CVE-2026-43120

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-06. NVD baseline CVSS 7.8; sources differ by 0.0.

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

A fix is available — apply it.

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

RDMA/irdma: Fix double free related to rereg_user_mr

If IB_MR_REREG_TRANS is set during rereg_user_mr, the umem will be released and a new one will be allocated in irdma_rereg_mr_trans. If any step of irdma_rereg_mr_trans fails after the new umem is allocated, it releases the umem, but does not set iwmr->region to NULL. The problem is that this failure is propagated to the user, who will then call ibv_dereg_mr (as they should). Then, the dereg_mr path will see a non-NULL umem and attempt to call ib_umem_release again.

Fix this by setting iwmr->region to NULL after ib_umem_release.

Fixed: 5ac388db27c4 ("RDMA/irdma: Add support to re-register a memory region")

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

May 6, 2026

Last Modified

August 5, 2026

Advisory Details (5)

Auto-updated May 12, 2026
No patch confirmed yet.
generic

RDMA/irdma: Fix double free related to rereg_user_mr - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/66964118f1f50ed85001c8fc9f7ab5bbdd021ee0
generic

RDMA/irdma: Fix double free related to rereg_user_mr - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/62298a48f8b8788ad8b8464e6ffdf1ddebd2217e
generic

RDMA/irdma: Fix double free related to rereg_user_mr - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/29a3edd7004bb635d299fb9bc6f0ea4ef13ed5a2
generic

RDMA/irdma: Fix double free related to rereg_user_mr - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0f22c32141acdcda266b26cab2b830baf870f3e0
generic

RDMA/irdma: Fix double free related to rereg_user_mr - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0c5d70bcb9d2275a1c8515a924016fcfeb4ab441

Patch Availability(15)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-08-23ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-08-23ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-08-23ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1058.61) @ noble2026-08-23ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-08-23ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-08-23ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-08-23ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-08-23ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-08-23ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-08-23ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-08-23ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-08-23ubuntu
linuxKernel @ 6.6.136—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.

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.85-1~bpo12+1 (17 versions)6.12.85-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.19~rc8-1~exp1 (129 versions)6.19.14-1—

Weakness Classification(1)

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

All Vendor Advisories

(14)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 7× in last 7d / 28× 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 204 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-43120?
CVE-2026-43120 is a high vulnerability published on May 6, 2026. In the Linux kernel, the following vulnerability has been resolved: RDMA/irdma: Fix double free related to reregusermr If IBMRREREGTRANS is set during rereguser_mr, the umem will be released and a new one will be allocated in irdmareregmrtrans. If any step of irdmareregmrtrans fails after the new…
When was CVE-2026-43120 disclosed?
CVE-2026-43120 was first published in the National Vulnerability Database on May 6, 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-2026-43120 actively exploited?
CVE-2026-43120 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 97.7% of all scored CVEs.
What is the CVSS score of CVE-2026-43120?
CVE-2026-43120 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-43120?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43120, 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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