CVE-2026-43042

HIGHNVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-05-01. NVD baseline CVSS 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.1Exploit: 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:

mpls: add seqcount to protect the platform_label{,s} pair

The RCU-protected codepaths (mpls_forward, mpls_dump_routes) can have an inconsistent view of platform_labels vs platform_label in case of a concurrent resize (resize_platform_label_table, under platform_mutex). This can lead to OOB accesses.

This patch adds a seqcount, so that we get a consistent snapshot.

Note that mpls_label_ok is also susceptible to this, so the check against RTA_DST in rtm_to_route_config, done outside platform_mutex, is not sufficient. This value gets passed to mpls_label_ok once more in both mpls_route_add and mpls_route_del, so there is no issue, but that additional check must not be removed.

CVSS v3
7.1
EG Score
7.1(medium)
EPSS
1.5%
KEV
Not listed

Published

May 1, 2026

Last Modified

May 8, 2026

Advisory Details (2)

Auto-updated May 8, 2026
No patch confirmed yet.
generic

mpls: add seqcount to protect the platform_label{,s} pair - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/629ec78ef8608d955ce217880cdc3e1873af3a15
generic

mpls: add seqcount to protect the platform_label{,s} pair - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5bb3caf0bbfb56f1a00d2af072ac3d8395a3b9ef

Vendor Advisories for CVE-2026-43042(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 4× in last 7d / 25× 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 111 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-43042?
CVE-2026-43042 is a high vulnerability published on May 1, 2026. In the Linux kernel, the following vulnerability has been resolved: mpls: add seqcount to protect the platform_label{,s} pair The RCU-protected codepaths (mplsforward, mplsdump_routes) can have an inconsistent view of platformlabels vs platformlabel in case of a concurrent resize…
When was CVE-2026-43042 disclosed?
CVE-2026-43042 was first published in the National Vulnerability Database on May 1, 2026, with the most recent update on May 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43042 actively exploited?
CVE-2026-43042 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-43042?
CVE-2026-43042 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-43042?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43042, 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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