| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-46754: bpf: Remove tst_run from lwt_seg6local_prog_ops. |
| |
| 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. |
| |
| The Linux kernel CVE team has assigned CVE-2024-46754 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.18 with commit 004d4b274e2a1a895a0e5dc66158b90a7d463d44 and fixed in 6.10.10 with commit 9cd15511de7c619bbd0f54bb3f28e6e720ded5d6 |
| Issue introduced in 4.18 with commit 004d4b274e2a1a895a0e5dc66158b90a7d463d44 and fixed in 6.11 with commit c13fda93aca118b8e5cd202e339046728ee7dddb |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2024-46754 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| net/core/filter.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/9cd15511de7c619bbd0f54bb3f28e6e720ded5d6 |
| https://git.kernel.org/stable/c/c13fda93aca118b8e5cd202e339046728ee7dddb |
