Linux Kernel Vulnerability in rtase Affects Data Transmission Integrity

CVE-2026-74545

What is CVE-2026-74545?

A vulnerability exists in the Linux kernel within the rtase module, where a double-free condition can occur during the handling of DMA mapping failures. When the function rtase_start_xmit() encounters a failure after mapping all buffer fragments, the cleanup process improperly clears fragment descriptors. This results in the same skb being freed twice, which may lead to potential memory corruption or system instability. The vulnerability has been addressed by adjusting the error handling to ensure that the skb is only freed once, after clearing the fragment descriptors, thus enhancing the reliability of data transmission.

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