{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-49924",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-49924"
  ],
  "published": "2024-10-21T18:02:47Z",
  "summary": "fbdev: pxafb: Fix possible use after free in pxafb_task()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: pxafb: Fix possible use after free in pxafb_task()\n\nIn the pxafb_probe function, it calls the pxafb_init_fbinfo function,\nafter which &fbi->task is associated with pxafb_task. Moreover,\nwithin this pxafb_init_fbinfo function, the pxafb_blank function\nwithin the &pxafb_ops struct is capable of scheduling work.\n\nIf we remove the module which will call pxafb_remove to make cleanup,\nit will call unregister_framebuffer function which can call\ndo_unregister_framebuffer to free fbi->fb through\nput_fb_info(fb_info), while the work mentioned above will be used.\nThe sequence of operations that may lead to a UAF bug is as follows:\n\nCPU0                                                CPU1\n\n                                   | pxafb_task\npxafb_remove                       |\nunregister_framebuffer(info)       |\ndo_unregister_framebuffer(fb_info) |\nput_fb_info(fb_info)               |\n// free fbi->fb                    | set_ctrlr_state(fbi, state)\n                                   | __pxafb_lcd_power(fbi, 0)\n                                   | fbi->lcd_power(on, &fbi->fb.var)\n                                   | //use fbi->fb\n\nFix it by ensuring that the work is canceled before proceeding\nwith the cleanup in pxafb_remove.\n\nNote that only root user can remove the driver at runtime.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.113",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-49924"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e657fa2df4429f3805a9b3e47fb1a4a1b02a72bd"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6d0a07f68b66269e167def6c0b90a219cd3e7473"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e6897e299f57b103e999e62010b88e363b3eebae"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4cda484e584be34d55ee17436ebf7ad11922b97a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3c0d416eb4bef705f699213cee94bf54b6acdacd"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fdda354f60a576d52dcf90351254714681df4370"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/aaadc0cb05c999ccd8898a03298b7e5c31509b08"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a3a855764dbacbdb1cc51e15dc588f2d21c93e0e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4a6921095eb04a900e0000da83d9475eb958e61e"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:52:36Z"
  }
}