CVE-2026-43373

HIGHNVD 7.57.5
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-05-08. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: 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:

net: ncsi: fix skb leak in error paths

Early return paths in NCSI RX and AEN handlers fail to release the received skb, resulting in a memory leak.

Specifically, ncsi_aen_handler() returns on invalid AEN packets without consuming the skb. Similarly, ncsi_rcv_rsp() exits early when failing to resolve the NCSI device, response handler, or request, leaving the skb unfreed.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
40%
KEV
Not listed

Published

May 8, 2026

Last Modified

May 15, 2026

Advisory Details (8)

Auto-updated May 11, 2026
No patch confirmed yet.
generic

net: ncsi: fix skb leak in error paths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fef5aa6e3bcf3c8053307642663a63b7362d7552
generic

net: ncsi: fix skb leak in error paths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b70c4e5e711931cdd56e6e905737b72f1e649189
generic

net: ncsi: fix skb leak in error paths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9891d7f4f1ede473c54b49776ae07755083eef06
generic

net: ncsi: fix skb leak in error paths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/87138dde2d6937b12b967f28fe598a7d59000ae4
generic

net: ncsi: fix skb leak in error paths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/81d6aee32f8f7bbc175c05dbf61f4430bfb88c4a
generic

net: ncsi: fix skb leak in error paths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5c3398a54266541610c8d0a7082e654e9ff3e259
generic

net: ncsi: fix skb leak in error paths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/59962588197863d0d746879f193905c0c6b3df49
generic

net: ncsi: fix skb leak in error paths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/553366c271479c0d571dd1bb5d1bcde4747fb82e

Vendor Advisories for CVE-2026-43373(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 5.10.253osv

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 9× in last 7d / 34× 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 116 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-43373?
CVE-2026-43373 is a high vulnerability published on May 8, 2026. In the Linux kernel, the following vulnerability has been resolved: net: ncsi: fix skb leak in error paths Early return paths in NCSI RX and AEN handlers fail to release the received skb, resulting in a memory leak. Specifically, ncsiaenhandler() returns on invalid AEN packets without consuming the…
When was CVE-2026-43373 disclosed?
CVE-2026-43373 was first published in the National Vulnerability Database on May 8, 2026, with the most recent update on May 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43373 actively exploited?
CVE-2026-43373 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 60.0% of all scored CVEs.
What is the CVSS score of CVE-2026-43373?
CVE-2026-43373 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-43373?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43373, 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-2026-43373

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