{"id":"CVE-2024-43893","revision":null,"records":[{"revision":"b4578fa25020486fb36d4664b0dcd514","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2024-43893","aliases":[],"title":"serial: core: check uartclk for zero to avoid divide by zero","description":"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 \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","state":0,"publishedAt":"2024-08-26T10:10:48.046+00:00","modifiedAt":"2026-10-15T00:49:09.415+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/tty/serial/serial_core.c\"\n ],\n \"versions\": [\n {\n \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n \"lessThan\": \"3bbd90fca824e6fd61fb20f6dd2b0fa5f8b14bba\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n \"lessThan\": \"55b2a5d331a6ceb1c4372945fdb77181265ba24f\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n \"lessThan\": \"52b138f1021113e593ee6ad258ce08fe90693a9e\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n \"lessThan\": \"9196e42a3b8eeff1707e6ef769112b4b6096be49\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n \"lessThan\": \"e13ba3fe5ee070f8a9dab60029d52b1f61da5051\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n \"lessThan\": \"e3ad503876283ac3fcca922a1bf243ef9eb0b0e2\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n \"lessThan\": \"68dc02f319b9ee54dc23caba742a5c754d1cccc8\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n \"lessThan\": \"6eabce6608d6f3440f4c03aa3d3ef50a47a3d193\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/tty/serial/serial_core.c\"\n ],\n \"versions\": [\n {\n \"version\": \"2.6.12\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"2.6.12\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"4.19.320\",\n \"lessThanOrEqual\": \"4.19.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.4.282\",\n \"lessThanOrEqual\": \"5.4.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.224\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.165\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.105\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.46\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.10.5\",\n \"lessThanOrEqual\": \"6.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.11\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/3bbd90fca824e6fd61fb20f6dd2b0fa5f8b14bba","https://git.kernel.org/stable/c/55b2a5d331a6ceb1c4372945fdb77181265ba24f","https://git.kernel.org/stable/c/52b138f1021113e593ee6ad258ce08fe90693a9e","https://git.kernel.org/stable/c/9196e42a3b8eeff1707e6ef769112b4b6096be49","https://git.kernel.org/stable/c/e13ba3fe5ee070f8a9dab60029d52b1f61da5051","https://git.kernel.org/stable/c/e3ad503876283ac3fcca922a1bf243ef9eb0b0e2","https://git.kernel.org/stable/c/68dc02f319b9ee54dc23caba742a5c754d1cccc8","https://git.kernel.org/stable/c/6eabce6608d6f3440f4c03aa3d3ef50a47a3d193"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-43893","license":"CVE Program Terms of Use","key":"cve-program:CVE-2024-43893","identifiers":["CVE-2024-43893"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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