What’s Vulnerable › Vulnerabilities

CVE-2024-46754: bpf: Remove tst_run from lwt_seg6local_prog_ops.

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-09-18 · updated 2026-09-02

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Remove tst_run from lwt_seg6local_prog_ops. The syzbot reported that the lwt_seg6 related BPF ops can be invoked via bpf_test_run() without without entering input_action_end_bpf() first. Martin KaFai Lau said that self test for BPF_PROG_TYPE_LWT_SEG6LOCAL probably didn't work since it was introduced in commit 04d4b274e2a ("ipv6: sr: Add seg6local action End.BPF"). The reason is that the per-CPU variable seg6_bpf_srh_states::srh is never assigned in the self test case but each BPF function expects it. Remove test_run for BPF_PROG_TYPE_LWT_SEG6LOCAL.

Affected products

• Linux kernel: from 4.18 before 6.10.10 — fixed in 6.10.10

How to fix

Upgrade to a fixed version: Linux kernel 6.10.10. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/9cd15511de7c619bbd0f54bb3f28e6e720ded5d6
• https://git.kernel.org/stable/c/a675524cfbe88fd49c05ff8807a08646983e687c
• https://git.kernel.org/stable/c/b05c2e25a5c168dbb46b6f7fcb741fd4e4f3b54a
• https://git.kernel.org/stable/c/c13fda93aca118b8e5cd202e339046728ee7dddb
• https://git.kernel.org/stable/c/e217492f6fa2228ad703ee3006d8fc4e5969fbd4
• https://git.kernel.org/stable/c/ea3fae6984ba0f054550e4da22219489c12cd8d4

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