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

A fix is available — apply it.

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
42%
KEV
Not listed

Published

May 8, 2026

Last Modified

August 5, 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(27)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-gcp-edge (5.15.0.1112.122~20.04.1) @ focal2026-08-23ubuntu
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-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-08-23ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-08-23ubuntu
ubuntulinux-tools-lowlatency-hwe-22.04-edge (6.8.0-136.136.2~22.04.1) @ jammy2026-08-23ubuntu
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-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-08-23ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-08-23ubuntu
ubuntulinux-tools-ibm-edge (5.15.0.1106.110~20.04.1) @ focal2026-08-23ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-08-23ubuntu
ubuntulinux-tools-azure-edge (6.8.0-1063.71~22.04.1) @ jammy2026-08-23ubuntu
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-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-08-23ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ 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
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-08-23ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1117.102) @ jammy2026-08-23ubuntu
ubuntulinux-tools-intel-iot-realtime-5.15 (5.15.0.1104.108) @ jammy2026-08-23ubuntu
ubuntulinux-tools-intel-iotg-5.15 (5.15.0.1107.106) @ jammy2026-08-23ubuntu
linuxKernel @ 5.10.253—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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (53 versions)5.10.257-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (48 versions)6.1.170-1—
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 (122 versions)6.19.10-1—

Weakness Classification(1)

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

All Vendor Advisories

(25)

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 5× 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 231 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

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 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-2026-43373 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 58.1% 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

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