CVE-2026-68451 (GCVE-0-2026-68451)

Vulnerability from cvelistv5 – Published: 2026-08-13 13:59 – Updated: 2026-10-19 21:09
VLAI
Title
s390/zcrypt: Validate length for CCA ECC private key requests
Summary
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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 15:49 UTC
CWE
  • CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: fa6999e326fe7851ecbd572b8cb9be8e930ebf41 , < 7dc306ff7c4d951582adaae65e0aee9fb4968dbe (git)
Affected: fa6999e326fe7851ecbd572b8cb9be8e930ebf41 , < 447a37a6bef11bfd3645069e380460b11386e2b9 (git)
Affected: fa6999e326fe7851ecbd572b8cb9be8e930ebf41 , < f0831f13c42c1261d449dcee8a035e1c6cd9fcaa (git)
Affected: fa6999e326fe7851ecbd572b8cb9be8e930ebf41 , < dd25bd9b0f36849808bd7625dcc59dd4c1aeef3e (git)
Affected: fa6999e326fe7851ecbd572b8cb9be8e930ebf41 , < ecc3b8691c1935f9f3e4eb964ab11e40fdec17f5 (git)
Affected: fa6999e326fe7851ecbd572b8cb9be8e930ebf41 , < 013a4484f061a2b41f052e25c0015203287e63f1 (git)
Affected: fa6999e326fe7851ecbd572b8cb9be8e930ebf41 , < 8fa3e9435a13c335efb63fb4f4e77531a0031159 (git)
Affected: fa6999e326fe7851ecbd572b8cb9be8e930ebf41 , < a9ae0f6dd45c3ccc1d69363f7aea8af179122730 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 5.10.265 , ≤ 5.10.* (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.151 , ≤ 6.6.* (semver)
Unaffected: 6.12.103 , ≤ 6.12.* (semver)
Unaffected: 6.18.44 , ≤ 6.18.* (semver)
Unaffected: 7.1.8 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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      "product_status:known_affected": "186",
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: s390/zcrypt: Validate length for CCA ECC private key requests",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68451.json",
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      "cve": "CVE-2026-68451",
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      "product_status:recommended": "424",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68451",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-68451.json",
      "version": "11"
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}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.