CVE-2021-47669

can: vxcan: vxcan_xmit: fix use after free bug

CVSS 7.8 HIGHEPSS 0.2%CWE-416

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.8EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

17 Apr 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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().

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Linux · Linux

References

https://git.kernel.org/stable/c/6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105 https://git.kernel.org/stable/c/75854cad5d80976f6ea0f0431f8cedd3bcc475cb https://git.kernel.org/stable/c/9b820875a32a3443d67bfd368e93038354e98052 https://git.kernel.org/stable/c/a24476b37167816e6352ca1a2cf3769847774f70 https://git.kernel.org/stable/c/e771a874076115df8bff27d325edfd2340e4ec69