CVE-2026-43321

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:

bpf: Properly mark live registers for indirect jumps

For a gotox rX instruction the rX register should be marked as used in the compute_insn_live_regs() function. Fix this.

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 (2)

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

bpf: Properly mark live registers for indirect jumps - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d1aab1ca576c90192ba961094d51b0be6355a4d6
generic

bpf: Properly mark live registers for indirect jumps - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7beae54111c34ca63357ef120e115889b915beb5

Vendor Advisories for CVE-2026-43321(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 @ 6.19.6—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.

Data Freshness Timeline

(refreshed 3× in last 7d / 64× 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 222 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-43321?
CVE-2026-43321 is a high vulnerability published on May 8, 2026. In the Linux kernel, the following vulnerability has been resolved: bpf: Properly mark live registers for indirect jumps For a gotox rX instruction the rX register should be marked as used in the computeinsnlive_regs() function. Fix this.
When was CVE-2026-43321 disclosed?
CVE-2026-43321 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-2026-43321 actively exploited?
CVE-2026-43321 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 97.9% of all scored CVEs.
What is the CVSS score of CVE-2026-43321?
CVE-2026-43321 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-43321?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43321, 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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