CVE-2022-48944

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux3869eecf050416a1d19bac60926f6b5d64b0aa58 < 3411613611a5cddf7e80908010dc87cb527dd13baffected
LinuxLinux4ef0c5c6b5ba1f38f0ea1cedad0cad722f00c14a < c65cfd89cef669d90c59f3bf150af6458137a04faffected
LinuxLinux4ef0c5c6b5ba1f38f0ea1cedad0cad722f00c14a < b1e8206582f9d680cff7d04828708c8b6ab32957affected
LinuxLinuxc85c6fadbef0a3eab41540ea628fa8fe8928c820affected
LinuxLinux25d40b828fb855ee62e1039c65a666c9afd60786affected
LinuxLinux5.15.3 < 5.15.27affected
LinuxLinux5.10.80 < 5.11affected
LinuxLinux5.14.19 < 5.15affected
LinuxLinux5.16affected
LinuxLinux0 < 5.16unaffected
LinuxLinux5.15.27 <= 5.15.*unaffected
LinuxLinux5.16.13 <= 5.16.*unaffected
LinuxLinux5.17 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References