fkie_cve-2023-54220
Vulnerability from fkie_nvd
Published
2025-12-30 13:16
Modified
2025-12-31 20:42
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: serial: 8250: Fix oops for port->pm on uart_change_pm() Unloading a hardware specific 8250 driver can produce error "Unable to handle kernel paging request at virtual address" about ten seconds after unloading the driver. This happens on uart_hangup() calling uart_change_pm(). Turns out commit 04e82793f068 ("serial: 8250: Reinit port->pm on port specific driver unbind") was only a partial fix. If the hardware specific driver has initialized port->pm function, we need to clear port->pm too. Just reinitializing port->ops does not do this. Otherwise serial8250_pm() will call port->pm() instead of serial8250_do_pm().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0c05493341d6f2097f75f0a5dbb7b53a9e8c5f6c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/18e27df4f2b4e257c317ba8076f31a888f6cc64b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/375806616f8c772c33d40e112530887b37c1a816
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/66f3e55960698c874b0598277913b478ecd29573
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/720a297b334e85d34099e83d1f375b92c3efedd6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b653289ca6460a6552c8590b75dfa84a0140a46b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bd70d0b28010d560a8be96b44fea86fe2ba016ae
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dfe2aeb226fd5e19b0ee795f4f6ed8bc494c1534
Impacted products
Vendor Product Version


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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: 8250: Fix oops for port-\u003epm on uart_change_pm()\n\nUnloading a hardware specific 8250 driver can produce error \"Unable to\nhandle kernel paging request at virtual address\" about ten seconds after\nunloading the driver. This happens on uart_hangup() calling\nuart_change_pm().\n\nTurns out commit 04e82793f068 (\"serial: 8250: Reinit port-\u003epm on port\nspecific driver unbind\") was only a partial fix. If the hardware specific\ndriver has initialized port-\u003epm function, we need to clear port-\u003epm too.\nJust reinitializing port-\u003eops does not do this. Otherwise serial8250_pm()\nwill call port-\u003epm() instead of serial8250_do_pm()."
    }
  ],
  "id": "CVE-2023-54220",
  "lastModified": "2025-12-31T20:42:43.210",
  "metrics": {},
  "published": "2025-12-30T13:16:10.300",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0c05493341d6f2097f75f0a5dbb7b53a9e8c5f6c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/18e27df4f2b4e257c317ba8076f31a888f6cc64b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/375806616f8c772c33d40e112530887b37c1a816"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/66f3e55960698c874b0598277913b478ecd29573"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/720a297b334e85d34099e83d1f375b92c3efedd6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b653289ca6460a6552c8590b75dfa84a0140a46b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bd70d0b28010d560a8be96b44fea86fe2ba016ae"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/dfe2aeb226fd5e19b0ee795f4f6ed8bc494c1534"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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