CVE-2024-26860 dm-integrity: fix a memory leak when rechecking the data
A memory leak in the Linux kernel dm-integrity module allows attackers to cause denial of service by triggering repeated data rechecks after checksum failures.
- 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-2024-26860?
CVE-2024-26860 is a medium-severity denial of service vulnerability in Linux kernel, published on 17 Apr 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:
dm-integrity: fix a memory leak when rechecking the data
Memory for the "checksums" pointer will leak if the data is rechecked after checksum failure (because the associated kfree won't happen due to 'goto skip_io').
Fix this by freeing the checksums memory before recheck, and just use the "checksum_onstack" memory for storing checksum during recheck.
Weakness: CWE-401
Which versions are affected by CVE-2024-26860?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-26860?
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-2024-26860 being exploited?
There is no known exploitation of CVE-2024-26860 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-26860, DEBIAN-CVE-2024-26860, GHSA-h5px-p7wm-gqpv, UBUNTU-CVE-2024-26860.