PT-2026-47380 · Linux · Linux Kernel

Greg Kroah-Hartman

+1

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CVE-2026-46309

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Published

2026-06-08

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Updated

2026-07-24

CVSS v3.1

7.0

High

VectorAV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)
Description An issue exists in the Linux kernel where the xe vm madvise ioctl() function fails to validate Page Attribute Table (PAT) indices. Specifically, using the XE COH NONE coherency mode with CPU cached buffers allows a GPU to bypass CPU caches and read stale, sensitive data directly from DRAM. This occurs because when the kernel clears pages before reallocation, the clear operation may remain in the CPU cache as dirty data, potentially leaking information from previously freed pages belonging to other processes.
Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Memory Leak

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Weakness Enumeration

CWE-524CWE-401

Related Identifiers

CVE-2026-46309
OPENSUSE-SU-2026:11014-1
USN-8566-1
USN-8568-1
USN-8569-1
USN-8593-1
USN-8603-1

Affected Products

Linux Kernel