GHSA-M29H-H248-XJC9

Vulnerability from github – Published: 2025-03-18 21:31 – Updated: 2025-03-18 21:31
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

video: fbdev: smscufx: Fix null-ptr-deref in ufx_usb_probe()

I got a null-ptr-deref report:

BUG: kernel NULL pointer dereference, address: 0000000000000000 ... RIP: 0010:fb_destroy_modelist+0x38/0x100 ... Call Trace: ufx_usb_probe.cold+0x2b5/0xac1 [smscufx] usb_probe_interface+0x1aa/0x3c0 [usbcore] really_probe+0x167/0x460 ... ret_from_fork+0x1f/0x30

If fb_alloc_cmap() fails in ufx_usb_probe(), fb_destroy_modelist() will be called to destroy modelist in the error handling path. But modelist has not been initialized yet, so it will result in null-ptr-deref.

Initialize modelist before calling fb_alloc_cmap() to fix this bug.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2021-47652"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T06:37:06Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvideo: fbdev: smscufx: Fix null-ptr-deref in ufx_usb_probe()\n\nI got a null-ptr-deref report:\n\nBUG: kernel NULL pointer dereference, address: 0000000000000000\n...\nRIP: 0010:fb_destroy_modelist+0x38/0x100\n...\nCall Trace:\n ufx_usb_probe.cold+0x2b5/0xac1 [smscufx]\n usb_probe_interface+0x1aa/0x3c0 [usbcore]\n really_probe+0x167/0x460\n...\n ret_from_fork+0x1f/0x30\n\nIf fb_alloc_cmap() fails in ufx_usb_probe(), fb_destroy_modelist() will\nbe called to destroy modelist in the error handling path. But modelist\nhas not been initialized yet, so it will result in null-ptr-deref.\n\nInitialize modelist before calling fb_alloc_cmap() to fix this bug.",
  "id": "GHSA-m29h-h248-xjc9",
  "modified": "2025-03-18T21:31:59Z",
  "published": "2025-03-18T21:31:59Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47652"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0fd28daec73525382e5c992db8743bf76e42cd5c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1791f487f877a9e83d81c8677bd3e7b259e7cb27"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/64ec3e678d76419f207b9cdd338dda438ca10b1c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9280ef235b05e8f19f8bc6d547b992f0a0ef398d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c420b540db4b5d69de0a36d8b9d9a6a79a04f05a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d1b6a1f0c23b7164250479bf92e2893291dca539"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d396c651e2b508b6179bb678cc029f3becbf5170"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/da8b269cc0a2526ebeaccbe2484c999eb0f822cf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd3a6cc7385b89ec2303f39dfc3bafa4e24cec4b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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