CVE-2022-50749 acct: fix potential integer overflow in encode_comp_t()
A local attacker can trigger an integer overflow in the Linux kernel accounting subsystem, potentially causing a denial of service.
- 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-2022-50749?
CVE-2022-50749 is a vulnerability in Linux, published on 24 Dec 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:
acct: fix potential integer overflow in encode_comp_t()
The integer overflow is descripted with following codes: > 317 static comp_t encode_comp_t(u64 value) > 318 { > 319 int exp, rnd; ...... > 341 exp <<= MANTSIZE; > 342 exp += value; > 343 return exp; > 344 }
Currently comp_t is defined as type of '__u16', but the variable 'exp' is type of 'int', so overflow would happen when variable 'exp' in line 343 is greater than 65535.
Which versions are affected by CVE-2022-50749?
How do I fix CVE-2022-50749?
Apply the vendor's patch.
Is CVE-2022-50749 being exploited?
There is no known exploitation of CVE-2022-50749 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2022-50749, GHSA-xpg5-5j2p-2g3r, UBUNTU-CVE-2022-50749.