CVE-2026-43033

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-01. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
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: authencesn - Do not place hiseq at end of dst for out-of-place decryption

When decrypting data that is not in-place (src != dst), there is no need to save the high-order sequence bits in dst as it could simply be re-copied from the source.

However, the data to be hashed need to be rearranged accordingly.

Thanks,

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 1, 2026

Last Modified

September 8, 2026

Advisory Details (8)

Auto-updated May 3, 2026
No patch confirmed yet.
generic

crypto: authencesn - Do not place hiseq at end of dst for out-of-place decryption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e02494114ebf7c8b42777c6cd6982f113bfdbec7
generic

crypto: authencesn - Do not place hiseq at end of dst for out-of-place decryption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d589abd8b019b07075fda255ceab8c8e950cdb3f
generic

crypto: authencesn - Do not place hiseq at end of dst for out-of-place decryption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d0c4ff6812386880f30bc64c2921299cc4d7b47f
generic

crypto: authencesn - Do not place hiseq at end of dst for out-of-place decryption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cded4002d22177e8deaca1f257ecd932c9582b6b
generic

crypto: authencesn - Do not place hiseq at end of dst for out-of-place decryption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8c62f618576519dbed6816fafc623ce592953025
generic

crypto: authencesn - Do not place hiseq at end of dst for out-of-place decryption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/89fe118b6470119b20c04afc36e45b81a69ea11f
generic

crypto: authencesn - Do not place hiseq at end of dst for out-of-place decryption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5466e7d0cd9e4f9cef9d8f18f18b60e7bc1c77e5
generic

crypto: authencesn - Do not place hiseq at end of dst for out-of-place decryption - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/153d5520c3f9fd62e71c7e7f9e34b59cf411e555

Vendor Advisories for CVE-2026-43033(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(31)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-24.04 (6.17.0-29.29~24.04.1) @ noble2026-09-08ubuntu
ubuntulinux-virtual-6.8 (6.8.0-117.117) @ noble2026-09-08ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.179.163) @ jammy2026-09-08ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.4.0-1077 (5.4.0-1077.81) @ focal2026-09-08ubuntu
ubuntulinux-tools-gcp-64k-6.17 (6.17.0-1018.19) @ questing2026-09-08ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1074 (5.15.0-1074.78) @ jammy2026-09-08ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1114.99) @ jammy2026-09-08ubuntu
ubuntulinux-tools-oracle-edge (6.17.0-1014.14~24.04.1) @ noble2026-09-08ubuntu
ubuntulinux-tools-azure-lts-20.04 (5.4.0.1163.155) @ focal2026-09-08ubuntu
ubuntulinux-tools-azure-lts-18.04 (4.15.0.1201.169) @ bionic2026-09-08ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1108.117~20.04.1) @ focal2026-09-08ubuntu
ubuntulinux-tools-nvidia-hwe-22.04-edge (6.8.0-1054.57~22.04.1) @ jammy2026-09-08ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1056.62) @ noble2026-09-08ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (5.15.0.179.189~20.04.1) @ focal2026-09-08ubuntu
ubuntulinux-tools-azure-6.17 (6.17.0-1015.15) @ questing2026-09-08ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1025.25) @ noble2026-09-08ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (5.15.0.179.151) @ jammy2026-09-08ubuntu
ubuntulinux-tools-raspi2-hwe-18.04-edge (5.4.0.1143.174) @ focal2026-09-08ubuntu
ubuntulinux-virtual-hwe-18.04-edge (5.4.0.231.251~18.04.1) @ bionic2026-09-08ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1059.65+fips1) @ noble2026-09-08ubuntu
ubuntulinux-virtual-hwe-16.04-edge (4.15.0.250.234) @ bionic2026-09-08ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1054.57.1) @ noble2026-09-08ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1106.112~20.04.1) @ focal2026-09-08ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1032.33) @ noble2026-09-08ubuntu
ubuntulinux-tools-nvidia-hwe-24.04 (6.17.0-1026.26) @ noble2026-09-08ubuntu
ubuntulinux-tools-nvidia-tegra-igx-rt-5.15 (5.15.0.1049.51) @ jammy2026-09-08ubuntu
ubuntulinux-tools-azure-lts-22.04 (5.15.0.1114.112) @ jammy2026-09-08ubuntu
ubuntulinux-tools-azure-edge (6.8.0-1059.65~22.04.1) @ jammy2026-09-08ubuntu
ubuntulinux-virtual-hwe-16.04-edge (4.15.0.250.262~16.04.1) @ xenial2026-09-08ubuntu
ubuntulinux-tools-iot-5.4 (5.4.0.1063.61) @ focal2026-09-08ubuntu
linuxKernel @ 5.10.254—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

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (50 versions)5.10.251-3—
linux-6.16.1.106-3~deb11u1 ... 6.1.164-1~deb11u1 (16 versions)6.1.170-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (48 versions)6.1.170-1—
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 (125 versions)6.19.12-1—

Additional Vendor Advisories

(24)

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 5× in last 7d / 29× 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 254 total refreshes for this CVE.

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

Related CVEs(same product + same vendor)

Frequently asked(5)

What is CVE-2026-43033?
CVE-2026-43033 is a high vulnerability published on May 1, 2026. In the Linux kernel, the following vulnerability has been resolved: crypto: authencesn - Do not place hiseq at end of dst for out-of-place decryption When decrypting data that is not in-place (src != dst), there is no need to save the high-order sequence bits in dst as it could simply be re-copied…
When was CVE-2026-43033 disclosed?
CVE-2026-43033 was first published in the National Vulnerability Database on May 1, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43033 actively exploited?
CVE-2026-43033 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 96.7% of all scored CVEs.
What is the CVSS score of CVE-2026-43033?
CVE-2026-43033 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-43033?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43033, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-43033

Explore →

Is Your Infrastructure Affected by CVE-2026-43033?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs