CVE-2026-68451

HIGHPre-NVD 7.87.8
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-13. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
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:

s390/zcrypt: Validate length for CCA ECC private key requests

cca_ecc2protkey() derives the copy length for the CPRB parameter block directly from the length field in the key token. Reject the request early if the token length exceeds the available space in the parameter block.

CVSS v3
7.8
EG Score
7.8(high)
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

August 13, 2026

Last Modified

August 19, 2026

Advisory Details (5)

Auto-updated Aug 14, 2026
No patch confirmed yet.
generic

s390/zcrypt: Validate length for CCA ECC private key requests - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ecc3b8691c1935f9f3e4eb964ab11e40fdec17f5
generic

s390/zcrypt: Validate length for CCA ECC private key requests - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/dd25bd9b0f36849808bd7625dcc59dd4c1aeef3e
generic

s390/zcrypt: Validate length for CCA ECC private key requests - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a9ae0f6dd45c3ccc1d69363f7aea8af179122730
generic

s390/zcrypt: Validate length for CCA ECC private key requests - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8fa3e9435a13c335efb63fb4f4e77531a0031159
generic

s390/zcrypt: Validate length for CCA ECC private key requests - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/013a4484f061a2b41f052e25c0015203287e63f1

Vendor Advisories for CVE-2026-68451(1)

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

Data Freshness Timeline

(refreshed 40× in last 7d / 43× 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.

  1. 2026-08-20 15:36 UTCGHSA enrichment
  2. 2026-08-20 04:38 UTCGHSA enrichment
  3. 2026-08-19 17:39 UTCEG score recompute
  4. 2026-08-19 17:39 UTCGHSA enrichment
  5. 2026-08-19 17:04 UTCEPSS rescore
  6. 2026-08-19 16:47 UTCEG score recompute
  7. 2026-08-19 16:46 UTCGHSA enrichment
  8. 2026-08-19 13:54 UTCGHSA enrichment
  9. 2026-08-19 02:55 UTCGHSA enrichment
  10. 2026-08-18 15:36 UTCEG score recompute
  11. 2026-08-18 15:36 UTCGHSA enrichment
  12. 2026-08-18 13:49 UTCEPSS rescore
  13. 2026-08-18 13:49 UTCEPSS rescore
  14. 2026-08-18 04:27 UTCGHSA enrichment
  15. 2026-08-17 17:29 UTCEG score recompute
  16. 2026-08-17 17:29 UTCGHSA enrichment
  17. 2026-08-17 13:47 UTCEPSS rescore
  18. 2026-08-17 06:30 UTCEG score recompute
  19. 2026-08-17 06:30 UTCGHSA enrichment
  20. 2026-08-17 05:35 UTCEG score recompute
  21. 2026-08-17 05:35 UTCGHSA enrichment
  22. 2026-08-17 04:36 UTCGHSA enrichment
  23. 2026-08-16 17:38 UTCEG score recompute
  24. 2026-08-16 17:38 UTCGHSA enrichment
  25. 2026-08-16 14:56 UTCEPSS rescore
Show 18 more
  1. 2026-08-16 14:56 UTCEPSS rescore
  2. 2026-08-16 06:35 UTCEG score recompute
  3. 2026-08-16 06:35 UTCGHSA enrichment
  4. 2026-08-15 19:38 UTCGHSA enrichment
  5. 2026-08-15 08:40 UTCEG score recompute
  6. 2026-08-15 08:40 UTCGHSA enrichment
  7. 2026-08-15 01:30 UTCEPSS rescore
  8. 2026-08-14 21:42 UTCGHSA enrichment
  9. 2026-08-14 10:44 UTCEG score recompute
  10. 2026-08-14 10:44 UTCGHSA enrichment
  11. 2026-08-13 23:46 UTCEG score recompute
  12. 2026-08-13 23:46 UTCGHSA enrichment
  13. 2026-08-13 23:03 UTCEG score recompute 7.80
  14. 2026-08-13 23:03 UTCGHSA enrichment
  15. 2026-08-13 23:03 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  16. 2026-08-13 15:22 UTCNVD update
  17. 2026-08-13 14:22 UTCEG score recompute
  18. 2026-08-13 14:21 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-68451?
CVE-2026-68451 is a high vulnerability published on August 13, 2026. In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Validate length for CCA ECC private key requests cca_ecc2protkey() derives the copy length for the CPRB parameter block directly from the length field in the key token. Reject the request early if the token length…
When was CVE-2026-68451 disclosed?
CVE-2026-68451 was first published in the National Vulnerability Database on August 13, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-68451 actively exploited?
CVE-2026-68451 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 96.8% of all scored CVEs.
What is the CVSS score of CVE-2026-68451?
CVE-2026-68451 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-68451?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-68451, 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

Explore the affected products and dependency analysis for CVE-2026-68451

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