CVE-2026-43330

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
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

crypto: caam - fix overflow on long hmac keys

When a key longer than block size is supplied, it is copied and then hashed into the real key. The memory allocated for the copy needs to be rounded to DMA cache alignment, as otherwise the hashed key may corrupt neighbouring memory.

The copying is performed using kmemdup, however this leads to an overflow: reading more bytes (aligned_len - keylen) from the keylen source buffer. Fix this by replacing kmemdup with kmalloc, followed by memcpy.

CVSS v3
7.8
EG Score
7.8(medium)
EPSS
2.9%
KEV
Not listed

Published

May 8, 2026

Last Modified

May 18, 2026

Advisory Details (5)

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

crypto: caam - fix overflow on long hmac keys - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cebc5ebd958346195b77f42d0cd5141b4e448fae
generic

crypto: caam - fix overflow on long hmac keys - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c2fb4984fe09fc176fe4c12d5e3edf626df6511d
generic

crypto: caam - fix overflow on long hmac keys - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/aa545df011338df13f0833fc1fabcb15c0521959
generic

crypto: caam - fix overflow on long hmac keys - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/80688afb9c35b3934ce2d6be9973758915e2e0ef
generic

crypto: caam - fix overflow on long hmac keys - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/31022cfde5235c45fa765f0aabeff5f0652852f2

Vendor Advisories for CVE-2026-43330(3)

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
redhatkernel-0:6.12.0-211.26.1.el10_22026-06-20redhat

