CVE-2021-47064

Summary

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

mt76: fix potential DMA mapping leak

With buf uninitialized in mt76_dma_tx_queue_skb_raw, its field skip_unmap could potentially inherit a non-zero value from stack garbage. If this happens, it will cause DMA mappings for MCU command frames to not be unmapped after completion

Affected Software

VendorProductVersion RangeStatus
LinuxLinux27d5c528a7ca08dcd44877fdd9fc08b76630bf77 < 9fa26701cd1fc4d932d431971efc5746325bdfceaffected
LinuxLinux27d5c528a7ca08dcd44877fdd9fc08b76630bf77 < 9b68ce2856dadc0e1cb6fd21fbeb850da49efd08affected
LinuxLinux27d5c528a7ca08dcd44877fdd9fc08b76630bf77 < 91b9548d413fda488ea853cd1b9f59b572db3a0caffected
LinuxLinux27d5c528a7ca08dcd44877fdd9fc08b76630bf77 < b4403cee6400c5f679e9c4a82b91d61aa961eccfaffected
LinuxLinux5.10affected
LinuxLinux0 < 5.10unaffected
LinuxLinux5.10.37 <= 5.10.*unaffected
LinuxLinux5.11.21 <= 5.11.*unaffected
LinuxLinux5.12.4 <= 5.12.*unaffected
LinuxLinux5.13 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References