CVE-2026-43447

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-08. 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

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:

iavf: fix PTP use-after-free during reset

Commit 7c01dbfc8a1c5f ("iavf: periodically cache PHC time") introduced a worker to cache PHC time, but failed to stop it during reset or disable.

This creates a race condition where iavf_reset_task() or iavf_disable_vf() free adapter resources (AQ) while the worker is still running. If the worker triggers iavf_queue_ptp_cmd() during teardown, it accesses freed memory/locks, leading to a crash.

Fix this by calling iavf_ptp_release() before tearing down the adapter. This ensures ptp_clock_unregister() synchronously cancels the worker and cleans up the chardev before the backing resources are destroyed.

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 8, 2026

Last Modified

August 5, 2026

Advisory Details (3)

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

iavf: fix PTP use-after-free during reset - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/efc54fb13d79117a825fef17364315a58682c7ec
generic

iavf: fix PTP use-after-free during reset - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/90cc8b2add29b57288025b51c70bc647e7cccb12
generic

iavf: fix PTP use-after-free during reset - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1b034f2429ce6b45ce74dc266175d277acafc5c4

Vendor Advisories for CVE-2026-43447(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 @ 6.18.19—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

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.19~rc8-1~exp1 (119 versions)6.19.10-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 4× in last 7d / 46× 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 176 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-43447?
CVE-2026-43447 is a high vulnerability published on May 8, 2026. In the Linux kernel, the following vulnerability has been resolved: iavf: fix PTP use-after-free during reset Commit 7c01dbfc8a1c5f ("iavf: periodically cache PHC time") introduced a worker to cache PHC time, but failed to stop it during reset or disable. This creates a race condition where…
When was CVE-2026-43447 disclosed?
CVE-2026-43447 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-2026-43447 actively exploited?
CVE-2026-43447 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 97.6% of all scored CVEs.
What is the CVSS score of CVE-2026-43447?
CVE-2026-43447 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-43447?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43447, 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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