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CVE-2026-80555

HIGHCVSS 7.1/10

Last modified

CVE-2026-80555 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. 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.

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.

Metrics

CVSS 3.1
7.1/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 8b515be512a2435bb8aedc6390cbe140167f9eb9, < 276bd7ed34d56c48c65c43c0b08f2ee77029b2fa; >= 8b515be512a2435bb8aedc6390cbe140167f9eb9, < f9bcff265556796834122f95de16d52a8375206c; >= 8b515be512a2435bb8aedc6390cbe140167f9eb9, < 17e01e342af74de12899c206dcc9ec90684703aa; >= 8b515be512a2435bb8aedc6390cbe140167f9eb9, < 152fcb74a26804b70909381c6acc90595a0ae1c1; >= 8b515be512a2435bb8aedc6390cbe140167f9eb9, < 6a917199aaf97904f5619afe3dfdacb155b03e8c; >= 8b515be512a2435bb8aedc6390cbe140167f9eb9, < 32e3d364a7b8295120d37e6a6bd433d2de26f748; >= 8b515be512a2435bb8aedc6390cbe140167f9eb9, < 4699b54fada156534cbb39834d47fc9374d7a1f5; >= 8b515be512a2435bb8aedc6390cbe140167f9eb9, < 74186c2968f8f756ac3226b545b598457c910c75
LinuxLinux5.3

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-80555?
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.
How severe is CVE-2026-80555?
CVE-2026-80555 has a CVSS score of 7.1/10 (HIGH severity).
How do I fix CVE-2026-80555?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST