CVE-2022-48944 sched: Fix yet more sched_fork() races
A race condition in the Linux kernel scheduler during fork operations can lead to privilege escalation or denial of service.
- 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-2022-48944?
CVE-2022-48944 is a medium-severity vulnerability in Linux kernel, published on 30 Aug 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:
sched: Fix yet more sched_fork() races
Where commit 4ef0c5c6b5ba ("kernel/sched: Fix sched_fork() access an invalid sched_task_group") fixed a fork race vs cgroup, it opened up a race vs syscalls by not placing the task on the runqueue before it gets exposed through the pidhash.
Commit 13765de8148f ("sched/fair: Fix fault in reweight_entity") is trying to fix a single instance of this, instead fix the whole class of issues, effectively reverting this commit.
Which versions are affected by CVE-2022-48944?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-48944?
Apply the vendor's patch.
Is CVE-2022-48944 being exploited?
There is no known exploitation of CVE-2022-48944 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-48944, GHSA-25gf-472p-pjv4, ROOT-OS-DEBIAN-11-CVE-2022-48944, UBUNTU-CVE-2022-48944.