CVE-2026-53074
bpf: reject short IPv4/IPv6 inputs in bpf_prog_test_run_skb
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
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.
Timeline
- CVE published
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
5.9
References 8
git.kernel.org
- stable/c/7254267799d083280c0e53effc101a33add95f7b
- stable/c/6a9f38d5ff11e00bc54baab752642978805e81eb
- stable/c/e6aa481f21fc7a41ed344767ea25aae9d03fae71
- stable/c/0a04db240effd85773f66244645a28cedddb72d2
- stable/c/1f882c492d46f90bdb36f4936876c88c28dab21c
- stable/c/8042240412de3222d27b31e89d29336961cad9e4
- stable/c/6def5fe753cbe5b279ee5fd10327b2611cbddaca
- stable/c/12bec2bd4b76d81c5d3996bd14ec1b7f4d983747