CVE-2024-35884
CVE-2024-35884 is a vulnerability in the Linux kernel related to UDP packet handling within tunnels. Specifically, it addresses an issue where Generic Receive Offload (GRO) can improperly process tunneled UDP packets, potentially leading to packet corruption or kernel crashes. The Linux kernel vulnerability stems from improperly handling GSO packets in tunnel scenarios.
The vulnerability occurs when UDP packets, processed with rx-udp-gro-forwarding, are incorrectly GROed before entering a tunnel. This causes issues like incorrect offset adjustments and errors during fragmentation, leading to a variety of problems. The fix involves checks to ensure that GSO packets lacking the SKB_GSO_UDP_TUNNEL or SKB_GSO_CSUM bits are segmented when entering a tunnel. With a SVRS score of 30, the risk is moderate; while not requiring immediate action, it should be addressed in routine patching to prevent potential system instability and data corruption.
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