CVE-2022-50580 blk-throttle: prevent overflow while calculating wait time
An integer overflow in the Linux kernel block throttle mechanism can lead to denial of service, requiring local access to exploit.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-50580?
CVE-2022-50580 is a vulnerability in Linux, published on 22 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:
blk-throttle: prevent overflow while calculating wait time
There is a problem found by code review in tg_with_in_bps_limit() that 'bps_limit * jiffy_elapsed_rnd' might overflow. Fix the problem by calling mul_u64_u64_div_u64() instead.
Which versions are affected by CVE-2022-50580?
How do I fix CVE-2022-50580?
Apply the vendor's patch.
Is CVE-2022-50580 being exploited?
There is no known exploitation of CVE-2022-50580 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2022-50580, GHSA-99r7-2gxr-89fw, UBUNTU-CVE-2022-50580.