CVE-2026-53074

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: reject short IPv4/IPv6 inputs in bpf_prog_test_run_skb bpf_prog_test_run_skb() calls eth_type_trans() first and then uses skb->protocol to initialize sk family and address fields for the test run. For IPv4 and IPv6 packets, it may access ip_hdr(skb) or ipv6_hdr(skb) even when the provided test input only contains an Ethernet header. Reject the input earlier if the Ethernet frame carries IPv4/IPv6 EtherType but the L3 header is too short. Fold the IPv4/IPv6 header length checks into the existing protocol switch and return -EINVAL before accessing the network headers.

References

• https://git.kernel.org/stable/c/0a04db240effd85773f66244645a28cedddb72d2
• https://git.kernel.org/stable/c/12bec2bd4b76d81c5d3996bd14ec1b7f4d983747
• https://git.kernel.org/stable/c/1f882c492d46f90bdb36f4936876c88c28dab21c
• https://git.kernel.org/stable/c/6a9f38d5ff11e00bc54baab752642978805e81eb
• https://git.kernel.org/stable/c/6def5fe753cbe5b279ee5fd10327b2611cbddaca