CVE-2021-47669

Summary

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

can: vxcan: vxcan_xmit: fix use after free bug

After calling netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the canfd_frame cfd which aliases skb memory is accessed after the netif_rx_ni().

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxa8f820a380a2a06fc4fe1a54159067958f800929 < 6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105affected
LinuxLinuxa8f820a380a2a06fc4fe1a54159067958f800929 < 9b820875a32a3443d67bfd368e93038354e98052affected
LinuxLinuxa8f820a380a2a06fc4fe1a54159067958f800929 < a24476b37167816e6352ca1a2cf3769847774f70affected
LinuxLinuxa8f820a380a2a06fc4fe1a54159067958f800929 < e771a874076115df8bff27d325edfd2340e4ec69affected
LinuxLinuxa8f820a380a2a06fc4fe1a54159067958f800929 < 75854cad5d80976f6ea0f0431f8cedd3bcc475cbaffected
LinuxLinux4.12affected
LinuxLinux0 < 4.12unaffected
LinuxLinux4.14.218 <= 4.14.*unaffected
LinuxLinux4.19.171 <= 4.19.*unaffected
LinuxLinux5.4.93 <= 5.4.*unaffected
LinuxLinux5.10.11 <= 5.10.*unaffected
LinuxLinux5.11 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

References