CVE-2024-27018

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2024-05-01. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

netfilter: br_netfilter: skip conntrack input hook for promisc packets

For historical reasons, when bridge device is in promisc mode, packets that are directed to the taps follow bridge input hook path. This patch adds a workaround to reset conntrack for these packets.

Jianbo Liu reports warning splats in their test infrastructure where cloned packets reach the br_netfilter input hook to confirm the conntrack object.

Scratch one bit from BR_INPUT_SKB_CB to annotate that this packet has reached the input hook because it is passed up to the bridge device to reach the taps.

[ 57.571874] WARNING: CPU: 1 PID: 0 at net/bridge/br_netfilter_hooks.c:616 br_nf_local_in+0x157/0x180 [br_netfilter] [ 57.572749] Modules linked in: xt_MASQUERADE nf_conntrack_netlink nfnetlink iptable_nat xt_addrtype xt_conntrack nf_nat br_netfilter rpcsec_gss_krb5 auth_rpcgss oid_registry overlay rpcrdma rdma_ucm ib_iser libiscsi scsi_transport_isc si ib_umad rdma_cm ib_ipoib iw_cm ib_cm mlx5_ib ib_uverbs ib_core mlx5ctl mlx5_core [ 57.575158] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.8.0+ #19 [ 57.575700] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 [ 57.576662] RIP: 0010:br_nf_local_in+0x157/0x180 [br_netfilter] [ 57.577195] Code: fe ff ff 41 bd 04 00 00 00 be 04 00 00 00 e9 4a ff ff ff be 04 00 00 00 48 89 ef e8 f3 a9 3c e1 66 83 ad b4 00 00 00 04 eb 91 <0f> 0b e9 f1 fe ff ff 0f 0b e9 df fe ff ff 48 89 df e8 b3 53 47 e1 [ 57.578722] RSP: 0018:ffff88885f845a08 EFLAGS: 00010202 [ 57.579207] RAX: 0000000000000002 RBX: ffff88812dfe8000 RCX: 0000000000000000 [ 57.579830] RDX: ffff88885f845a60 RSI: ffff8881022dc300 RDI: 0000000000000000 [ 57.580454] RBP: ffff88885f845a60 R08: 0000000000000001 R09: 0000000000000003 [ 57.581076] R10: 00000000ffff1300 R11: 0000000000000002 R12: 0000000000000000 [ 57.581695] R13: ffff8881047ffe00 R14: ffff888108dbee00 R15: ffff88814519b800 [ 57.582313] FS: 0000000000000000(0000) GS:ffff88885f840000(0000) knlGS:0000000000000000 [ 57.583040] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.583564] CR2: 000000c4206aa000 CR3: 0000000103847001 CR4: 0000000000370eb0 [ 57.584194] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 57.584820] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 57.585440] Call Trace: [ 57.585721] [ 57.585976] ? __warn+0x7d/0x130 [ 57.586323] ? br_nf_local_in+0x157/0x180 [br_netfilter] [ 57.586811] ? report_bug+0xf1/0x1c0 [ 57.587177] ? handle_bug+0x3f/0x70 [ 57.587539] ? exc_invalid_op+0x13/0x60 [ 57.587929] ? asm_exc_invalid_op+0x16/0x20 [ 57.588336] ? br_nf_local_in+0x157/0x180 [br_netfilter] [ 57.588825] nf_hook_slow+0x3d/0xd0 [ 57.589188] ? br_handle_vlan+0x4b/0x110 [ 57.589579] br_pass_frame_up+0xfc/0x150 [ 57.589970] ? br_port_flags_change+0x40/0x40 [ 57.590396] br_handle_frame_finish+0x346/0x5e0 [ 57.590837] ? ipt_do_table+0x32e/0x430 [ 57.591221] ? br_handle_local_finish+0x20/0x20 [ 57.591656] br_nf_hook_thresh+0x4b/0xf0 [br_netfilter] [ 57.592286] ? br_handle_local_finish+0x20/0x20 [ 57.592802] br_nf_pre_routing_finish+0x178/0x480 [br_netfilter] [ 57.593348] ? br_handle_local_finish+0x20/0x20 [ 57.593782] ? nf_nat_ipv4_pre_routing+0x25/0x60 [nf_nat] [ 57.594279] br_nf_pre_routing+0x24c/0x550 [br_netfilter] [ 57.594780] ? br_nf_hook_thresh+0xf0/0xf0 [br_netfilter] [ 57.595280] br_handle_frame+0x1f3/0x3d0 [ 57.595676] ? br_handle_local_finish+0x20/0x20 [ 57.596118] ? br_handle_frame_finish+0x5e0/0x5e0 [ 57.596566] __netif_receive_skb_core+0x25b/0xfc0 [ 57.597017] ? __napi_build_skb+0x37/0x40 [ 57.597418] __netif_receive_skb_list_core+0xfb/0x220

