CVE-2021-47670

can: peak_usb: fix use after free bugs

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: 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.

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/50aca891d7a554db0901b245167cd653d73aaa71 https://git.kernel.org/stable/c/5408824636fa0dfedb9ecb0d94abd573131bfbbe https://git.kernel.org/stable/c/ddd1416f44130377798c1430b76503513b7497c2 https://git.kernel.org/stable/c/ec939c13c3fff2114479769c8380b7f1a54feca9