CVE-2021-47596

Summary

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

net: hns3: fix use-after-free bug in hclgevf_send_mbx_msg

Currently, the hns3_remove function firstly uninstall client instance, and then uninstall acceletion engine device. The netdevice is freed in client instance uninstall process, but acceletion engine device uninstall process still use it to trace runtime information. This causes a use after free problem.

So fixes it by check the instance register state to avoid use after free.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxd8355240cf8fb8b9e002b5c8458578435cea85c2 < 12512bc8f25b8ba9795dfbae0e9ca57ff13fd542affected
LinuxLinuxd8355240cf8fb8b9e002b5c8458578435cea85c2 < 4f4a353f6fe033807cd026a5de81c67469ff19b0affected
LinuxLinuxd8355240cf8fb8b9e002b5c8458578435cea85c2 < 27cbf64a766e86f068ce6214f04c00ceb4db1af4affected
LinuxLinux5.8affected
LinuxLinux0 < 5.8unaffected
LinuxLinux5.10.88 <= 5.10.*unaffected
LinuxLinux5.15.11 <= 5.15.*unaffected
LinuxLinux5.16 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

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

References