CVE-2025-39873

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The Linux kernel contains a flaw within the xilinx can module, specifically in the xcan write frame() function, leading to a use-after-free condition involving transmitted SKB (Socket Buffer) data. The can put echo skb() function acquires ownership of the SKB and may free it during or after its call. However, the xcan write frame() function continues to access the SKB after this point. The fix involves ensuring that can put echo skb() is called only after all operations on the SKB are completed. A previous attempt to address this issue did not fully resolve the problem.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.