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
47%
KEV
Not listed

Published

May 1, 2024

Last Modified

August 5, 2026

Advisory Details (5)

Auto-updated Aug 4, 2026
No patch confirmed yet.
generic

netfilter: br_netfilter: skip conntrack input hook for promisc packets - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/dceb683ab87ca3666a9bb5c0158528b646faedc4
generic

netfilter: br_netfilter: skip conntrack input hook for promisc packets - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b13db0d16bc7b2a52abcf5cb71334f63faa5dbd6
generic

netfilter: br_netfilter: skip conntrack input hook for promisc packets - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/751de2012eafa4d46d8081056761fa0e9cc8a178
generic

netfilter: br_netfilter: skip conntrack input hook for promisc packets - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/43193174510ea4f3ce09b796e559a2fd9f148615
generic

netfilter: br_netfilter: skip conntrack input hook for promisc packets - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3f59ac29dea0921637053908fe99268d157bbb9d

Vendor Advisories for CVE-2024-27018(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(12)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.116.116) @ jammy2026-05-24ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.8.0-38.38) @ noble2026-05-24ubuntu
ubuntulinux-tools-nvidia-64k (6.8.0-1009.9) @ noble2026-05-24ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1065.73~20.04.1) @ focal2026-05-24ubuntu
ubuntulinux-tools-aws-edge (5.15.0.1065.71~20.04.1) @ focal2026-05-24ubuntu
ubuntulinux-tools-aws (6.8.0-1011.12) @ noble2026-05-24ubuntu
ubuntulinux-tools-azure-lts-22.04 (5.15.0.1068.66) @ jammy2026-05-24ubuntu
ubuntulinux-tools-oracle-64k (6.8.0-1008.8) @ noble2026-05-24ubuntu
ubuntulinux-xilinx-zynqmp-tools-host (5.15.0-1035.39) @ jammy2026-05-24ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1063.69~20.04.1) @ focal2026-05-24ubuntu
ubuntulinux-tools-aws-lts-22.04 (5.15.0.1065.65) @ jammy2026-05-24ubuntu
linuxKernel @ 5.15.157—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Additional Vendor Advisories

(11)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 13× in last 7d / 47× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 129 total refreshes for this CVE.

