CVE-2021-47616

Summary

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

RDMA: Fix use-after-free in rxe_queue_cleanup

On error handling path in rxe_qp_from_init() qp->sq.queue is freed and then rxe_create_qp() will drop last reference to this object. qp clean up function will try to free this queue one time and it causes UAF bug.

Fix it by zeroing queue pointer after freeing queue in rxe_qp_from_init().

Affected Software

VendorProductVersion RangeStatus
LinuxLinux514aee660df493cd673154a6ba6bab745ec47b8c < acb53e47db1fbc7cd37ab10b46388f045a76e383affected
LinuxLinux514aee660df493cd673154a6ba6bab745ec47b8c < 84b01721e8042cdd1e8ffeb648844a09cd4213e0affected
LinuxLinux5.15affected
LinuxLinux0 < 5.15unaffected
LinuxLinux5.15.10 <= 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