high CVSS 7.8

CVE-2024-49894·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix index out of bounds in degamma hardware format translation Fixes index out of bounds issue in `cm_helper_translate_curve_to_degamma_hw_format` function. The issue could occur when the index 'i' exceeds the number of transfer function points (TRANSFER_FUNC_POINTS). The fix adds a check to ensure 'i' is within bounds before accessing the transfer function points. If 'i' is out of bounds the function returns false to indicate an error. Reported by smatch: drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_cm_common.c:594 cm_helper_translate_curve_to_degamma_hw_format() error: buffer overflow 'output_tf->tf_pts.red' 1025 <= s32max drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_cm_common.c:595 cm_helper_translate_curve_to_degamma_hw_format() error: buffer overflow 'output_tf->tf_pts.green' 1025 <= s32max drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_cm_common.c:596 cm_helper_translate_curve_to_degamma_hw_format() error: buffer overflow 'output_tf->tf_pts.blue' 1025 <= s32max

Severity: high
Software: Kernel
Fixed in: 6.11.3
Published: 2024-10-21

Affected versions

From: 6.11

Until: 6.11.3

Fixed in: 6.11.3

How to fix this CVE

Update your Linux kernel to version 6.11.3 or later to address a buffer overflow vulnerability in AMD display driver's degamma hardware format translation function. This fix prevents out-of-bounds memory access that could occur during color space conversion operations on AMD GPUs. Systems running kernel versions 6.11 through 6.11.2 should prioritize this update.

sudo dnf update kernel kernel-devel

Defensia detects this vulnerability

How to check if you are affected

Run 'uname -r' to check your current kernel version; versions 6.11.0 through 6.11.2 are vulnerable
Check if AMD GPU drivers are active with 'lspci | grep -i amd' and 'lsmod | grep amdgpu'
Search kernel logs for degamma-related errors: 'dmesg | grep -i degamma' or 'journalctl -u kernel | grep degamma'
After patching, verify the new kernel version with 'uname -r' and confirm it shows 6.11.3 or later

FAQ

What is CVE-2024-49894?

This vulnerability is a buffer overflow in the Linux kernel's AMD display driver, specifically in the degamma (inverse gamma correction) hardware format conversion function. When processing certain color space transfer functions, the code could write beyond allocated buffer boundaries on systems with AMD GPUs.

Is CVE-2024-49894 being actively exploited?

No, this vulnerability is not currently listed on CISA's Known Exploited Vulnerabilities catalog and no public exploits are available. However, it should still be addressed promptly due to its high severity rating.

What versions of Kernel are affected by CVE-2024-49894?

Linux kernel versions 6.11 through 6.11.2 are vulnerable. The fix was included starting in version 6.11.3.

How do I check if my server is vulnerable to CVE-2024-49894?

Run 'uname -r' to display your kernel version. If it shows 6.11.0, 6.11.1, or 6.11.2 and you have AMD GPUs with amdgpu driver loaded ('lsmod | grep amdgpu'), your system is vulnerable.

Does Defensia detect CVE-2024-49894?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If the Linux kernel is installed on a monitored server, CVE-2024-49894 will appear in your dashboard with remediation steps.

Related Kernel CVEs

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References

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