CVE-2024-46754

bpf: Remove tst_run from lwt_seg6local_prog_ops.

State: Published
Severity: 7.8 High
Published: Sep 18, 2024
Updated: Sep 2, 2026
Reserved: Sep 11, 2024

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	004d4b274e2a1a895a0e5dc66158b90a7d463d44 to before ea3fae6984ba0f054550e4da22219489c12cd8d4Affected 004d4b274e2a1a895a0e5dc66158b90a7d463d44 to before a675524cfbe88fd49c05ff8807a08646983e687cAffected 004d4b274e2a1a895a0e5dc66158b90a7d463d44 to before b05c2e25a5c168dbb46b6f7fcb741fd4e4f3b54aAffected 004d4b274e2a1a895a0e5dc66158b90a7d463d44 to before e217492f6fa2228ad703ee3006d8fc4e5969fbd4Affected 004d4b274e2a1a895a0e5dc66158b90a7d463d44 to before 9cd15511de7c619bbd0f54bb3f28e6e720ded5d6Affected 004d4b274e2a1a895a0e5dc66158b90a7d463d44 to before c13fda93aca118b8e5cd202e339046728ee7dddbAffected
LinuxLinux	4.18Affected before 4.18Not affected 5.10.269 through 5.10.Not affected 5.15.220 through 5.15.Not affected 6.1.187 through 6.1.Not affected 6.6.156 through 6.6.Not affected 6.10.10 through 6.10.*Not affected 6.11 and laterNot affected

Product

Versions

LinuxLinux

004d4b274e2a1a895a0e5dc66158b90a7d463d44 to before ea3fae6984ba0f054550e4da22219489c12cd8d4Affected
004d4b274e2a1a895a0e5dc66158b90a7d463d44 to before a675524cfbe88fd49c05ff8807a08646983e687cAffected
004d4b274e2a1a895a0e5dc66158b90a7d463d44 to before b05c2e25a5c168dbb46b6f7fcb741fd4e4f3b54aAffected
004d4b274e2a1a895a0e5dc66158b90a7d463d44 to before e217492f6fa2228ad703ee3006d8fc4e5969fbd4Affected
004d4b274e2a1a895a0e5dc66158b90a7d463d44 to before 9cd15511de7c619bbd0f54bb3f28e6e720ded5d6Affected
004d4b274e2a1a895a0e5dc66158b90a7d463d44 to before c13fda93aca118b8e5cd202e339046728ee7dddbAffected

LinuxLinux

4.18Affected
before 4.18Not affected
5.10.269 through 5.10.*Not affected
5.15.220 through 5.15.*Not affected
6.1.187 through 6.1.*Not affected
6.6.156 through 6.6.*Not affected
6.10.10 through 6.10.*Not affected
6.11 and laterNot affected

References

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