CVE-2026-43193

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-05-06. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: 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:

nfsd: fix nfs4_file refcount leak in nfsd_get_dir_deleg()

Claude pointed out that there is a nfs4_file refcount leak in nfsd_get_dir_deleg(). Ensure that the reference to "fp" is released before returning.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity55% × 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

May 11, 2026

Advisory Details (2)

Auto-updated Jun 14, 2026
No patch confirmed yet.
generic

nfsd: fix nfs4_file refcount leak in nfsd_get_dir_deleg() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/789477b849394afdb60507924d65f7ef18f078ce
generic

nfsd: fix nfs4_file refcount leak in nfsd_get_dir_deleg() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0d8362e15aad5b5c1d6a65bb23ac6c45ccf881f3

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 6.19.6—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.

Data Freshness Timeline

(refreshed 6× in last 7d / 26× 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 162 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-43193?
CVE-2026-43193 is a medium vulnerability published on May 6, 2026. In the Linux kernel, the following vulnerability has been resolved: nfsd: fix nfs4file refcount leak in nfsdgetdirdeleg() Claude pointed out that there is a nfs4_file refcount leak in nfsdgetdir_deleg(). Ensure that the reference to "fp" is released before returning.
When was CVE-2026-43193 disclosed?
CVE-2026-43193 was first published in the National Vulnerability Database on May 6, 2026, with the most recent update on May 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43193 actively exploited?
CVE-2026-43193 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 98.5% of all scored CVEs.
What is the CVSS score of CVE-2026-43193?
CVE-2026-43193 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-43193?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43193, 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

Explore the affected products and dependency analysis for CVE-2026-43193

Explore →

Is Your Infrastructure Affected by CVE-2026-43193?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs