Kernel memory disclosure via unchecked degamma index
Published Oct 21, 2024 · Updated Aug 5, 2026
Out-of-bounds access in the Linux kernel allows local users to disclose kernel memory or crash the host via an AMD display ioctl. cm_helper_translate_curve_to_degamma_hw_format permits an index beyond TRANSFER_FUNC_POINTS and reads past the red, green, and blue transfer-function arrays. Exploitation requires DRM-master access to an AMD display device and a crafted atomic modeset; no network path or separate user interaction is involved.
Summary
What happened
Out-of-bounds access in the Linux kernel allows local users to disclose kernel memory or crash the host via an AMD display ioctl. cm_helper_translate_curve_to_degamma_hw_format permits an index beyond TRANSFER_FUNC_POINTS and reads past the red, green, and blue transfer-function arrays. Exploitation requires DRM-master access to an AMD display device and a crafted atomic modeset; no network path or separate user interaction is involved.
The record
- CVE
- CVE-2024-49894
- Published
- Oct 21, 2024
- Updated
- Aug 5, 2026
- Vendor
- Siemens
- Product
- SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
- Classifications
- CWE-129
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 21, 2024CVE publishedPublication date reported by the CVE source.
- Aug 5, 2026Record updatedLatest update available in the CVE record.
Exploitability
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- Affected versionversion=0 <*
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What is affected?
Published CVSS scores
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Attacks
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Technologies
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Your stack
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