CVE-2024-43893 (GCVE-0-2024-43893)

Vulnerability from cvelistv5 – Published: 2024-08-26 10:10 – Updated: 2026-05-12 11:57
VLAI
Title
serial: core: check uartclk for zero to avoid divide by zero
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
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 3bbd90fca824e6fd61fb20f6dd2b0fa5f8b14bba (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 55b2a5d331a6ceb1c4372945fdb77181265ba24f (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 52b138f1021113e593ee6ad258ce08fe90693a9e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9196e42a3b8eeff1707e6ef769112b4b6096be49 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e13ba3fe5ee070f8a9dab60029d52b1f61da5051 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e3ad503876283ac3fcca922a1bf243ef9eb0b0e2 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 68dc02f319b9ee54dc23caba742a5c754d1cccc8 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6eabce6608d6f3440f4c03aa3d3ef50a47a3d193 (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 4.19.320 , ≤ 4.19.* (semver)
Unaffected: 5.4.282 , ≤ 5.4.* (semver)
Unaffected: 5.10.224 , ≤ 5.10.* (semver)
Unaffected: 5.15.165 , ≤ 5.15.* (semver)
Unaffected: 6.1.105 , ≤ 6.1.* (semver)
Unaffected: 6.6.46 , ≤ 6.6.* (semver)
Unaffected: 6.10.5 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
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Siemens RUGGEDCOM RST2428P Affected: 0 , < V3.1 (custom)
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Siemens RUGGEDCOM RST2428P Unaffected: 0 , < * (custom)
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Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family Unaffected: 0 , < * (custom)
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Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family Affected: 0 , < V3.1 (custom)
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Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family Unaffected: 0 , < * (custom)
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Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
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      "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": "2024-09-10T18:13:21.920",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 5.5, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 1.8, \"impactScore\": 3.6}]}",
      "published": "2024-08-26T11:15:04.213",
      "references": "[{\"url\": \"https://git.kernel.org/stable/c/3bbd90fca824e6fd61fb20f6dd2b0fa5f8b14bba\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/52b138f1021113e593ee6ad258ce08fe90693a9e\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/55b2a5d331a6ceb1c4372945fdb77181265ba24f\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/68dc02f319b9ee54dc23caba742a5c754d1cccc8\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/6eabce6608d6f3440f4c03aa3d3ef50a47a3d193\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/9196e42a3b8eeff1707e6ef769112b4b6096be49\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/e13ba3fe5ee070f8a9dab60029d52b1f61da5051\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/e3ad503876283ac3fcca922a1bf243ef9eb0b0e2\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}]",
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Analyzed",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-369\"}]}]"
    },
    "microsoft_vex": {
      "current_release_date": "2026-02-18T02:15:15.000Z",
      "cve": "CVE-2024-43893",
      "id": "msrc_CVE-2024-43893",
      "initial_release_date": "2024-08-02T00:00:00.000Z",
      "product_status:fixed": "3",
      "product_status:known_affected": "3",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "serial: core: check uartclk for zero to avoid divide by zero",
      "url": "https://msrc.microsoft.com/csaf/vex/2024/msrc_cve-2024-43893.json",
      "version": "2"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-43893\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-08-26T11:15:04.213\",\"lastModified\":\"2026-06-17T07:51:56.710\",\"vulnStatus\":\"Modified\",\"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\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/tty/serial/serial_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"3bbd90fca824e6fd61fb20f6dd2b0fa5f8b14bba\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"55b2a5d331a6ceb1c4372945fdb77181265ba24f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"52b138f1021113e593ee6ad258ce08fe90693a9e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"9196e42a3b8eeff1707e6ef769112b4b6096be49\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"e13ba3fe5ee070f8a9dab60029d52b1f61da5051\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"e3ad503876283ac3fcca922a1bf243ef9eb0b0e2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"68dc02f319b9ee54dc23caba742a5c754d1cccc8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"6eabce6608d6f3440f4c03aa3d3ef50a47a3d193\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/tty/serial/serial_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.12\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.12\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.19.320\",\"lessThanOrEqual\":\"4.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.282\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.224\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.165\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.105\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.46\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.10.5\",\"lessThanOrEqual\":\"6.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.11\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"RUGGEDCOM RST2428P\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"V3.1\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"RUGGEDCOM RST2428P\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"unaffected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"unaffected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"unaffected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SCALANCE XCM-/XRM-/XCH-/XRH-300 family\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"V3.1\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SCALANCE XCM-/XRM-/XCH-/XRH-300 family\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"unaffected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 TM MFP - GNU/Linux subsystem\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-09-10T15:29:15.877067Z\",\"id\":\"CVE-2024-43893\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA 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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2025-11-21T14:33:09+00:00",
      "cve": "CVE-2024-43893",
      "id": "CVE-2024-43893",
      "initial_release_date": "2024-08-26T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: serial: core: check uartclk for zero to avoid divide by zero",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-43893.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-25T01:41:09Z",
      "cve": "CVE-2024-43893",
      "id": "CVE-2024-43893",
      "initial_release_date": "2024-08-27T02:24:31Z",
      "product_status:known_affected": "457",
      "product_status:known_not_affected": "6",
      "product_status:recommended": "732",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-43893",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-43893.json",
      "version": "103"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T22:06:54.168Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-43893\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T15:29:15.877067Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:12.483Z\"}}], \"cna\": {\"title\": \"serial: core: check uartclk for zero to avoid divide by zero\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"3bbd90fca824e6fd61fb20f6dd2b0fa5f8b14bba\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"55b2a5d331a6ceb1c4372945fdb77181265ba24f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"52b138f1021113e593ee6ad258ce08fe90693a9e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"9196e42a3b8eeff1707e6ef769112b4b6096be49\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"e13ba3fe5ee070f8a9dab60029d52b1f61da5051\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"e3ad503876283ac3fcca922a1bf243ef9eb0b0e2\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"68dc02f319b9ee54dc23caba742a5c754d1cccc8\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"6eabce6608d6f3440f4c03aa3d3ef50a47a3d193\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/tty/serial/serial_core.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.12\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.12\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.19.320\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.282\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.224\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.165\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.105\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.46\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10.5\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.10.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/tty/serial/serial_core.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/3bbd90fca824e6fd61fb20f6dd2b0fa5f8b14bba\"}, {\"url\": \"https://git.kernel.org/stable/c/55b2a5d331a6ceb1c4372945fdb77181265ba24f\"}, {\"url\": \"https://git.kernel.org/stable/c/52b138f1021113e593ee6ad258ce08fe90693a9e\"}, {\"url\": \"https://git.kernel.org/stable/c/9196e42a3b8eeff1707e6ef769112b4b6096be49\"}, {\"url\": \"https://git.kernel.org/stable/c/e13ba3fe5ee070f8a9dab60029d52b1f61da5051\"}, {\"url\": \"https://git.kernel.org/stable/c/e3ad503876283ac3fcca922a1bf243ef9eb0b0e2\"}, {\"url\": \"https://git.kernel.org/stable/c/68dc02f319b9ee54dc23caba742a5c754d1cccc8\"}, {\"url\": \"https://git.kernel.org/stable/c/6eabce6608d6f3440f4c03aa3d3ef50a47a3d193\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.320\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.282\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.224\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.165\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.105\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.46\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10.5\", \"versionStartIncluding\": \"2.6.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11\", \"versionStartIncluding\": \"2.6.12\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T20:31:51.254Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-43893\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T20:31:51.254Z\", \"dateReserved\": \"2024-08-17T09:11:59.290Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-08-26T10:10:48.046Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.