CVE-2026-80543
Overview
CVE-2026-80543 is a known-severity vulnerability. It was published on August 26, 2026.
Technical Description
In the Linux kernel, the following vulnerability has been resolved:
s390/zcrypt: Pad trailing CCA or EP11 message with zeros
The both functions xcrb_msg_to_type6cprb_msgx() and
xcrb_msg_to_type6_ep11cprb_msgx() copy the user space message into a
kernel buffer based on the message length. But on further processing
the message is supposed to be 4 byte length adjusted. Thus up to 3
bytes of uninitialized kernel memory are forwarded to further
processing steps and may unwanted expose kernel memory to the crypto
card firmware.
This patch contains code to pad the gap between user space copied
message and message buffer length sent down to further processing of
the CCA or EP11 message to zeros.
Remediation
Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Frequently Asked Questions
What is CVE-2026-80543?
CVE-2026-80543 is a known-severity vulnerability. It was published on August 26, 2026.
How severe is CVE-2026-80543?
CVSS score information is not yet available for this vulnerability. Check back as the CVE record is updated by NVD analysts.
How do I fix or remediate CVE-2026-80543?
Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-80543?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-80543 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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