CVE-2021-47519

Summary

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

can: m_can: m_can_read_fifo: fix memory leak in error branch

In m_can_read_fifo(), if the second call to m_can_fifo_read() fails, the function jump to the out_fail label and returns without calling m_can_receive_skb(). This means that the skb previously allocated by alloc_can_skb() is not freed. In other terms, this is a memory leak.

This patch adds a goto label to destroy the skb if an error occurs.

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

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxe39381770ec9ca3c51d8b9bd9cc6e01d78ea974a < 75a422165477dd12d2d20aa7c9ee7c9a281c9908affected
LinuxLinuxe39381770ec9ca3c51d8b9bd9cc6e01d78ea974a < 31cb32a590d62b18f69a9a6d433f4e69c74fdd56affected
LinuxLinux5.15affected
LinuxLinux0 < 5.15unaffected
LinuxLinux5.15.8 <= 5.15.*unaffected
LinuxLinux5.16 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

CVE Program Container

Additional References

References