CVE-2026-80709

HIGHPre-NVD 7.87.8
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-28. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 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: Fix wrong domain value verification with EP11 CPRBs

There is a wrong upper limit check for the domain value when an EP11 CPRB is processed for sending to a crypto card. This check is only active on custom device nodes but may lead to access heap memory behind perms->adm when an administrative CPRB is sent. Add correct limit (AP_DOMAINS = 256) checking to fix this.

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
2%
KEV
Not listed

Published

August 28, 2026

Last Modified

August 29, 2026

Advisory Details (6)

Auto-updated Aug 29, 2026
No patch confirmed yet.
generic

s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/983279d7f86ade73db86f886e09172dd567031b5
generic

s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1223477ca88e2396eca440919d0ca8754df79bd5
generic

s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/672b12940e3f1336dfed5287412a71500adf2a76
generic

s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/13e53d6ae1c3b2ff1be75b9ef09be26f4ec3ce15
generic

s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b505dcc8307d64468b463dfad45a03bf865c637e
generic

s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4589f742718d0256ea6dd1f5a78be6e689bdb8aa

Vendor Advisories for CVE-2026-80709(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 12× in last 7d / 12× 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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 19:47 UTCEG score recompute
  3. 2026-08-29 19:47 UTCGHSA enrichment
  4. 2026-08-29 07:25 UTCEG score recompute
  5. 2026-08-29 07:25 UTCGHSA enrichment
  6. 2026-08-29 06:35 UTCEG score recompute 7.80
  7. 2026-08-29 06:35 UTCGHSA enrichment
  8. 2026-08-29 06:33 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  9. 2026-08-28 21:42 UTCEPSS rescore
  10. 2026-08-28 08:20 UTCNVD update
  11. 2026-08-28 07:33 UTCEG score recompute
  12. 2026-08-28 07:32 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-80709?
CVE-2026-80709 is a high vulnerability published on August 28, 2026. In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs There is a wrong upper limit check for the domain value when an EP11 CPRB is processed for sending to a crypto card. This check is only active on custom device nodes…
When was CVE-2026-80709 disclosed?
CVE-2026-80709 was first published in the National Vulnerability Database on August 28, 2026, with the most recent update on August 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-80709 actively exploited?
CVE-2026-80709 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-2026-80709?
CVE-2026-80709 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-80709?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-80709, 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-2026-80709

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