-OS-DEBIAN-12-CVE-2024-53147, ROOT-OS-UBUNTU-2204-CVE-2024-53147 and 1 more.