Details of VAR-202408-2717

ID

VAR-202408-2717

CVE

CVE-2024-43893

TITLE

Linux of Linux Kernel Division by zero vulnerability in

Trust: 0.8

sources: JVNDB: JVNDB-2024-007776

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. Linux of Linux Kernel Is vulnerable to division by zero.Service operation interruption (DoS) It may be in a state. The RUGGEDCOM RST2428P is a Layer 2 Ethernet switch based on SINEC OS with up to 28 non-blocking interfaces. SCALANCE X switches are used to connect industrial components such as programmable logic controllers (PLCs) and human-machine interfaces (HMIs). Multiple vulnerabilities exist in third-party components prior to SIEMENS SINEC OS V3.2. These vulnerabilities could be exploited to corrupt values, leading to undefined behavior or security issues

Trust: 2.7

sources: NVD: CVE-2024-43893 // JVNDB: JVNDB-2024-007776 // CNVD: CNVD-2025-19346 // CNVD: CNVD-2025-19350

IOT TAXONOMY

category:

['ICS']

sub_category:

Trust: 1.2

sources: CNVD: CNVD-2025-19346 // CNVD: CNVD-2025-19350

AFFECTED PRODUCTS

vendor:	linux	model:	kernel	scope:	eq	version:	6.11	Trust: 1.8
vendor:	linux	model:	kernel	scope:	lt	version:	5.4.282	Trust: 1.0
vendor:	linux	model:	kernel	scope:	gte	version:	5.11	Trust: 1.0
vendor:	linux	model:	kernel	scope:	gte	version:	4.20	Trust: 1.0
vendor:	linux	model:	kernel	scope:	gte	version:	5.5	Trust: 1.0
vendor:	linux	model:	kernel	scope:	lt	version:	6.10.5	Trust: 1.0
vendor:	linux	model:	kernel	scope:	gte	version:	6.2	Trust: 1.0
vendor:	linux	model:	kernel	scope:	gte	version:	5.16	Trust: 1.0
vendor:	linux	model:	kernel	scope:	lt	version:	4.19.320	Trust: 1.0
vendor:	linux	model:	kernel	scope:	lt	version:	5.15.165	Trust: 1.0
vendor:	linux	model:	kernel	scope:	gte	version:	6.7	Trust: 1.0
vendor:	linux	model:	kernel	scope:	lt	version:	6.1.105	Trust: 1.0
vendor:	linux	model:	kernel	scope:	lt	version:	6.6.46	Trust: 1.0
vendor:	linux	model:	kernel	scope:	lt	version:	5.10.224	Trust: 1.0
vendor:	linux	model:	kernel	scope:	eq	version:	5.5 that's all 5.10.224	Trust: 0.8
vendor:	linux	model:	kernel	scope:	eq	version:	4.20 that's all 5.4.282	Trust: 0.8
vendor:	linux	model:	kernel	scope:	eq	version:	-	Trust: 0.8
vendor:	linux	model:	kernel	scope:	eq	version:	6.2 that's all 6.6.46	Trust: 0.8
vendor:	linux	model:	kernel	scope:	eq	version:	5.16 that's all 6.1.105	Trust: 0.8
vendor:	linux	model:	kernel	scope:	eq	version:	6.7 that's all 6.10.5	Trust: 0.8
vendor:	linux	model:	kernel	scope:	eq	version:	5.11 that's all 5.15.165	Trust: 0.8
vendor:	linux	model:	kernel	scope:	eq	version:	4.19.320	Trust: 0.8
vendor:	siemens	model:	ruggedcom rst2428p	scope:	lt	version:	v3.1	Trust: 0.6
vendor:	siemens	model:	scalance xc-300/xr-300/xc-400/xr-500wg/xr-500 family	scope:	lt	version:	v3.1	Trust: 0.6
vendor:	siemens	model:	scalance xcm-/xrm-/xch-/xrh-300 family	scope:	lt	version:	v3.1	Trust: 0.6
vendor:	siemens	model:	ruggedcom rst2428p	scope:	lt	version:	v3.2	Trust: 0.6
vendor:	siemens	model:	scalance xc-300/xr-300/xc-400/xr-500wg/xr-500 family	scope:	lt	version:	v3.2	Trust: 0.6
vendor:	siemens	model:	scalance xcm-/xrm-/xch-/xrh-300 family	scope:	lt	version:	v3.2	Trust: 0.6

sources: CNVD: CNVD-2025-19346 // CNVD: CNVD-2025-19350 // JVNDB: JVNDB-2024-007776 // NVD: CVE-2024-43893

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2024-43893
value:	MEDIUM
Trust: 1.0
NVD:	CVE-2024-43893
value:	MEDIUM
Trust: 0.8
CNVD:	CNVD-2025-19346
value:	HIGH
Trust: 0.6
CNVD:	CNVD-2025-19350
value:	HIGH
Trust: 0.6

CNVD:	CNVD-2025-19346
severity:	HIGH
baseScore:	7.2
vectorString:	AV:L/AC:L/AU:N/C:C/I:C/A:C
accessVector:	LOCAL
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	COMPLETE
integrityImpact:	COMPLETE
availabilityImpact:	COMPLETE
exploitabilityScore:	3.9
impactScore:	10.0
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.6
CNVD:	CNVD-2025-19350
severity:	HIGH
baseScore:	7.2
vectorString:	AV:L/AC:L/AU:N/C:C/I:C/A:C
accessVector:	LOCAL
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	COMPLETE
integrityImpact:	COMPLETE
availabilityImpact:	COMPLETE
exploitabilityScore:	3.9
impactScore:	10.0
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.6

