CVE-2024-26647: linux kernel Null Dereference — Fix

Description

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)

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
linux	linux_kernel	< 6.6.15
linux	linux_kernel	6.7 — 6.7.3

References

Advisories & Patches

https://git.kernel.org/stable/c/3bb9b1f958c3d986ed90a3ff009f1e77e9553207 https://git.kernel.org/stable/c/6aa5ede6665122f4c8abce3c6eba06b49e54d25c https://git.kernel.org/stable/c/cf656fc7276e5b3709a81bc9d9639459be2b2647 https://git.kernel.org/stable/c/3bb9b1f958c3d986ed90a3ff009f1e77e9553207 https://git.kernel.org/stable/c/6aa5ede6665122f4c8abce3c6eba06b49e54d25c https://git.kernel.org/stable/c/cf656fc7276e5b3709a81bc9d9639459be2b2647

Frequently Asked Questions

What is CVE-2024-26647? +

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 has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-26647? +

CVE-2024-26647 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-26647? +

CVE-2024-26647 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-26647? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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