{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-35950",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2024-35950"
  ],
  "published": "2024-05-20T09:42:41Z",
  "summary": "drm/client: Fully protect modes[] with dev->mode_config.mutex",
  "details": "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.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-35950"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5a2f957e3c4553bbb100504a1acfeaeb33f4ca4e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/41586487769eede64ab1aa6c65c74cbf76c12ef0"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d2dc6600d4e3e1453e3b1fb233e9f97e2a1ae949"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/18c8cc6680ce938d0458859b6a08b4d34f7d8055"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/04e018bd913d3d3336ab7d21c2ad31a9175fe984"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8ceb873d816786a7c8058f50d903574aff8d3764"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3eadd887dbac1df8f25f701e5d404d1b90fd0fea"
    }
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:52:36Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 7.8,
      "cvss_v3_severity": "High",
      "scenario": "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 \u2014 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 \u2014 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 \u2014 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 \u2014 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 \u2014 the reporting freedesktop bug (drm/intel#10583) is a crash."
    }
  }
}