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
7.8EG
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

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)
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
3%
KEV
Not listed

Published

May 8, 2026

Last Modified

August 5, 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(17)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-08-23ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-08-23ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-08-23ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-08-23ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-08-23ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1058.61) @ noble2026-08-23ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-08-23ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-08-23ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-08-23ubuntu
ubuntulinux-tools-ibm-edge (6.8.0-1061.62~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-08-23ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-08-23ubuntu
redhatkernel-0:6.12.0-55.88.1.el10_02026-07-14redhat
redhatkernel-0:6.12.0-211.26.1.el10_22026-06-20redhat
linuxKernel @ 6.6.134—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

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.85-1~bpo12+1 (17 versions)6.12.85-1—
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.

Additional Vendor Advisories

(14)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 6× in last 7d / 85× 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 203 total refreshes for this CVE.

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

Related CVEs(same product + 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 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-2026-43330 actively exploited?
CVE-2026-43330 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 97.1% of all scored CVEs.
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.

Dependency Blast Radius

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