CVE-2026-46181

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-28. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

A fix is available — apply it.

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

RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event()

Sashiko points out the radix_tree itself is RCU safe, but nothing ever frees the mlx4_srq struct with RCU, and it isn't even accessed within the RCU critical section. It also will crash if an event is delivered before the srq object is finished initializing.

Use the spinlock since it isn't easy to make RCU work, use refcount_inc_not_zero() to protect against partially initialized objects, and order the refcount_set() to be after the srq is fully initialized.

CVSS v3
7.8
EG Score
7.8(medium)
EPSS
1.7%
KEV
Not listed

Published

May 28, 2026

Last Modified

July 15, 2026

Advisory Details (3)

Auto-updated Jun 3, 2026
No patch confirmed yet.
generic

RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c9341307ea16b9395c2e4c9c94d8499d91fe31d0
generic

RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8b7833f3bce35cb0d01c1503781523c099c675f0
generic

RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1e2a44875b6afb4add1115f7f3351dcbeb6f273d

Vendor Advisories for CVE-2026-46181(13)

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

Patch Availability(11)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatkernel-0:3.10.0-1160.155.1.el72026-07-07redhat
redhatkernel-0:4.18.0-305.197.1.el8_42026-07-06redhat
redhatkernel-0:4.18.0-477.150.1.el8_82026-07-06redhat
redhatkernel-0:4.18.0-372.199.1.el8_62026-07-06redhat
redhatkernel-0:5.14.0-570.125.1.el9_62026-07-01redhat
redhatkernel-0:5.14.0-284.178.1.el9_22026-07-01redhat
redhatkernel-rt-0:5.14.0-284.178.1.rt14.463.el9_22026-07-01redhat
redhatkernel-0:5.14.0-427.135.1.el9_42026-07-01redhat
redhatkernel-0:5.14.0-687.15.1.el9_82026-06-11redhat
redhatkernel-0:4.18.0-553.132.1.el8_102026-06-10redhat
redhatkernel-rt-0:4.18.0-553.132.1.rt7.473.el8_102026-06-10redhat

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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 87× 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 187 total refreshes for this CVE.

