363 lines
17 KiB
JSON
363 lines
17 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"cveMetadata": {
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"cveId": "CVE-2024-35950",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-05-17T13:50:33.134Z",
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"datePublished": "2024-05-20T09:41:45.333Z",
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"dateUpdated": "2026-10-15T00:41:39.227Z"
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},
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"containers": {
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"cna": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:31:09.668Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/client: Fully protect modes[] with dev->mode_config.mutex\n\nThe modes[] array contains pointers to modes on the connectors'\nmode lists, which are protected by dev->mode_config.mutex.\nThus we need to extend modes[] the same protection or by the\ntime we use it the elements may already be pointing to\nfreed/reused memory."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The race is driven through the DRM primary node `/dev/dri/card0` (`DRM_IOCTL_MODE_GETCONNECTOR`) and the in-kernel fbdev client; no network or physical access is involved.\nAC:L - The attacker controls both sides of the race — forced connector reprobes both generate the hotplug event that starts `drm_client_modeset_probe()` and perform the `drm_mode_prune_invalid()` free inside the unlocked window — and can retry the loop indefinitely while spraying the freed kmalloc slot.\nPR:L - An ordinary unprivileged local user needs only an open fd on the primary DRM node, which logind ACLs / the `video` group grant to the session user; `DRM_IOCTL_MODE_GETCONNECTOR` carries ioctl flags `0` (no DRM_AUTH, no CAP_SYS_ADMIN), and master is auto-granted to the first opener on console/headless/embedded systems.\nUI:N - No victim action is required; the attacker's own threads generate the hotplug events and the concurrent reprobes.\nS:U - The corruption stays within the kernel's own security authority — no VM, IOMMU, or sandbox boundary is crossed.\nC:H - `drm_mode_duplicate()` copies a full freed `drm_display_mode` out of a reallocatable kmalloc object, and `mode->name` is read too, giving a use-after-free read of attacker-groomed heap contents that partially surfaces via fbdev `FBIOGET_VSCREENINFO`.\nI:H - The stale slab contents are copied into `modeset->mode` and then used to program CRTC timings, so a use-after-free with controlled reuse lets the attacker inject arbitrary data into live kernel display state — the standard heap-spray primitive for control-flow corruption.\nA:H - Dereferencing freed `drm_display_mode` objects reliably oopses the kernel, and garbage timings pushed to the display engine hang the GPU/console — the reporting freedesktop bug (drm/intel#10583) is a crash."
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}
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]
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}
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],
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"affected": [
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/gpu/drm/drm_client_modeset.c"
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