CVE-2022-49806

Summary

In the Linux kernel, the following vulnerability has been resolved:

net: microchip: sparx5: Fix potential null-ptr-deref in sparx_stats_init() and sparx5_start()

sparx_stats_init() calls create_singlethread_workqueue() and not checked the ret value, which may return NULL. And a null-ptr-deref may happen:

sparx_stats_init() create_singlethread_workqueue() # failed, sparx5->stats_queue is NULL queue_delayed_work() queue_delayed_work_on() __queue_delayed_work() # warning here, but continue __queue_work() # access wq->flags, null-ptr-deref

Check the ret value and return -ENOMEM if it is NULL. So as sparx5_start().

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxb37a1bae742f92cc9b1f777d54e04ee3d86bbfc2 < 80e590aeb132887102c3fa79d99b338f099dc952affected
LinuxLinuxb37a1bae742f92cc9b1f777d54e04ee3d86bbfc2 < 456327e565dc49d18b2f595f39f47df8a36f1057affected
LinuxLinuxb37a1bae742f92cc9b1f777d54e04ee3d86bbfc2 < 639f5d006e36bb303f525d9479448c412b720c39affected
LinuxLinux5.14affected
LinuxLinux0 < 5.14unaffected
LinuxLinux5.15.80 <= 5.15.*unaffected
LinuxLinux6.0.10 <= 6.0.*unaffected
LinuxLinux6.1 <= *unaffected

Weaknesses

References