Answer in brief
CVE-2024-43893 records a Unknown severity vulnerability in serial: core: check uartclk for zero to avoid divide by zero. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/RUGGEDCOM RST2428P (generic), Siemens/SCALANCE XCM-/XRM-/XCH-/XRH-300 family (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/RUGGEDCOM RST2428P (generic), Siemens/SCALANCE XCM-/XRM-/XCH-/XRH-300 family (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3bbd90fca824e6fd61fb20f6dd2b0fa5f8b14bba || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <55b2a5d331a6ceb1c4372945fdb77181265ba24f || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <52b138f1021113e593ee6ad258ce08fe90693a9e || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9196e42a3b8eeff1707e6ef769112b4b6096be49 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e13ba3fe5ee070f8a9dab60029d52b1f61da5051 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e3ad503876283ac3fcca922a1bf243ef9eb0b0e2 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <68dc02f319b9ee54dc23caba742a5c754d1cccc8 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6eabce6608d6f3440f4c03aa3d3ef50a47a3d193 | 3bbd90fca824e6fd61fb20f6dd2b0fa5f8b14bba, 55b2a5d331a6ceb1c4372945fdb77181265ba24f, 52b138f1021113e593ee6ad258ce08fe90693a9e, 9196e42a3b8eeff1707e6ef769112b4b6096be49, e13ba3fe5ee070f8a9dab60029d52b1f61da5051, e3ad503876283ac3fcca922a1bf243ef9eb0b0e2, 68dc02f319b9ee54dc23caba742a5c754d1cccc8, 6eabce6608d6f3440f4c03aa3d3ef50a47a3d193 |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
| Siemens/RUGGEDCOM RST2428Pgeneric | >=0 <V3.1 | V3.1 |
| Siemens/SCALANCE XCM-/XRM-/XCH-/XRH-300 familygeneric | >=0 <V3.1 | V3.1 |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <V1.1.1 | V1.1.1 |
Published upstream
Aug 26, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 15, 2026
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
Quoted source text, attributed separately from HOL analysis.