nvd@nist.gov:	CVE-2024-43893
baseSeverity:	MEDIUM
baseScore:	5.5
vectorString:	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
attackVector:	LOCAL
attackComplexity:	LOW
privilegesRequired:	LOW
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	HIGH
exploitabilityScore:	1.8
impactScore:	3.6
version:	3.1
Trust: 1.0
NVD:	CVE-2024-43893
baseSeverity:	MEDIUM
baseScore:	5.5
vectorString:	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
attackVector:	LOCAL
attackComplexity:	LOW
privilegesRequired:	LOW
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	HIGH
exploitabilityScore:	NONE
impactScore:	NONE
version:	3.0
Trust: 0.8

sources: CNVD: CNVD-2025-19346 // CNVD: CNVD-2025-19350 // JVNDB: JVNDB-2024-007776 // NVD: CVE-2024-43893

PROBLEMTYPE DATA

problemtype:	CWE-369	Trust: 1.0
problemtype:	Division by zero (CWE-369) [NVD evaluation ]	Trust: 0.8

sources: JVNDB: JVNDB-2024-007776 // NVD: CVE-2024-43893

PATCH

title:	Linux Kernel Archives	url:	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3bbd90fca824e6fd61fb20f6dd2b0fa5f8b14bba	Trust: 0.8
title:	Patch for Multiple vulnerabilities in Siemens SINEC OS third-party components	url:	https://www.cnvd.org.cn/patchInfo/show/723071	Trust: 0.6
title:	Patch for Multiple vulnerabilities exist in third-party components of SIEMENS SINEC OS V3.2 and earlier	url:	https://www.cnvd.org.cn/patchInfo/show/723061	Trust: 0.6

sources: CNVD: CNVD-2025-19346 // CNVD: CNVD-2025-19350 // JVNDB: JVNDB-2024-007776

EXTERNAL IDS

db:	NVD	id:	CVE-2024-43893	Trust: 2.6
db:	SIEMENS	id:	SSA-613116	Trust: 1.6
db:	SIEMENS	id:	SSA-355557	Trust: 1.6
db:	SIEMENS	id:	SSA-265688	Trust: 1.0
db:	JVN	id:	JVNVU92169998	Trust: 0.8
db:	ICS CERT	id:	ICSA-25-226-07	Trust: 0.8
db:	JVNDB	id:	JVNDB-2024-007776	Trust: 0.8
db:	CNVD	id:	CNVD-2025-19346	Trust: 0.6
db:	CNVD	id:	CNVD-2025-19350	Trust: 0.6

sources: CNVD: CNVD-2025-19346 // CNVD: CNVD-2025-19350 // JVNDB: JVNDB-2024-007776 // NVD: CVE-2024-43893

REFERENCES

url:	https://cert-portal.siemens.com/productcert/html/ssa-613116.html	Trust: 1.6
url:	https://cert-portal.siemens.com/productcert/html/ssa-355557.html	Trust: 1.6
url:	https://git.kernel.org/stable/c/6eabce6608d6f3440f4c03aa3d3ef50a47a3d193	Trust: 1.0
url:	https://git.kernel.org/stable/c/55b2a5d331a6ceb1c4372945fdb77181265ba24f	Trust: 1.0
url:	https://git.kernel.org/stable/c/68dc02f319b9ee54dc23caba742a5c754d1cccc8	Trust: 1.0
url:	https://git.kernel.org/stable/c/52b138f1021113e593ee6ad258ce08fe90693a9e	Trust: 1.0
url:	https://git.kernel.org/stable/c/9196e42a3b8eeff1707e6ef769112b4b6096be49	Trust: 1.0
url:	https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html	Trust: 1.0
url:	https://git.kernel.org/stable/c/3bbd90fca824e6fd61fb20f6dd2b0fa5f8b14bba	Trust: 1.0
url:	https://cert-portal.siemens.com/productcert/html/ssa-265688.html	Trust: 1.0
url:	https://git.kernel.org/stable/c/e3ad503876283ac3fcca922a1bf243ef9eb0b0e2	Trust: 1.0
url:	https://git.kernel.org/stable/c/e13ba3fe5ee070f8a9dab60029d52b1f61da5051	Trust: 1.0
url:	https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html	Trust: 1.0
url:	https://jvn.jp/vu/jvnvu92169998/index.html	Trust: 0.8
url:	https://nvd.nist.gov/vuln/detail/cve-2024-43893	Trust: 0.8
url:	https://www.cisa.gov/news-events/ics-advisories/icsa-25-226-07	Trust: 0.8

sources: CNVD: CNVD-2025-19346 // CNVD: CNVD-2025-19350 // JVNDB: JVNDB-2024-007776 // NVD: CVE-2024-43893

SOURCES

db:	CNVD	id:	CNVD-2025-19346
db:	CNVD	id:	CNVD-2025-19350
db:	JVNDB	id:	JVNDB-2024-007776
db:	NVD	id:	CVE-2024-43893

LAST UPDATE DATE

2026-06-19T21:17:47.407000+00:00

SOURCES UPDATE DATE

db:	CNVD	id:	CNVD-2025-19346	date:	2025-08-22T00:00:00
db:	CNVD	id:	CNVD-2025-19350	date:	2025-08-22T00:00:00
db:	JVNDB	id:	JVNDB-2024-007776	date:	2025-09-02T02:37:00
db:	NVD	id:	CVE-2024-43893	date:	2026-05-12T12:17:08.743

SOURCES RELEASE DATE

db:	CNVD	id:	CNVD-2025-19346	date:	2025-08-12T00:00:00
db:	CNVD	id:	CNVD-2025-19350	date:	2025-08-12T00:00:00
db:	JVNDB	id:	JVNDB-2024-007776	date:	2024-09-11T00:00:00
db:	NVD	id:	CVE-2024-43893	date:	2024-08-26T11:15:04.213