CVE-2024-49968 ext4: filesystems without casefold feature cannot be mounted with siphash
A local attacker can cause a denial of service by mounting an ext4 filesystem with specific incompatible hash and casefold settings.
- 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-2024-49968?
CVE-2024-49968 is a medium-severity denial of service vulnerability in Linux kernel, published on 21 Oct 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:
ext4: filesystems without casefold feature cannot be mounted with siphash
When mounting the ext4 filesystem, if the default hash version is set to DX_HASH_SIPHASH but the casefold feature is not set, exit the mounting.
Which versions are affected by CVE-2024-49968?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-49968?
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-2024-49968 being exploited?
There is no known exploitation of CVE-2024-49968 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-52293, AZL-52344, BELL-CVE-2024-49968, DEBIAN-CVE-2024-49968, GHSA-x75j-gc7f-rqjc, ROOT-OS-DEBIAN-11-CVE-2024-49968 and 3 more.