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
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: 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:

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)
EG Risk
36(Track)
EG Risk 36/100SSVC: 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
Severity71% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
1%
KEV
Not listed

Published

May 1, 2026

Last Modified

August 5, 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.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 6.19.12—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 ... 7.2~rc5-1~exp1 (496 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 7.2~rc5-1~exp1 (335 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.2~rc5-1~exp1 (160 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.19~rc8-1~exp1 (122 versions)6.19.12-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 3× 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 165 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. 2026-08-28 21:41 UTCEPSS rescore
  5. 2026-08-27 14:25 UTCEPSS rescore
  6. 2026-08-26 14:46 UTCEPSS rescore
  7. 2026-08-25 13:49 UTCEPSS rescore
  8. 2026-08-23 21:47 UTCEG score recompute
  9. 2026-08-23 21:47 UTCGHSA enrichment
  10. 2026-08-23 00:19 UTCEPSS rescore
  11. 2026-08-20 22:55 UTCEPSS rescore
  12. 2026-08-19 17:03 UTCEPSS rescore
  13. 2026-08-17 13:47 UTCEPSS rescore
  14. 2026-08-17 13:20 UTCEG score recompute
  15. 2026-08-17 13:20 UTCGHSA enrichment
  16. 2026-08-16 14:56 UTCEPSS rescore
  17. 2026-08-16 05:16 UTCEG score recompute
  18. 2026-08-16 05:16 UTCGHSA enrichment
  19. 2026-08-16 02:14 UTCEPSS rescore
  20. 2026-08-15 01:30 UTCEPSS rescore
  21. 2026-08-14 16:14 UTCGHSA enrichment
  22. 2026-08-14 03:44 UTCEG score recompute
  23. 2026-08-14 03:44 UTCGHSA enrichment
  24. 2026-08-13 22:00 UTCEPSS rescore
  25. 2026-08-13 06:40 UTCGHSA enrichment
Show 75 more
  1. 2026-08-12 17:23 UTCGHSA enrichment
  2. 2026-08-11 16:15 UTCEG score recompute
  3. 2026-08-11 16:15 UTCGHSA enrichment
  4. 2026-08-11 13:43 UTCEPSS rescore
  5. 2026-08-11 01:47 UTCEG score recompute
  6. 2026-08-11 01:47 UTCGHSA enrichment
  7. 2026-08-11 00:00 UTCEPSS rescore
  8. 2026-08-10 03:52 UTCGHSA enrichment
  9. 2026-08-09 15:22 UTCEG score recompute
  10. 2026-08-09 15:22 UTCGHSA enrichment
  11. 2026-08-09 13:46 UTCEPSS rescore
  12. 2026-08-09 02:52 UTCEG score recompute
  13. 2026-08-09 02:52 UTCGHSA enrichment
  14. 2026-08-08 16:37 UTCEPSS rescore
  15. 2026-08-08 13:26 UTCGHSA enrichment
  16. 2026-08-08 00:45 UTCEG score recompute
  17. 2026-08-08 00:45 UTCGHSA enrichment
  18. 2026-08-07 12:15 UTCGHSA enrichment
  19. 2026-08-06 17:04 UTCEG score recompute
  20. 2026-08-06 17:04 UTCGHSA enrichment
  21. 2026-08-06 13:46 UTCEPSS rescore
  22. 2026-08-06 01:04 UTCEG score recompute
  23. 2026-08-06 01:04 UTCGHSA enrichment
  24. 2026-08-05 19:17 UTCEPSS rescore
  25. 2026-08-05 12:34 UTCEG score recompute
  26. 2026-08-05 12:34 UTCGHSA enrichment
  27. 2026-08-04 15:10 UTCEPSS rescore
  28. 2026-08-04 10:38 UTCEPSS rescore
  29. 2026-08-03 20:17 UTCEG score recompute
  30. 2026-08-03 20:17 UTCGHSA enrichment
  31. 2026-08-03 10:36 UTCEPSS rescore
  32. 2026-08-02 18:11 UTCGHSA enrichment
  33. 2026-08-02 05:38 UTCEG score recompute
  34. 2026-08-02 05:38 UTCGHSA enrichment
  35. 2026-08-01 04:16 UTCEPSS rescore
  36. 2026-07-30 16:28 UTCEPSS rescore
  37. 2026-07-30 01:30 UTCEPSS rescore
  38. 2026-07-28 15:36 UTCEPSS rescore
  39. 2026-07-27 14:13 UTCEPSS rescore
  40. 2026-07-26 14:54 UTCEPSS rescore
  41. 2026-07-26 14:54 UTCEPSS rescore
  42. 2026-07-25 14:18 UTCEPSS rescore
  43. 2026-07-24 14:17 UTCEPSS rescore
  44. 2026-07-23 14:18 UTCEPSS rescore
  45. 2026-07-23 03:13 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. 2026-07-20 11:02 UTCOSV refresh
  50. 2026-07-19 14:31 UTCEPSS rescore
  51. 2026-07-19 02:29 UTCEPSS rescore
  52. 2026-07-16 17:03 UTCEPSS rescore
  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. 2026-07-09 19:10 UTCEPSS rescore
  57. 2026-07-08 15:16 UTCEPSS rescore
  58. 2026-07-07 13:46 UTCEPSS rescore
  59. 2026-07-06 02:23 UTCEPSS rescore
  60. 2026-07-05 02:30 UTCEPSS rescore
  61. 2026-07-04 06:31 UTCEPSS rescore
  62. 2026-07-01 15:06 UTCEPSS rescore
  63. 2026-06-30 23:22 UTCEPSS rescore
  64. 2026-06-28 14:07 UTCEPSS rescore
  65. 2026-06-27 03:08 UTCEPSS rescore
  66. 2026-06-25 13:49 UTCEPSS rescore
  67. 2026-06-25 13:49 UTCEPSS rescore
  68. 2026-06-24 14:05 UTCEPSS rescore
  69. 2026-06-23 21:33 UTCEPSS rescore
  70. 2026-06-21 14:56 UTCEPSS rescore
  71. 2026-06-21 14:56 UTCEPSS rescore
  72. 2026-06-21 01:59 UTCEPSS rescore
  73. 2026-06-19 19:25 UTCEPSS rescore
  74. 2026-06-18 17:52 UTCEPSS rescore
  75. 2026-06-18 17:52 UTCEPSS rescore

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 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-2026-43042 actively exploited?
CVE-2026-43042 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 98.6% of all scored CVEs.
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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