CVE-2026-53230

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

Score 8.7 from GitHub Security Advisory (severity: HIGH) published 2026-06-25. the CNA's CVSS baseline 8.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.7Exploit: None knownExposed: 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(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity87% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

June 25, 2026

Last Modified

August 5, 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.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 7.2~rc5-1~exp1 (496 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 7.2~rc7-1~exp1 (350 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.94-1~bpo12+1 (27 versions)6.12.94-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (145 versions)7.0.13-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 86× 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 299 total refreshes for this CVE.

  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-10 09:35 UTCEPSS rescore
  3. 2026-09-08 22:01 UTCEPSS rescore
  4. 2026-09-07 16:01 UTCEPSS rescore
  5. 2026-09-06 13:47 UTCEPSS rescore
  6. 2026-09-04 05:06 UTCEPSS rescore
  7. 2026-09-02 14:12 UTCEPSS rescore
  8. 2026-09-01 13:54 UTCEPSS rescore
  9. 2026-08-30 19:37 UTCEG score recompute
  10. 2026-08-30 19:37 UTCVendor advisory
  11. 2026-08-30 19:37 UTCGHSA enrichment
  12. 2026-08-30 19:17 UTCEPSS rescore
  13. 2026-08-30 01:22 UTCEPSS rescore
  14. 2026-08-28 21:41 UTCEPSS rescore
  15. 2026-08-27 23:57 UTCEG score recompute
  16. 2026-08-27 23:57 UTCVendor advisory
  17. 2026-08-27 23:57 UTCGHSA enrichment
  18. 2026-08-27 14:25 UTCEPSS rescore
  19. 2026-08-26 14:46 UTCEPSS rescore
  20. 2026-08-25 13:49 UTCEPSS rescore
  21. 2026-08-25 00:11 UTCEG score recompute
  22. 2026-08-25 00:11 UTCVendor advisory
  23. 2026-08-25 00:10 UTCGHSA enrichment
  24. 2026-08-24 13:12 UTCEG score recompute
  25. 2026-08-24 13:12 UTCVendor advisory
Show 75 more
  1. 2026-08-24 13:12 UTCGHSA enrichment
  2. 2026-08-23 20:23 UTCVendor advisory
  3. 2026-08-23 20:23 UTCGHSA enrichment
  4. 2026-08-23 09:25 UTCEG score recompute
  5. 2026-08-23 09:25 UTCVendor advisory
  6. 2026-08-23 09:25 UTCGHSA enrichment
  7. 2026-08-23 00:19 UTCEPSS rescore
  8. 2026-08-22 22:27 UTCVendor advisory
  9. 2026-08-22 22:27 UTCGHSA enrichment
  10. 2026-08-22 10:40 UTCEG score recompute
  11. 2026-08-22 10:40 UTCVendor advisory
  12. 2026-08-22 10:40 UTCGHSA enrichment
  13. 2026-08-21 23:49 UTCEPSS rescore
  14. 2026-08-21 17:26 UTCGHSA enrichment
  15. 2026-08-21 05:09 UTCEG score recompute
  16. 2026-08-21 05:09 UTCVendor advisory
  17. 2026-08-21 05:09 UTCGHSA enrichment
  18. 2026-08-20 22:55 UTCEPSS rescore
  19. 2026-08-20 18:03 UTCVendor advisory
  20. 2026-08-20 18:03 UTCGHSA enrichment
  21. 2026-08-20 07:05 UTCEG score recompute
  22. 2026-08-20 07:05 UTCVendor advisory
  23. 2026-08-20 07:05 UTCGHSA enrichment
  24. 2026-08-19 17:04 UTCEPSS rescore
  25. 2026-08-19 12:40 UTCVendor advisory
  26. 2026-08-19 12:40 UTCGHSA enrichment
  27. 2026-08-19 01:31 UTCEG score recompute
  28. 2026-08-19 01:31 UTCVendor advisory
  29. 2026-08-19 01:31 UTCGHSA enrichment
  30. 2026-08-18 13:48 UTCEPSS rescore
  31. 2026-08-17 13:47 UTCEPSS rescore
  32. 2026-08-17 11:49 UTCVendor advisory
  33. 2026-08-17 11:49 UTCGHSA enrichment
  34. 2026-08-17 00:44 UTCEG score recompute
  35. 2026-08-17 00:44 UTCVendor advisory
  36. 2026-08-17 00:44 UTCGHSA enrichment
  37. 2026-08-16 14:56 UTCEPSS rescore
  38. 2026-08-16 13:46 UTCVendor advisory
  39. 2026-08-16 13:46 UTCGHSA enrichment
  40. 2026-08-16 02:48 UTCEG score recompute
  41. 2026-08-16 02:48 UTCVendor advisory
  42. 2026-08-16 02:48 UTCGHSA enrichment
  43. 2026-08-16 02:14 UTCEPSS rescore
  44. 2026-08-15 15:50 UTCVendor advisory
  45. 2026-08-15 15:50 UTCGHSA enrichment
  46. 2026-08-15 04:50 UTCEG score recompute
  47. 2026-08-15 04:50 UTCVendor advisory
  48. 2026-08-15 04:50 UTCGHSA enrichment
  49. 2026-08-15 01:30 UTCEPSS rescore
  50. 2026-08-14 17:52 UTCVendor advisory
  51. 2026-08-14 17:52 UTCGHSA enrichment
  52. 2026-08-14 06:36 UTCEG score recompute
  53. 2026-08-14 06:36 UTCVendor advisory
  54. 2026-08-14 06:36 UTCGHSA enrichment
  55. 2026-08-13 22:00 UTCEPSS rescore
  56. 2026-08-13 19:38 UTCVendor advisory
  57. 2026-08-13 19:38 UTCGHSA enrichment
  58. 2026-08-13 08:40 UTCVendor advisory
  59. 2026-08-13 08:40 UTCGHSA enrichment
  60. 2026-08-12 21:42 UTCEG score recompute
  61. 2026-08-12 21:42 UTCGHSA enrichment
  62. 2026-08-12 13:51 UTCEPSS rescore
  63. 2026-08-12 10:45 UTCVendor advisory
  64. 2026-08-12 10:45 UTCGHSA enrichment
  65. 2026-08-11 23:47 UTCEG score recompute
  66. 2026-08-11 23:47 UTCVendor advisory
  67. 2026-08-11 23:47 UTCGHSA enrichment
  68. 2026-08-11 12:49 UTCVendor advisory
  69. 2026-08-11 12:49 UTCGHSA enrichment
  70. 2026-08-11 01:51 UTCEG score recompute
  71. 2026-08-11 01:51 UTCVendor advisory
  72. 2026-08-11 01:51 UTCGHSA enrichment
  73. 2026-08-11 00:00 UTCEPSS rescore
  74. 2026-08-10 14:53 UTCGHSA enrichment
  75. 2026-08-10 03:54 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 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-2026-53230 actively exploited?
CVE-2026-53230 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 97.5% of all scored CVEs.
What is the CVSS score of CVE-2026-53230?
CVE-2026-53230 has a CVSS v4.0 base score of 8.7 (CNA self-assessment; NVD's own analysis pending).
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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