PT-2025-49793 · Linux+3 · Linux Kernel+3
Published
2025-01-01
·
Updated
2026-04-20
·
CVE-2025-40340
CVSS v2.0
5.0
Medium
| Vector | AV:L/AC:H/Au:S/C:P/I:P/A:C |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
An issue exists within the kernel’s DRM/XE subsystem, specifically in the
xe gem fault function, which can lead to an oops (kernel panic) during the execution of core hotunplug tests. This occurs when a process attempts to map memory, unlocks due to fault retry logic, and subsequently runs out of available process memory. This results in ttm bo vm dummy page() returning VM FAULT NOPAGE, leading to a null pointer dereference within mem type is vram() because the tbo->resource is NULL. The issue was observed during testing with the realtime kernel without debug options enabled, following a core hotunplug unbind-rebind operation.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
NULL Pointer Dereference
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Weakness Enumeration
Related Identifiers
Affected Products
Debian
Linuxmint
Linux Kernel
Ubuntu