CVE-2026-53074

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxfa5cb548ced61b9d3095f32f8a7e427a248c65ee < 7254267799d083280c0e53effc101a33add95f7baffected
LinuxLinuxfa5cb548ced61b9d3095f32f8a7e427a248c65ee < 6a9f38d5ff11e00bc54baab752642978805e81ebaffected
LinuxLinuxfa5cb548ced61b9d3095f32f8a7e427a248c65ee < e6aa481f21fc7a41ed344767ea25aae9d03fae71affected
LinuxLinuxfa5cb548ced61b9d3095f32f8a7e427a248c65ee < 0a04db240effd85773f66244645a28cedddb72d2affected
LinuxLinuxfa5cb548ced61b9d3095f32f8a7e427a248c65ee < 1f882c492d46f90bdb36f4936876c88c28dab21caffected
LinuxLinuxfa5cb548ced61b9d3095f32f8a7e427a248c65ee < 8042240412de3222d27b31e89d29336961cad9e4affected
LinuxLinuxfa5cb548ced61b9d3095f32f8a7e427a248c65ee < 6def5fe753cbe5b279ee5fd10327b2611cbddacaaffected
LinuxLinuxfa5cb548ced61b9d3095f32f8a7e427a248c65ee < 12bec2bd4b76d81c5d3996bd14ec1b7f4d983747affected
LinuxLinux5.9affected
LinuxLinux0 < 5.9unaffected
LinuxLinux5.10.258 <= 5.10.*unaffected
LinuxLinux5.15.209 <= 5.15.*unaffected
LinuxLinux6.1.175 <= 6.1.*unaffected
LinuxLinux6.6.141 <= 6.6.*unaffected
LinuxLinux6.12.91 <= 6.12.*unaffected
LinuxLinux6.18.33 <= 6.18.*unaffected
LinuxLinux7.0.10 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References