What’s Vulnerable › Vulnerabilities

CVE-2022-48944: sched: Fix yet more sched_fork() races

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-08-30 · updated 2026-06-17

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.

Affected products

• Linux kernel: from 5.15.3 before 5.15.27; from 5.16 before 5.16.13; 5.10.80, 5.14.19 — fixed in 5.15.27, 5.16.13

How to fix

Upgrade to a fixed version: Linux kernel 5.15.27, 5.16.13. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3411613611a5cddf7e80908010dc87cb527dd13b
• https://git.kernel.org/stable/c/b1e8206582f9d680cff7d04828708c8b6ab32957
• https://git.kernel.org/stable/c/c65cfd89cef669d90c59f3bf150af6458137a04f

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