  1. 2026-08-06 13:45 UTCEPSS rescore
  2. 2026-08-05 19:15 UTCEPSS rescore
  3. 2026-08-05 12:17 UTCEG score recompute
  4. 2026-08-05 12:17 UTCVendor advisory
  5. 2026-08-05 12:17 UTCGHSA enrichment
  6. 2026-08-04 15:08 UTCEPSS rescore
  7. 2026-08-04 12:15 UTCEG score recompute
  8. 2026-08-04 12:15 UTCVendor advisory
  9. 2026-08-04 12:15 UTCGHSA enrichment
  10. 2026-08-04 10:36 UTCEPSS rescore
  11. 2026-08-03 10:34 UTCEPSS rescore
  12. 2026-08-02 02:25 UTCEPSS rescore
  13. 2026-08-02 02:25 UTCEPSS rescore
  14. 2026-08-01 05:36 UTCOSV refresh
  15. 2026-08-01 04:14 UTCEPSS rescore
  16. 2026-07-30 16:26 UTCEPSS rescore
  17. 2026-07-30 01:29 UTCEPSS rescore
  18. 2026-07-28 15:34 UTCEPSS rescore
  19. 2026-07-27 14:11 UTCEPSS rescore
  20. 2026-07-26 14:53 UTCEPSS rescore
  21. 2026-07-25 14:16 UTCEPSS rescore
  22. 2026-07-24 14:16 UTCEPSS rescore
  23. 2026-07-23 14:17 UTCEPSS rescore
  24. 2026-07-23 14:17 UTCEPSS rescore
  25. 2026-07-23 02:35 UTCEG score recompute
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  1. 2026-07-22 14:07 UTCEPSS rescore
  2. 2026-07-21 15:23 UTCEPSS rescore
  3. 2026-07-21 15:23 UTCEPSS rescore
  4. 2026-07-20 17:06 UTCEPSS rescore
  5. 2026-07-19 14:30 UTCEPSS rescore
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  7. 2026-07-19 02:28 UTCEPSS rescore
  8. 2026-07-19 02:28 UTCEPSS rescore
  9. 2026-07-18 10:03 UTCEPSS rescore
  10. 2026-07-18 10:03 UTCEPSS rescore
  11. 2026-07-15 16:56 UTCEPSS rescore
  12. 2026-07-15 16:56 UTCEPSS rescore
  13. 2026-07-15 01:59 UTCEPSS rescore
  14. 2026-07-15 01:59 UTCEPSS rescore
  15. 2026-07-14 12:40 UTCOSV refresh
  16. 2026-07-13 22:28 UTCEPSS rescore
  17. 2026-07-13 06:11 UTCEPSS rescore
  18. 2026-07-13 06:11 UTCEPSS rescore
  19. 2026-07-12 05:45 UTCEPSS rescore
  20. 2026-07-11 08:26 UTCEPSS rescore
  21. 2026-07-09 19:09 UTCEPSS rescore
  22. 2026-07-09 19:09 UTCEPSS rescore
  23. 2026-07-08 15:13 UTCEPSS rescore
  24. 2026-07-07 13:45 UTCEPSS rescore
  25. 2026-07-07 13:45 UTCEPSS rescore
  26. 2026-07-06 16:26 UTCEPSS rescore
  27. 2026-07-06 02:22 UTCEPSS rescore
  28. 2026-07-06 02:22 UTCEPSS rescore
  29. 2026-07-05 02:29 UTCEPSS rescore
  30. 2026-07-01 15:05 UTCEPSS rescore
  31. 2026-06-30 23:21 UTCEPSS rescore
  32. 2026-06-30 23:21 UTCEPSS rescore
  33. 2026-06-29 14:05 UTCEPSS rescore
  34. 2026-06-28 14:06 UTCEPSS rescore
  35. 2026-06-28 14:06 UTCEPSS rescore
  36. 2026-06-28 04:55 UTCEPSS rescore
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  38. 2026-06-27 03:07 UTCEPSS rescore
  39. 2026-06-27 03:07 UTCEPSS rescore
  40. 2026-06-26 13:09 UTCOSV refresh
  41. 2026-06-25 13:48 UTCEPSS rescore
  42. 2026-06-25 13:48 UTCEPSS rescore
  43. 2026-06-24 14:04 UTCEPSS rescore
  44. 2026-06-24 14:04 UTCEPSS rescore
  45. 2026-06-23 21:32 UTCEPSS rescore
  46. 2026-06-23 21:32 UTCEPSS rescore
  47. 2026-06-22 14:24 UTCEPSS rescore
  48. 2026-06-22 14:24 UTCEPSS rescore
  49. 2026-06-21 14:55 UTCEPSS rescore
  50. 2026-06-21 14:55 UTCEPSS rescore
  51. 2026-06-21 01:58 UTCEPSS rescore
  52. 2026-06-21 01:58 UTCEPSS rescore
  53. 2026-06-19 19:24 UTCEPSS rescore
  54. 2026-06-19 19:24 UTCEPSS rescore
  55. 2026-06-18 17:51 UTCEPSS rescore
  56. 2026-06-18 17:51 UTCEPSS rescore
  57. 2026-06-17 17:52 UTCEPSS rescore
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  59. 2026-06-16 17:51 UTCEPSS rescore
  60. 2026-06-16 17:51 UTCEPSS rescore
  61. 2026-06-15 17:47 UTCEPSS rescore
  62. 2026-06-14 23:16 UTCEPSS rescore
  63. 2026-06-13 22:59 UTCEPSS rescore
  64. 2026-06-13 22:59 UTCEPSS rescore
  65. 2026-06-12 23:11 UTCEPSS rescore
  66. 2026-06-11 13:59 UTCEPSS rescore
  67. 2026-06-11 13:59 UTCEPSS rescore
  68. 2026-06-10 22:17 UTCEPSS rescore
  69. 2026-06-10 13:21 UTCEPSS rescore
  70. 2026-06-10 13:21 UTCEPSS rescore
  71. 2026-06-08 20:11 UTCOSV refresh
  72. 2026-06-08 14:16 UTCEPSS rescore
  73. 2026-06-08 14:16 UTCEPSS rescore
  74. 2026-06-07 15:24 UTCEPSS rescore
  75. 2026-06-07 15:24 UTCEPSS rescore

Related CVEs(same product + same vendor)

Frequently asked(5)

What is CVE-2024-27018?
CVE-2024-27018 is a high vulnerability published on May 1, 2024. In the Linux kernel, the following vulnerability has been resolved: netfilter: br_netfilter: skip conntrack input hook for promisc packets For historical reasons, when bridge device is in promisc mode, packets that are directed to the taps follow bridge input hook path. This patch adds a workaround…
When was CVE-2024-27018 disclosed?
CVE-2024-27018 was first published in the National Vulnerability Database on May 1, 2024, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-27018 actively exploited?
CVE-2024-27018 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 53.0% of all scored CVEs.
What is the CVSS score of CVE-2024-27018?
CVE-2024-27018 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2024-27018?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-27018, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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