CVE-2026-43099

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-05-06. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 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:

ipv4: icmp: fix null-ptr-deref in icmp_build_probe()

ipv6_stub->ipv6_dev_find() may return ERR_PTR(-EAFNOSUPPORT) when the IPv6 stack is not active (CONFIG_IPV6=m and not loaded), and passing this error pointer to dev_hold() will cause a kernel crash with null-ptr-deref.

Instead, silently discard the request. RFC 8335 does not appear to define a specific response for the case where an IPv6 interface identifier is syntactically valid but the implementation cannot perform the lookup at runtime, and silently dropping the request may safer than misreporting "No Such Interface".

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
38.9%
KEV
Not listed

Published

May 6, 2026

Last Modified

June 1, 2026

Advisory Details (5)

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

ipv4: icmp: fix null-ptr-deref in icmp_build_probe() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fde29fd9349327acc50d19a0b5f3d5a6c964dfd8
generic

ipv4: icmp: fix null-ptr-deref in icmp_build_probe() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f91b3ed9e7fa82a70511b5f6901c88379acf2964
generic

ipv4: icmp: fix null-ptr-deref in icmp_build_probe() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6be325206850a0891896d38bcf83a09d8b54ec48
generic

ipv4: icmp: fix null-ptr-deref in icmp_build_probe() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5b9911582d441f72fe6ccb15ffe3303bbc07f6f5
generic

ipv4: icmp: fix null-ptr-deref in icmp_build_probe() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/47a8bf52156ac7e7a581eca31c1f964ba4258d4d

Vendor Advisories for CVE-2026-43099(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 32× 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.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-43099?
CVE-2026-43099 is a high vulnerability published on May 6, 2026. In the Linux kernel, the following vulnerability has been resolved: ipv4: icmp: fix null-ptr-deref in icmpbuildprobe() ipv6stub->ipv6devfind() may return ERRPTR(-EAFNOSUPPORT) when the IPv6 stack is not active (CONFIG_IPV6=m and not loaded), and passing this error pointer to dev_hold() will cause a…
When was CVE-2026-43099 disclosed?
CVE-2026-43099 was first published in the National Vulnerability Database on May 6, 2026, with the most recent update on June 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43099 actively exploited?
CVE-2026-43099 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 38.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-43099?
CVE-2026-43099 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-43099?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43099, 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.

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