Linux Kernel up to 6.13.5 fbdev-dma drm_fbdev_dma_driver_fbdev_probe null pointer dereference

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.13.5 and classified as critical. The affected element is the function drm_fbdev_dma_driver_fbdev_probe of the component fbdev-dma. Executing a manipulation can lead to null pointer dereference. This vulnerability appears as CVE-2024-58091. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.13.5 and classified as critical. This vulnerability affects the function drm_fbdev_dma_driver_fbdev_probe of the component fbdev-dma. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: drm/fbdev-dma: Add shadow buffering for deferred I/O DMA areas are not necessarily backed by struct page, so we cannot rely on it for deferred I/O. Allocate a shadow buffer for drivers that require deferred I/O and use it as framebuffer memory. Fixes driver errors about being "Unable to handle kernel NULL pointer dereference at virtual address" or "Unable to handle kernel paging request at virtual address". The patch splits drm_fbdev_dma_driver_fbdev_probe() in an initial allocation, which creates the DMA-backed buffer object, and a tail that sets up the fbdev data structures. There is a tail function for direct memory mappings and a tail function for deferred I/O with the shadow buffer. It is no longer possible to use deferred I/O without shadow buffer. It can be re-added if there exists a reliably test for usable struct page in the allocated DMA-backed buffer object.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2024-58091 since 03/06/2025. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 240805 (SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2025:01951-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.13.6 eliminates this vulnerability. Applying the patch cdc581169942de3b9e2648cfbd98c5ff9111c2c8/3603996432997f7c88da37a97062a46cda01ac9d is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (240805), EUVD (EUVD-2025-8496) and CERT Bund (WID-SEC-2025-0649). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

• Google Container-Optimized OS
• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• SUSE openSUSE
• Dell Avamar
• Open Source Linux Kernel
• SolarWinds Security Event Manager
• Dell NetWorker
• Dell Secure Connect Gateway

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.13.0
• 6.13.1
• 6.13.2
• 6.13.3
• 6.13.4
• 6.13.5

License

• open-source

Website

• Vendor: https://www.kernel.org/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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