CVE-2022-49711

Summary

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

bus: fsl-mc-bus: fix KASAN use-after-free in fsl_mc_bus_remove()

In fsl_mc_bus_remove(), mc->root_mc_bus_dev->mc_io is passed to fsl_destroy_mc_io(). However, mc->root_mc_bus_dev is already freed in fsl_mc_device_remove(). Then reference to mc->root_mc_bus_dev->mc_io triggers KASAN use-after-free. To avoid the use-after-free, keep the reference to mc->root_mc_bus_dev->mc_io in a local variable and pass to fsl_destroy_mc_io().

This patch needs rework to apply to kernels older than v5.15.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxf93627146f0e371093966ed3d44c065aa077cfb1 < 720ab105df7bf3eee62d2bddd41526b29d07d045affected
LinuxLinuxf93627146f0e371093966ed3d44c065aa077cfb1 < ccd1751092341ac120a961835211f9f2e3735963affected
LinuxLinuxf93627146f0e371093966ed3d44c065aa077cfb1 < 161b68b0a728377aaa10a8e14c70e7734f3c9ff7affected
LinuxLinuxf93627146f0e371093966ed3d44c065aa077cfb1 < 928ea98252ad75118950941683893cf904541da9affected
LinuxLinux4.8affected
LinuxLinux0 < 4.8unaffected
LinuxLinux5.10.248 <= 5.10.*unaffected
LinuxLinux5.15.49 <= 5.15.*unaffected
LinuxLinux5.18.6 <= 5.18.*unaffected
LinuxLinux5.19 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

References