fkie_cve-2021-47652
Vulnerability from fkie_nvd
Published
2025-02-26 06:37
Modified
2025-03-18 19:10
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0fd28daec73525382e5c992db8743bf76e42cd5cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1791f487f877a9e83d81c8677bd3e7b259e7cb27Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/64ec3e678d76419f207b9cdd338dda438ca10b1cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9280ef235b05e8f19f8bc6d547b992f0a0ef398dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c420b540db4b5d69de0a36d8b9d9a6a79a04f05aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d1b6a1f0c23b7164250479bf92e2893291dca539Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d396c651e2b508b6179bb678cc029f3becbf5170Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/da8b269cc0a2526ebeaccbe2484c999eb0f822cfPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dd3a6cc7385b89ec2303f39dfc3bafa4e24cec4bPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

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  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: video: fbdev: smscufx: Corregir null-ptr-deref en ufx_usb_probe() Recib\u00ed un informe de null-ptr-deref: ERROR: desreferencia de puntero NULL del kernel, direcci\u00f3n: 0000000000000000 ... RIP: 0010:fb_destroy_modelist+0x38/0x100 ... Seguimiento de llamadas: ufx_usb_probe.cold+0x2b5/0xac1 [smscufx] usb_probe_interface+0x1aa/0x3c0 [usbcore] really_probe+0x167/0x460 ... ret_from_fork+0x1f/0x30 Si fb_alloc_cmap() falla en ufx_usb_probe(), fb_destroy_modelist() Se llamar\u00e1 a modelist para destruirlo en la ruta de manejo de errores. Pero modelist a\u00fan no se ha inicializado, por lo que dar\u00e1 como resultado null-ptr-deref. Inicialice modelist antes de llamar a fb_alloc_cmap() para corregir este error."
    }
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  "id": "CVE-2021-47652",
  "lastModified": "2025-03-18T19:10:43.653",
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          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
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}


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