CVE-2021-47670

Summary

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

can: peak_usb: fix use after free bugs

After calling peak_usb_netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the can_frame cf which aliases skb memory is accessed after the peak_usb_netif_rx_ni().

Reordering the lines solves the issue.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux0a25e1f4f18566b750ebd3ae995af64e23111e63 < 5408824636fa0dfedb9ecb0d94abd573131bfbbeaffected
LinuxLinux0a25e1f4f18566b750ebd3ae995af64e23111e63 < ddd1416f44130377798c1430b76503513b7497c2affected
LinuxLinux0a25e1f4f18566b750ebd3ae995af64e23111e63 < ec939c13c3fff2114479769c8380b7f1a54feca9affected
LinuxLinux0a25e1f4f18566b750ebd3ae995af64e23111e63 < 50aca891d7a554db0901b245167cd653d73aaa71affected
LinuxLinux4.0affected
LinuxLinux0 < 4.0unaffected
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