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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 41× 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 132 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. 2026-07-13 06:13 UTCEPSS rescore
  5. 2026-07-12 05:46 UTCEPSS rescore
  6. 2026-07-09 19:10 UTCEPSS rescore
  7. 2026-07-08 15:16 UTCEPSS rescore
  8. 2026-07-07 13:46 UTCEPSS rescore
  9. 2026-07-06 16:27 UTCEPSS rescore
  10. 2026-07-06 02:23 UTCEPSS rescore
  11. 2026-07-04 06:31 UTCEPSS rescore
  12. 2026-06-30 23:22 UTCEPSS rescore
  13. 2026-06-29 14:06 UTCEPSS rescore
  14. 2026-06-28 14:07 UTCEPSS rescore
  15. 2026-06-28 05:08 UTCEG score recompute
  16. 2026-06-28 05:08 UTCVendor advisory
  17. 2026-06-28 05:08 UTCGHSA enrichment
  18. 2026-06-28 04:56 UTCEPSS rescore
  19. 2026-06-27 13:53 UTCEG score recompute
  20. 2026-06-27 13:53 UTCVendor advisory
  21. 2026-06-27 13:53 UTCGHSA enrichment
  22. 2026-06-27 03:08 UTCEPSS rescore
  23. 2026-06-26 21:32 UTCEG score recompute
  24. 2026-06-26 21:32 UTCVendor advisory
  25. 2026-06-26 21:32 UTCGHSA enrichment
Show 75 more
  1. 2026-06-25 13:49 UTCEPSS rescore
  2. 2026-06-25 13:49 UTCEPSS rescore
  3. 2026-06-24 14:05 UTCEPSS rescore
  4. 2026-06-23 21:33 UTCEPSS rescore
  5. 2026-06-22 14:25 UTCEPSS rescore
  6. 2026-06-22 14:25 UTCEPSS rescore
  7. 2026-06-21 14:56 UTCEPSS rescore
  8. 2026-06-21 14:56 UTCEPSS rescore
  9. 2026-06-21 01:59 UTCEPSS rescore
  10. 2026-06-19 19:25 UTCEPSS rescore
  11. 2026-06-18 17:52 UTCEPSS rescore
  12. 2026-06-18 17:52 UTCEPSS rescore
  13. 2026-06-17 17:53 UTCEPSS rescore
  14. 2026-06-17 01:59 UTCEG score recompute
  15. 2026-06-17 01:59 UTCGHSA enrichment
  16. 2026-06-16 17:52 UTCEPSS rescore
  17. 2026-06-15 17:49 UTCEPSS rescore
  18. 2026-06-15 03:49 UTCEG score recompute
  19. 2026-06-15 03:49 UTCGHSA enrichment
  20. 2026-06-14 15:30 UTCEG score recompute
  21. 2026-06-14 15:29 UTCGHSA enrichment
  22. 2026-06-14 02:59 UTCEG score recompute
  23. 2026-06-14 02:59 UTCGHSA enrichment
  24. 2026-06-13 23:00 UTCEPSS rescore
  25. 2026-06-12 23:12 UTCEPSS rescore
  26. 2026-06-12 23:12 UTCEPSS rescore
  27. 2026-06-12 20:26 UTCEG score recompute
  28. 2026-06-12 20:26 UTCGHSA enrichment
  29. 2026-06-12 05:31 UTCEG score recompute
  30. 2026-06-12 05:31 UTCGHSA enrichment
  31. 2026-06-11 17:12 UTCEG score recompute
  32. 2026-06-11 17:11 UTCGHSA enrichment
  33. 2026-06-11 14:00 UTCEPSS rescore
  34. 2026-06-11 03:32 UTCEG score recompute
  35. 2026-06-11 03:32 UTCGHSA enrichment
  36. 2026-06-10 22:18 UTCEPSS rescore
  37. 2026-06-10 15:11 UTCEG score recompute
  38. 2026-06-10 15:11 UTCGHSA enrichment
  39. 2026-06-10 13:22 UTCEPSS rescore
  40. 2026-06-10 13:22 UTCEPSS rescore
  41. 2026-06-10 02:52 UTCEG score recompute
  42. 2026-06-10 02:52 UTCGHSA enrichment
  43. 2026-06-09 14:33 UTCEG score recompute
  44. 2026-06-09 14:33 UTCGHSA enrichment
  45. 2026-06-09 02:14 UTCEG score recompute
  46. 2026-06-09 02:14 UTCGHSA enrichment
  47. 2026-06-08 14:17 UTCEPSS rescore
  48. 2026-06-08 14:17 UTCEPSS rescore
  49. 2026-06-08 12:48 UTCEG score recompute
  50. 2026-06-08 12:47 UTCGHSA enrichment
  51. 2026-06-08 00:28 UTCEG score recompute
  52. 2026-06-08 00:28 UTCGHSA enrichment
  53. 2026-06-07 15:25 UTCEPSS rescore
  54. 2026-06-07 15:25 UTCEPSS rescore
  55. 2026-06-07 12:09 UTCEG score recompute
  56. 2026-06-07 12:09 UTCGHSA enrichment
  57. 2026-06-06 23:50 UTCEG score recompute
  58. 2026-06-06 23:50 UTCGHSA enrichment
  59. 2026-06-06 13:47 UTCEPSS rescore
  60. 2026-06-06 13:47 UTCEPSS rescore
  61. 2026-06-06 11:31 UTCEG score recompute
  62. 2026-06-06 11:30 UTCGHSA enrichment
  63. 2026-06-05 23:11 UTCEG score recompute
  64. 2026-06-05 23:11 UTCGHSA enrichment
  65. 2026-06-05 22:47 UTCEPSS rescore
  66. 2026-06-05 10:51 UTCEG score recompute
  67. 2026-06-05 10:51 UTCGHSA enrichment
  68. 2026-06-05 06:10 UTCEPSS rescore
  69. 2026-06-05 06:10 UTCEPSS rescore
  70. 2026-06-04 22:32 UTCEG score recompute
  71. 2026-06-04 22:32 UTCGHSA enrichment
  72. 2026-06-04 13:12 UTCEPSS rescore
  73. 2026-06-04 13:12 UTCEPSS rescore
  74. 2026-06-04 10:13 UTCEG score recompute
  75. 2026-06-04 10:13 UTCGHSA enrichment

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-43330?
CVE-2026-43330 is a high vulnerability published on May 8, 2026. In the Linux kernel, the following vulnerability has been resolved: crypto: caam - fix overflow on long hmac keys When a key longer than block size is supplied, it is copied and then hashed into the real key. The memory allocated for the copy needs to be rounded to DMA cache alignment, as otherwise…
When was CVE-2026-43330 disclosed?
CVE-2026-43330 was first published in the National Vulnerability Database on May 8, 2026, with the most recent update on May 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43330 actively exploited?
CVE-2026-43330 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-43330?
CVE-2026-43330 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-43330?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43330, 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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