  1. 2026-07-13 22:30 UTCEPSS rescore
  2. 2026-07-13 06:13 UTCEPSS rescore
  3. 2026-07-12 05:46 UTCEPSS rescore
  4. 2026-07-11 21:15 UTCEG score recompute
  5. 2026-07-11 21:15 UTCVendor advisory
  6. 2026-07-11 21:15 UTCGHSA enrichment
  7. 2026-07-11 08:27 UTCEPSS rescore
  8. 2026-07-08 18:24 UTCEG score recompute
  9. 2026-07-08 18:24 UTCVendor advisory
  10. 2026-07-08 18:24 UTCGHSA enrichment
  11. 2026-07-08 15:16 UTCEPSS rescore
  12. 2026-07-07 13:46 UTCEPSS rescore
  13. 2026-07-06 02:23 UTCEPSS rescore
  14. 2026-07-05 02:30 UTCEPSS rescore
  15. 2026-07-04 06:31 UTCEPSS rescore
  16. 2026-07-02 14:14 UTCEG score recompute
  17. 2026-07-02 14:14 UTCVendor advisory
  18. 2026-07-02 14:14 UTCGHSA enrichment
  19. 2026-07-01 15:47 UTCEG score recompute
  20. 2026-07-01 15:47 UTCVendor advisory
  21. 2026-07-01 15:47 UTCGHSA enrichment
  22. 2026-07-01 15:07 UTCEPSS rescore
  23. 2026-07-01 03:07 UTCEG score recompute
  24. 2026-07-01 03:07 UTCVendor advisory
  25. 2026-07-01 03:07 UTCGHSA enrichment
Show 75 more
  1. 2026-06-30 23:22 UTCEPSS rescore
  2. 2026-06-30 02:21 UTCEG score recompute
  3. 2026-06-30 02:21 UTCVendor advisory
  4. 2026-06-30 02:21 UTCGHSA enrichment
  5. 2026-06-29 14:06 UTCEPSS rescore
  6. 2026-06-29 14:06 UTCEPSS rescore
  7. 2026-06-29 13:44 UTCEG score recompute
  8. 2026-06-29 13:44 UTCVendor advisory
  9. 2026-06-29 13:44 UTCGHSA enrichment
  10. 2026-06-28 19:28 UTCEG score recompute
  11. 2026-06-28 19:28 UTCVendor advisory
  12. 2026-06-28 19:28 UTCGHSA enrichment
  13. 2026-06-28 14:07 UTCEPSS rescore
  14. 2026-06-28 06:51 UTCEG score recompute
  15. 2026-06-28 06:51 UTCVendor advisory
  16. 2026-06-28 06:51 UTCGHSA enrichment
  17. 2026-06-28 04:56 UTCEPSS rescore
  18. 2026-06-28 04:56 UTCEPSS rescore
  19. 2026-06-27 18:15 UTCEG score recompute
  20. 2026-06-27 18:15 UTCVendor advisory
  21. 2026-06-27 18:14 UTCGHSA enrichment
  22. 2026-06-27 05:28 UTCEG score recompute
  23. 2026-06-27 05:28 UTCVendor advisory
  24. 2026-06-27 05:27 UTCGHSA enrichment
  25. 2026-06-27 03:08 UTCEPSS rescore
  26. 2026-06-26 16:51 UTCEG score recompute
  27. 2026-06-26 16:51 UTCVendor advisory
  28. 2026-06-26 16:51 UTCGHSA enrichment
  29. 2026-06-26 02:05 UTCEG score recompute
  30. 2026-06-26 02:05 UTCVendor advisory
  31. 2026-06-26 02:05 UTCGHSA enrichment
  32. 2026-06-25 13:49 UTCEPSS rescore
  33. 2026-06-25 11:22 UTCEG score recompute
  34. 2026-06-25 11:22 UTCVendor advisory
  35. 2026-06-25 11:21 UTCGHSA enrichment
  36. 2026-06-24 22:44 UTCEG score recompute
  37. 2026-06-24 22:44 UTCVendor advisory
  38. 2026-06-24 22:44 UTCGHSA enrichment
  39. 2026-06-24 14:05 UTCEPSS rescore
  40. 2026-06-23 21:33 UTCEPSS rescore
  41. 2026-06-23 21:33 UTCEPSS rescore
  42. 2026-06-22 14:25 UTCEPSS rescore
  43. 2026-06-22 14:25 UTCEPSS rescore
  44. 2026-06-21 14:56 UTCEPSS rescore
  45. 2026-06-21 14:56 UTCEPSS rescore
  46. 2026-06-21 01:59 UTCEPSS rescore
  47. 2026-06-21 01:59 UTCEPSS rescore
  48. 2026-06-19 19:26 UTCEPSS rescore
  49. 2026-06-19 19:26 UTCEPSS rescore
  50. 2026-06-18 17:52 UTCEPSS rescore
  51. 2026-06-18 17:52 UTCEPSS rescore
  52. 2026-06-17 18:15 UTCEG score recompute
  53. 2026-06-17 18:15 UTCVendor advisory
  54. 2026-06-17 18:14 UTCGHSA enrichment
  55. 2026-06-17 17:53 UTCEPSS rescore
  56. 2026-06-17 04:19 UTCEG score recompute
  57. 2026-06-17 04:19 UTCVendor advisory
  58. 2026-06-17 04:19 UTCGHSA enrichment
  59. 2026-06-16 17:52 UTCEPSS rescore
  60. 2026-06-16 15:42 UTCEG score recompute
  61. 2026-06-16 15:42 UTCVendor advisory
  62. 2026-06-16 15:42 UTCGHSA enrichment
  63. 2026-06-16 01:37 UTCEG score recompute
  64. 2026-06-16 01:37 UTCVendor advisory
  65. 2026-06-16 01:37 UTCGHSA enrichment
  66. 2026-06-15 17:49 UTCEPSS rescore
  67. 2026-06-15 13:00 UTCEG score recompute
  68. 2026-06-15 13:00 UTCVendor advisory
  69. 2026-06-15 12:59 UTCGHSA enrichment
  70. 2026-06-14 20:45 UTCEG score recompute
  71. 2026-06-14 20:45 UTCVendor advisory
  72. 2026-06-14 20:45 UTCGHSA enrichment
  73. 2026-06-14 08:09 UTCEG score recompute
  74. 2026-06-14 08:09 UTCVendor advisory
  75. 2026-06-14 08:09 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-46181?
CVE-2026-46181 is a high vulnerability published on May 28, 2026. In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx4: Fix mis-use of RCU in mlx4srqevent() Sashiko points out the radix_tree itself is RCU safe, but nothing ever frees the mlx4_srq struct with RCU, and it isn't even accessed within the RCU critical section. It also will…
When was CVE-2026-46181 disclosed?
CVE-2026-46181 was first published in the National Vulnerability Database on May 28, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46181 actively exploited?
CVE-2026-46181 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-46181?
CVE-2026-46181 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-46181?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46181, 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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