FKIE_CVE-2024-43893

Vulnerability from fkie_nvd - Published: 2024-08-26 11:15 - Updated: 2025-11-03 22:18
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: serial: core: check uartclk for zero to avoid divide by zero Calling ioctl TIOCSSERIAL with an invalid baud_base can result in uartclk being zero, which will result in a divide by zero error in uart_get_divisor(). The check for uartclk being zero in uart_set_info() needs to be done before other settings are made as subsequent calls to ioctl TIOCSSERIAL for the same port would be impacted if the uartclk check was done where uartclk gets set. Oops: divide error: 0000 PREEMPT SMP KASAN PTI RIP: 0010:uart_get_divisor (drivers/tty/serial/serial_core.c:580) Call Trace: <TASK> serial8250_get_divisor (drivers/tty/serial/8250/8250_port.c:2576 drivers/tty/serial/8250/8250_port.c:2589) serial8250_do_set_termios (drivers/tty/serial/8250/8250_port.c:502 drivers/tty/serial/8250/8250_port.c:2741) serial8250_set_termios (drivers/tty/serial/8250/8250_port.c:2862) uart_change_line_settings (./include/linux/spinlock.h:376 ./include/linux/serial_core.h:608 drivers/tty/serial/serial_core.c:222) uart_port_startup (drivers/tty/serial/serial_core.c:342) uart_startup (drivers/tty/serial/serial_core.c:368) uart_set_info (drivers/tty/serial/serial_core.c:1034) uart_set_info_user (drivers/tty/serial/serial_core.c:1059) tty_set_serial (drivers/tty/tty_io.c:2637) tty_ioctl (drivers/tty/tty_io.c:2647 drivers/tty/tty_io.c:2791) __x64_sys_ioctl (fs/ioctl.c:52 fs/ioctl.c:907 fs/ioctl.c:893 fs/ioctl.c:893) do_syscall_64 (arch/x86/entry/common.c:52 (discriminator 1) arch/x86/entry/common.c:83 (discriminator 1)) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) Rule: add
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3bbd90fca824e6fd61fb20f6dd2b0fa5f8b14bbaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/52b138f1021113e593ee6ad258ce08fe90693a9ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/55b2a5d331a6ceb1c4372945fdb77181265ba24fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/68dc02f319b9ee54dc23caba742a5c754d1cccc8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6eabce6608d6f3440f4c03aa3d3ef50a47a3d193Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9196e42a3b8eeff1707e6ef769112b4b6096be49Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e13ba3fe5ee070f8a9dab60029d52b1f61da5051Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e3ad503876283ac3fcca922a1bf243ef9eb0b0e2Patch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
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 6.11
linux linux_kernel 6.11
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: core: check uartclk for zero to avoid divide by zero\n\nCalling ioctl TIOCSSERIAL with an invalid baud_base can\nresult in uartclk being zero, which will result in a\ndivide by zero error in uart_get_divisor(). The check for\nuartclk being zero in uart_set_info() needs to be done\nbefore other settings are made as subsequent calls to\nioctl TIOCSSERIAL for the same port would be impacted if\nthe uartclk check was done where uartclk gets set.\n\nOops: divide error: 0000  PREEMPT SMP KASAN PTI\nRIP: 0010:uart_get_divisor (drivers/tty/serial/serial_core.c:580)\nCall Trace:\n \u003cTASK\u003e\nserial8250_get_divisor (drivers/tty/serial/8250/8250_port.c:2576\n    drivers/tty/serial/8250/8250_port.c:2589)\nserial8250_do_set_termios (drivers/tty/serial/8250/8250_port.c:502\n    drivers/tty/serial/8250/8250_port.c:2741)\nserial8250_set_termios (drivers/tty/serial/8250/8250_port.c:2862)\nuart_change_line_settings (./include/linux/spinlock.h:376\n    ./include/linux/serial_core.h:608 drivers/tty/serial/serial_core.c:222)\nuart_port_startup (drivers/tty/serial/serial_core.c:342)\nuart_startup (drivers/tty/serial/serial_core.c:368)\nuart_set_info (drivers/tty/serial/serial_core.c:1034)\nuart_set_info_user (drivers/tty/serial/serial_core.c:1059)\ntty_set_serial (drivers/tty/tty_io.c:2637)\ntty_ioctl (drivers/tty/tty_io.c:2647 drivers/tty/tty_io.c:2791)\n__x64_sys_ioctl (fs/ioctl.c:52 fs/ioctl.c:907\n    fs/ioctl.c:893 fs/ioctl.c:893)\ndo_syscall_64 (arch/x86/entry/common.c:52\n    (discriminator 1) arch/x86/entry/common.c:83 (discriminator 1))\nentry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n\nRule: add"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: serial: core: verifique uartclk en busca de cero para evitar la divisi\u00f3n por cero. Llamar a ioctl TIOCSSERIAL con un baud_base no v\u00e1lido puede resultar en que uartclk sea cero, lo que resultar\u00e1 en un error de divisi\u00f3n por cero en uart_get_divisor (). La verificaci\u00f3n de que uartclk sea cero en uart_set_info() debe realizarse antes de realizar otras configuraciones, ya que las llamadas posteriores a ioctl TIOCSSERIAL para el mismo puerto se ver\u00edan afectadas si la verificaci\u00f3n de uartclk se realiz\u00f3 donde se establece uartclk. Vaya: error de divisi\u00f3n: 0000 PREEMPT SMP KASAN PTI RIP: 0010:uart_get_divisor (drivers/tty/serial/serial_core.c:580) Seguimiento de llamadas:  serial8250_get_divisor (drivers/tty/serial/8250/8250_port.c:2576 drivers /tty/serial/8250/8250_port.c:2589) serial8250_do_set_termios (drivers/tty/serial/8250/8250_port.c:502 drivers/tty/serial/8250/8250_port.c:2741) serial8250_set_termios (drivers/tty/serial/ 8250/8250_port.c:2862) uart_change_line_settings (./include/linux/spinlock.h:376 ./include/linux/serial_core.h:608 drivers/tty/serial/serial_core.c:222) uart_port_startup (drivers/tty/ serial/serial_core.c:342) uart_startup (drivers/tty/serial/serial_core.c:368) uart_set_info (drivers/tty/serial/serial_core.c:1034) uart_set_info_user (drivers/tty/serial/serial_core.c:1059) tty_set_serial (drivers/tty/tty_io.c:2637) tty_ioctl (drivers/tty/tty_io.c:2647 drivers/tty/tty_io.c:2791) __x64_sys_ioctl (fs/ioctl.c:52 fs/ioctl.c:907 fs /ioctl.c:893 fs/ioctl.c:893) do_syscall_64 (arch/x86/entry/common.c:52 (discriminador 1) arch/x86/entry/common.c:83 (discriminador 1)) Entry_SYSCALL_64_after_hwframe (arch /x86/entry/entry_64.S:130) Regla: agregar"
    }
  ],
  "id": "CVE-2024-43893",
  "lastModified": "2025-11-03T22:18:17.977",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-08-26T11:15:04.213",
  "references": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-369"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • 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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.