CVE-2026-53230

HIGHPre-NVD 8.78.7—
EchelonGraph scoreHIGH confidence

Score 8.7 from GitHub Security Advisory (severity: HIGH) published 2026-06-25. a secondary CVSS source baseline 8.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.7
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.7Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

net/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list

mlx5_query_nic_vport_mac_list() sizes its firmware command buffer using the PF's log_max_current_uc/mc_list capabilities. When querying a VF vport with a larger configured max (via devlink), the firmware response can overflow this buffer:

BUG: KASAN: slab-out-of-bounds in mlx5_query_nic_vport_mac_list+0x453/0x4c0 [mlx5_core] Read of size 4 at addr ff1100013ffc8a12 by task kworker/u96:2/385

CPU: 12 UID: 0 PID: 385 Comm: kworker/u96:2 Not tainted 7.0.0-rc6+ #1 PREEMPT Hardware name: QEMU Standard PC (Q35 + ICH9, 2009) Workqueue: mlx5_esw_wq esw_vport_change_handler [mlx5_core] Call Trace: dump_stack_lvl+0x69/0xa0 print_report+0x176/0x4e4 kasan_report+0xc8/0x100 mlx5_query_nic_vport_mac_list+0x453/0x4c0 [mlx5_core] esw_update_vport_addr_list+0x2e3/0xda0 [mlx5_core] esw_vport_change_handle_locked+0xa1f/0x1060 [mlx5_core] esw_vport_change_handler+0x6a/0x90 [mlx5_core] process_one_work+0x87f/0x15e0 worker_thread+0x62b/0x1020 kthread+0x375/0x490 ret_from_fork+0x4dc/0x810 ret_from_fork_asm+0x11/0x20

Fix by querying the vport's own HCA caps to size the buffer correctly. Refactor the function to allocate and return the MAC list internally, removing the caller's dependency on knowing the correct max.

CVSS v3
8.7
EG Score
8.7(high)
EPSS
3.0%
KEV
Not listed

Published

June 25, 2026

Last Modified

July 2, 2026

Advisory Details (5)

Auto-updated Jun 28, 2026
No patch confirmed yet.
generic

net/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/894e036a24a26a6dd7b17d8d3fb5c53ab48a6074
generic

net/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/537d87784e81c3d7037525b99416455cee088cdc
generic

net/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/41781f2789309462520a93822e946521ed78f97f
generic

net/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2398e497389ed4be43f7cfbab499b49cec7dae1a
generic

net/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0f807764bb122fd63aa45f4229cb1ef2679fbd40

Vendor Advisories for CVE-2026-53230(2)

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

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 49× in last 7d / 61× 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.

  1. 2026-07-06 21:15 UTCEG score recompute
  2. 2026-07-06 21:15 UTCVendor advisory
  3. 2026-07-06 21:14 UTCGHSA enrichment
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 16:27 UTCEPSS rescore
  6. 2026-07-06 10:15 UTCEG score recompute
  7. 2026-07-06 10:15 UTCVendor advisory
  8. 2026-07-06 10:15 UTCGHSA enrichment
  9. 2026-07-06 02:23 UTCEPSS rescore
  10. 2026-07-06 02:23 UTCEPSS rescore
  11. 2026-07-05 23:12 UTCEG score recompute
  12. 2026-07-05 23:12 UTCVendor advisory
  13. 2026-07-05 23:12 UTCGHSA enrichment
  14. 2026-07-05 12:14 UTCEG score recompute
  15. 2026-07-05 12:14 UTCVendor advisory
  16. 2026-07-05 12:14 UTCGHSA enrichment
  17. 2026-07-05 01:15 UTCEG score recompute
  18. 2026-07-05 01:15 UTCVendor advisory
  19. 2026-07-05 01:15 UTCGHSA enrichment
  20. 2026-07-04 14:03 UTCEG score recompute
  21. 2026-07-04 14:03 UTCVendor advisory
  22. 2026-07-04 14:03 UTCGHSA enrichment
  23. 2026-07-04 06:31 UTCEPSS rescore
  24. 2026-07-04 06:31 UTCEPSS rescore
  25. 2026-07-04 02:58 UTCEG score recompute
Show 36 more
  1. 2026-07-04 02:58 UTCVendor advisory
  2. 2026-07-04 02:58 UTCGHSA enrichment
  3. 2026-07-03 15:55 UTCEG score recompute
  4. 2026-07-03 15:55 UTCVendor advisory
  5. 2026-07-03 15:55 UTCGHSA enrichment
  6. 2026-07-03 04:56 UTCEG score recompute
  7. 2026-07-03 04:56 UTCVendor advisory
  8. 2026-07-03 04:56 UTCGHSA enrichment
  9. 2026-07-02 17:59 UTCEG score recompute
  10. 2026-07-02 17:59 UTCVendor advisory
  11. 2026-07-02 17:59 UTCGHSA enrichment
  12. 2026-07-02 07:00 UTCEG score recompute
  13. 2026-07-02 07:00 UTCVendor advisory
  14. 2026-07-02 07:00 UTCGHSA enrichment
  15. 2026-07-01 20:00 UTCEG score recompute
  16. 2026-07-01 20:00 UTCVendor advisory
  17. 2026-07-01 20:00 UTCGHSA enrichment
  18. 2026-07-01 15:07 UTCEPSS rescore
  19. 2026-07-01 09:02 UTCEG score recompute
  20. 2026-07-01 09:02 UTCVendor advisory
  21. 2026-07-01 09:02 UTCGHSA enrichment
  22. 2026-06-30 22:04 UTCEG score recompute▲ 8.70
  23. 2026-06-30 22:04 UTCVendor advisory
  24. 2026-06-30 22:04 UTCGHSA enrichment
  25. 2026-06-29 14:06 UTCEPSS rescore
  26. 2026-06-29 14:06 UTCEPSS rescore
  27. 2026-06-28 14:07 UTCEPSS rescore
  28. 2026-06-28 07:52 UTCMITRE cvelistV5CVSS v3 → 8.7 · severity → HIGH
  29. 2026-06-28 04:56 UTCEPSS rescore
  30. 2026-06-28 04:56 UTCEPSS rescore
  31. 2026-06-28 04:06 UTCEG score recompute
  32. 2026-06-28 04:06 UTCGHSA enrichment
  33. 2026-06-27 03:08 UTCEPSS rescore
  34. 2026-06-25 13:49 UTCEPSS rescore
  35. 2026-06-25 10:06 UTCEG score recompute
  36. 2026-06-25 10:06 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-53230?
CVE-2026-53230 is a high vulnerability published on June 25, 2026. In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix slab-out-of-bounds in mlx5querynicvportmac_list mlx5querynicvportmac_list() sizes its firmware command buffer using the PF's logmaxcurrentuc/mclist capabilities. When querying a VF vport with a larger configured max…
When was CVE-2026-53230 disclosed?
CVE-2026-53230 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on July 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53230 actively exploited?
CVE-2026-53230 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-53230?
CVE-2026-53230 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-53230?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53230, 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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