CVE-2024-46698 (GCVE-0-2024-46698)
Vulnerability from cvelistv5
Published
2024-09-13 05:29
Modified
2025-05-04 12:58
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: video/aperture: optionally match the device in sysfb_disable() In aperture_remove_conflicting_pci_devices(), we currently only call sysfb_disable() on vga class devices. This leads to the following problem when the pimary device is not VGA compatible: 1. A PCI device with a non-VGA class is the boot display 2. That device is probed first and it is not a VGA device so sysfb_disable() is not called, but the device resources are freed by aperture_detach_platform_device() 3. Non-primary GPU has a VGA class and it ends up calling sysfb_disable() 4. NULL pointer dereference via sysfb_disable() since the resources have already been freed by aperture_detach_platform_device() when it was called by the other device. Fix this by passing a device pointer to sysfb_disable() and checking the device to determine if we should execute it or not. v2: Fix build when CONFIG_SCREEN_INFO is not set v3: Move device check into the mutex Drop primary variable in aperture_remove_conflicting_pci_devices() Drop __init on pci sysfb_pci_dev_is_enabled()
References
Impacted products
Vendor Product Version
Linux Linux Version: 5ae3716cfdcd286268133867f67d0803847acefc
Version: 5ae3716cfdcd286268133867f67d0803847acefc
Version: 485ec8f8e1d8ae12aa1daa5ad345ba8940ad2db7
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