CVE-2021-47671

Summary

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

can: etas_es58x: es58x_rx_err_msg(): fix memory leak in error path

In es58x_rx_err_msg(), if can->do_set_mode() fails, the function directly returns without calling netif_rx(skb). This means that the skb previously allocated by alloc_can_err_skb() is not freed. In other terms, this is a memory leak.

This patch simply removes the return statement in the error branch and let the function continue.

Issue was found with GCC -fanalyzer, please follow the link below for details.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux8537257874e949a59c834cecfd5a063e11b64b0b < 4f389e1276a5389c92cef860c9fde8e1c802a871affected
LinuxLinux8537257874e949a59c834cecfd5a063e11b64b0b < 7eb0881aec26099089f12ae850aebd93190b1dfeaffected
LinuxLinux8537257874e949a59c834cecfd5a063e11b64b0b < d9447f768bc8c60623e4bb3ce65b8f4654d33a50affected
LinuxLinux5.13affected
LinuxLinux0 < 5.13unaffected
LinuxLinux5.14.19 <= 5.14.*unaffected
LinuxLinux5.15.3 <= 5.15.*unaffected
LinuxLinux5.16 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

References