CVE-2023-54220 (GCVE-0-2023-54220)

Vulnerability from cvelistv5 – Published: 2025-12-30 12:11 – Updated: 2025-12-30 12:11
VLAI?
Title
serial: 8250: Fix oops for port->pm on uart_change_pm()
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().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 490bf37eaabb0a857ed1ae8e75d8854e41662f1c , < 66f3e55960698c874b0598277913b478ecd29573 (git)
Affected: c9e080c3005fd183c56ff8f4d75edb5da0765d2c , < 720a297b334e85d34099e83d1f375b92c3efedd6 (git)
Affected: d5cd2928d31042a7c0a01464f9a8d95be736421d , < b653289ca6460a6552c8590b75dfa84a0140a46b (git)
Affected: 2c86a1305c1406f45ea780d06953c484ea1d9e6e , < bd70d0b28010d560a8be96b44fea86fe2ba016ae (git)
Affected: 1ba5594739d858e524ff0f398ee1ebfe0a8b9d41 , < 18e27df4f2b4e257c317ba8076f31a888f6cc64b (git)
Affected: af4d6dbb1a92ea424ad1ba1d0c88c7fa2345d872 , < 0c05493341d6f2097f75f0a5dbb7b53a9e8c5f6c (git)
Affected: 04e82793f068d2f0ffe62fcea03d007a8cdc16a7 , < 375806616f8c772c33d40e112530887b37c1a816 (git)
Affected: 04e82793f068d2f0ffe62fcea03d007a8cdc16a7 , < dfe2aeb226fd5e19b0ee795f4f6ed8bc494c1534 (git)
Affected: 8e596aed5f2f98cf3e6e98d6fe1d689f4a319308 (git)
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    Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 4.14.324 , ≤ 4.14.* (semver)
Unaffected: 4.19.293 , ≤ 4.19.* (semver)
Unaffected: 5.4.255 , ≤ 5.4.* (semver)
Unaffected: 5.10.192 , ≤ 5.10.* (semver)
Unaffected: 5.15.128 , ≤ 5.15.* (semver)
Unaffected: 6.1.47 , ≤ 6.1.* (semver)
Unaffected: 6.4.12 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/tty/serial/8250/8250_port.c"
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              "version": "0",
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              "status": "unaffected",
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              "status": "unaffected",
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              "version": "6.4.12",
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      "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()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-30T12:11:15.385Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/66f3e55960698c874b0598277913b478ecd29573"
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        {
          "url": "https://git.kernel.org/stable/c/dfe2aeb226fd5e19b0ee795f4f6ed8bc494c1534"
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      ],
      "title": "serial: 8250: Fix oops for port-\u003epm on uart_change_pm()",
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    "cveId": "CVE-2023-54220",
    "datePublished": "2025-12-30T12:11:15.385Z",
    "dateReserved": "2025-12-30T12:06:44.501Z",
    "dateUpdated": "2025-12-30T12:11:15.385Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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