CVE - CVE-2024-43893

CVE-ID
CVE-2024-43893	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/3bbd90fca824e6fd61fb20f6dd2b0fa5f8b14bba URL:https://git.kernel.org/stable/c/3bbd90fca824e6fd61fb20f6dd2b0fa5f8b14bba MISC:https://git.kernel.org/stable/c/52b138f1021113e593ee6ad258ce08fe90693a9e URL:https://git.kernel.org/stable/c/52b138f1021113e593ee6ad258ce08fe90693a9e MISC:https://git.kernel.org/stable/c/55b2a5d331a6ceb1c4372945fdb77181265ba24f URL:https://git.kernel.org/stable/c/55b2a5d331a6ceb1c4372945fdb77181265ba24f MISC:https://git.kernel.org/stable/c/68dc02f319b9ee54dc23caba742a5c754d1cccc8 URL:https://git.kernel.org/stable/c/68dc02f319b9ee54dc23caba742a5c754d1cccc8 MISC:https://git.kernel.org/stable/c/6eabce6608d6f3440f4c03aa3d3ef50a47a3d193 URL:https://git.kernel.org/stable/c/6eabce6608d6f3440f4c03aa3d3ef50a47a3d193 MISC:https://git.kernel.org/stable/c/9196e42a3b8eeff1707e6ef769112b4b6096be49 URL:https://git.kernel.org/stable/c/9196e42a3b8eeff1707e6ef769112b4b6096be49 MISC:https://git.kernel.org/stable/c/e13ba3fe5ee070f8a9dab60029d52b1f61da5051 URL:https://git.kernel.org/stable/c/e13ba3fe5ee070f8a9dab60029d52b1f61da5051 MISC:https://git.kernel.org/stable/c/e3ad503876283ac3fcca922a1bf243ef9eb0b0e2 URL:https://git.kernel.org/stable/c/e3ad503876283ac3fcca922a1bf243ef9eb0b0e2
Assigning CNA
kernel.org
Date Record Created
20240817	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240817)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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