Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2026-80555

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Free all memory if cp_init() fails The routine cp_free() is called to unpin/free any memory once an I/O is compl…

Published Aug 26, 2026EPSS 0.19%

Overview

CVE-2026-80555 is a high-severity vulnerability. It was published on August 26, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

s390/vfio_ccw: Free all memory if cp_init() fails

The routine cp_free() is called to unpin/free any memory once an I/O

is completed successfully, or if cp_prefetch() fails. But if cp_init()

fails, and cp->initialized is not enabled, the same routine cannot be

used to free all the memory.

An attempt to address this exists in ccwchain_handle_ccw(), where a

single call to ccwchain_free() is made for the currently-processed

CCW segment. But this will leak other segments (created as a result

of a Transfer in Channel) that had been allocated as part of the same

channel program.

Address this by performing the cleanup outside of the recursive

ccwchain_handle_ccw()/ccwchain_loop_tic() logic.

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.

References

Refgit.kernel.org/stable/c/152fcb74a26804b70909381c6acc90595a0ae1c1Refgit.kernel.org/stable/c/17e01e342af74de12899c206dcc9ec90684703aaRefgit.kernel.org/stable/c/276bd7ed34d56c48c65c43c0b08f2ee77029b2faRefgit.kernel.org/stable/c/32e3d364a7b8295120d37e6a6bd433d2de26f748Refgit.kernel.org/stable/c/4699b54fada156534cbb39834d47fc9374d7a1f5Refgit.kernel.org/stable/c/6a917199aaf97904f5619afe3dfdacb155b03e8cRefgit.kernel.org/stable/c/74186c2968f8f756ac3226b545b598457c910c75Refgit.kernel.org/stable/c/f9bcff265556796834122f95de16d52a8375206c

How CyberStrike helps

Frequently asked questions

What is CVE-2026-80555?

CVE-2026-80555 is a high-severity vulnerability. It was published on August 26, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-80555?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-80555?

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-2026-80555?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-80555 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related HIGH CVEs from 2026

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999