Linux Kernel up to 6.6.14/6.7.2 Display link_set_dsc_pps_packet null pointer dereference

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.6.14/6.7.2 and classified as critical. This affects the function link_set_dsc_pps_packet of the component Display Handler. Performing a manipulation results in null pointer dereference. This vulnerability is identified as CVE-2024-26647. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.6.14/6.7.2. This affects the function link_set_dsc_pps_packet of the component Display Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix late derefrence 'dsc' check in 'link_set_dsc_pps_packet()' In link_set_dsc_pps_packet(), 'struct display_stream_compressor *dsc' was dereferenced in a DC_LOGGER_INIT(dsc->ctx->logger); before the 'dsc' NULL pointer check. Fixes the below: drivers/gpu/drm/amd/amdgpu/../display/dc/link/link_dpms.c:905 link_set_dsc_pps_packet() warn: variable dereferenced before check 'dsc' (see line 903)

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2024-26647 since 02/19/2024. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 6.6.15, 6.7.3 or 6.8 eliminates this vulnerability. Applying the patch 6aa5ede66651/cf656fc7276e/3bb9b1f958c3 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.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.6.0
• 6.6.1
• 6.6.2
• 6.6.3
• 6.6.4
• 6.6.5
• 6.6.6
• 6.6.7
• 6.6.8
• 6.6.9
• 6.6.10
• 6.6.11
• 6.6.12
• 6.6.13
• 6.6.14
• 6.7.0
• 6.7.1
• 6.7.2

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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