ghsa-crwm-whhx-38v8
Vulnerability from github
Published
2024-09-18 09:30
Modified
2024-09-18 09:30
Details

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.

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{
   affected: [],
   aliases: [
      "CVE-2024-46754",
   ],
   database_specific: {
      cwe_ids: [],
      github_reviewed: false,
      github_reviewed_at: null,
      nvd_published_at: "2024-09-18T08:15:04Z",
      severity: null,
   },
   details: "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Remove tst_run from lwt_seg6local_prog_ops.\n\nThe syzbot reported that the lwt_seg6 related BPF ops can be invoked\nvia bpf_test_run() without without entering input_action_end_bpf()\nfirst.\n\nMartin KaFai Lau said that self test for BPF_PROG_TYPE_LWT_SEG6LOCAL\nprobably didn't work since it was introduced in commit 04d4b274e2a\n(\"ipv6: sr: Add seg6local action End.BPF\"). The reason is that the\nper-CPU variable seg6_bpf_srh_states::srh is never assigned in the self\ntest case but each BPF function expects it.\n\nRemove test_run for BPF_PROG_TYPE_LWT_SEG6LOCAL.",
   id: "GHSA-crwm-whhx-38v8",
   modified: "2024-09-18T09:30:37Z",
   published: "2024-09-18T09:30:37Z",
   references: [
      {
         type: "ADVISORY",
         url: "https://nvd.nist.gov/vuln/detail/CVE-2024-46754",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/9cd15511de7c619bbd0f54bb3f28e6e720ded5d6",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/c13fda93aca118b8e5cd202e339046728ee7dddb",
      },
   ],
   schema_version: "1.4.0",
   severity: [],
}


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