CVE-2026-43387

Analyzed Analyzed - Analysis Complete

Buffer Overflow in Linux Kernel RTL8723BS Driver

Publication date: 2026-05-08

Last updated on: 2026-05-26

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: properly validate the data in rtw_get_ie_ex() Just like in commit 154828bf9559 ("staging: rtl8723bs: fix out-of-bounds read in rtw_get_ie() parser"), we don't trust the data in the frame so we should check the length better before acting on it

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-05-08

Last Modified

2026-05-26

Generated

2026-07-09

AI Q&A

2026-05-08

EPSS Evaluated

2026-07-08

NVD

CVE-2026-43387

EUVD

EUVD-2026-28693

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	From 6.2 (inc) to 6.6.130 (exc)
linux	linux_kernel	From 5.11 (inc) to 5.15.203 (exc)
linux	linux_kernel	From 5.16 (inc) to 6.1.167 (exc)
linux	linux_kernel	From 6.13 (inc) to 6.18.19 (exc)
linux	linux_kernel	From 6.7 (inc) to 6.12.78 (exc)
linux	linux_kernel	From 6.19 (inc) to 6.19.9 (exc)
linux	linux_kernel	From 4.12 (inc) to 5.10.253 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability exists in the Linux kernel's rtl8723bs staging driver. It involves improper validation of data in the function rtw_get_ie_ex(). Specifically, the code does not sufficiently check the length of the data before processing it, which can lead to out-of-bounds reads.

The issue was addressed by improving the validation of the data length in the rtw_get_ie_ex() function, similar to a previous fix for a related out-of-bounds read in the rtw_get_ie() parser.

Impact Analysis

An out-of-bounds read vulnerability like this can potentially lead to information disclosure or cause the system to behave unexpectedly, such as crashing or exposing sensitive memory contents.

Since this vulnerability is in a kernel driver, exploitation could affect system stability or security, depending on how the driver is used and the environment in which the kernel operates.

Hi! I’m here to help you understand CVE-2026-43387. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70