CVE-2026-68451
s390/zcrypt: Validate length for CCA ECC private key requests
Description
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.
INFO
Published Date :
Aug. 13, 2026, 3:19 p.m.
Last Modified :
Aug. 17, 2026, 6:17 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Update the Linux kernel to the latest version.
- Ensure key token lengths do not exceed buffer space.
- Apply security patches for the zcrypt module.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-68451.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-68451 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-68451
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-68451 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-68451 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'fa6999e326fe7851ecbd572b8cb9be8e930ebf41', 'lessThan': 'dd25bd9b0f36849808bd7625dcc59dd4c1aeef3e', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa6999e326fe7851ecbd572b8cb9be8e930ebf41', 'lessThan': 'ecc3b8691c1935f9f3e4eb964ab11e40fdec17f5', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa6999e326fe7851ecbd572b8cb9be8e930ebf41', 'lessThan': '013a4484f061a2b41f052e25c0015203287e63f1', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa6999e326fe7851ecbd572b8cb9be8e930ebf41', 'lessThan': '8fa3e9435a13c335efb63fb4f4e77531a0031159', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa6999e326fe7851ecbd572b8cb9be8e930ebf41', 'lessThan': 'a9ae0f6dd45c3ccc1d69363f7aea8af179122730', 'versionType': 'git'}], 'programFiles': ['drivers/s390/crypto/zcrypt_ccamisc.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.10'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.10', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc6', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/s390/crypto/zcrypt_ccamisc.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'fa6999e326fe7851ecbd572b8cb9be8e930ebf41', 'lessThan': 'dd25bd9b0f36849808bd7625dcc59dd4c1aeef3e', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa6999e326fe7851ecbd572b8cb9be8e930ebf41', 'lessThan': 'ecc3b8691c1935f9f3e4eb964ab11e40fdec17f5', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa6999e326fe7851ecbd572b8cb9be8e930ebf41', 'lessThan': '013a4484f061a2b41f052e25c0015203287e63f1', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa6999e326fe7851ecbd572b8cb9be8e930ebf41', 'lessThan': '8fa3e9435a13c335efb63fb4f4e77531a0031159', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa6999e326fe7851ecbd572b8cb9be8e930ebf41', 'lessThan': 'a9ae0f6dd45c3ccc1d69363f7aea8af179122730', 'versionType': 'git'}], 'programFiles': ['drivers/s390/crypto/zcrypt_ccamisc.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.10'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.10', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/s390/crypto/zcrypt_ccamisc.c'], 'defaultStatus': 'affected'}] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 13, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 13, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'fa6999e326fe7851ecbd572b8cb9be8e930ebf41', 'lessThan': 'dd25bd9b0f36849808bd7625dcc59dd4c1aeef3e', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa6999e326fe7851ecbd572b8cb9be8e930ebf41', 'lessThan': 'ecc3b8691c1935f9f3e4eb964ab11e40fdec17f5', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa6999e326fe7851ecbd572b8cb9be8e930ebf41', 'lessThan': '013a4484f061a2b41f052e25c0015203287e63f1', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa6999e326fe7851ecbd572b8cb9be8e930ebf41', 'lessThan': '8fa3e9435a13c335efb63fb4f4e77531a0031159', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa6999e326fe7851ecbd572b8cb9be8e930ebf41', 'lessThan': 'a9ae0f6dd45c3ccc1d69363f7aea8af179122730', 'versionType': 'git'}], 'programFiles': ['drivers/s390/crypto/zcrypt_ccamisc.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.10'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.10', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc6', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/s390/crypto/zcrypt_ccamisc.c'], 'defaultStatus': 'affected'}] Added Description 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. Added Reference https://git.kernel.org/stable/c/013a4484f061a2b41f052e25c0015203287e63f1 Added Reference https://git.kernel.org/stable/c/8fa3e9435a13c335efb63fb4f4e77531a0031159 Added Reference https://git.kernel.org/stable/c/a9ae0f6dd45c3ccc1d69363f7aea8af179122730 Added Reference https://git.kernel.org/stable/c/dd25bd9b0f36849808bd7625dcc59dd4c1aeef3e Added Reference https://git.kernel.org/stable/c/ecc3b8691c1935f9f3e4eb964ab11e40fdec17f5