CVE-2025-39940 dm-stripe: fix a possible integer overflow
An integer overflow in the Linux kernel's dm-stripe module can cause a denial of service when processing large chunk sizes.
- 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-2025-39940?
CVE-2025-39940 is a medium-severity vulnerability in Linux kernel, published on 4 Oct 2025. 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-stripe: fix a possible integer overflow
There's a possible integer overflow in stripe_io_hints if we have too large chunk size. Test if the overflow happened, and if it did, don't set limits->io_min and limits->io_opt;
Weakness: CWE-190
Which versions are affected by CVE-2025-39940?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-39940?
Apply the vendor's patch.
Is CVE-2025-39940 being exploited?
There is no known exploitation of CVE-2025-39940 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-68171, AZL-75167, BELL-CVE-2025-39940, DEBIAN-CVE-2025-39940, GHSA-pm83-264j-3jvx, ROOT-OS-DEBIAN-11-CVE-2025-39940 and 5 more.