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vuln-cve/data/2024/49xxx/CVE-2024-49894.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2024-49894",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2024-10-21T12:17:06.025Z",
"datePublished": "2024-10-21T18:01:28.360Z",
"dateUpdated": "2026-10-15T00:54:01.423Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-05T11:40:25.727Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix index out of bounds in degamma hardware format translation\n\nFixes index out of bounds issue in\n`cm_helper_translate_curve_to_degamma_hw_format` function. The issue\ncould occur when the index 'i' exceeds the number of transfer function\npoints (TRANSFER_FUNC_POINTS).\n\nThe fix adds a check to ensure 'i' is within bounds before accessing the\ntransfer function points. If 'i' is out of bounds the function returns\nfalse to indicate an error.\n\nReported by smatch:\ndrivers/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\ndrivers/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\ndrivers/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"
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"baseScore": 7.1,
"baseSeverity": "HIGH"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The code is reached only through the DRM atomic modeset ioctl on /dev/dri/cardN when programming a plane or CRTC degamma LUT; there is no network or remote-peer input on this path.\nAC:L - The attacker performs the atomic commit itself, choosing the degamma LUT blob, transfer function and surface pixel format that drive the TF_TYPE_DISTRIBUTED_POINTS path; no race or uncontrollable precondition is involved.\nPR:L - Requires a local unprivileged user holding DRM master on the AMD display device — the ordinary logged-in graphical-session user, or any local user opening an unclaimed card; no CAP_SYS_ADMIN or root is needed.\nUI:N - The attacker triggers the whole sequence from its own process via a single atomic commit; no action by another user or victim is required.\nS:U - Any impact stays within the kernel's own security authority on the same host; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - An unbounded index into tf_pts.red/green/blue reads kernel memory beyond the transfer-function arrays, and those values are propagated into the LUT programmed to the display pipeline, so the out-of-bounds read is not confined to a few bytes.\nI:N - The out-of-range index is used only for reads; the write target rgb_resulted[j] stays bounded by hw_points (192) within the 259-entry array, so no kernel data is corrupted.\nA:H - A read far past the end of the transfer-function arrays can touch unmapped memory and oops in the display hardware-sequencer path, taking down the graphics stack and the kernel."
}
]
}
],
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"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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