CVE-2026-46305 Linux CVE debrief

Who should care

Linux kernel developers, Linux distribution maintainers, and users of Linux-based systems should assess exposure and apply patches or updates as needed. This includes operators responsible for managing Linux-based infrastructure, platform administrators, vulnerability management teams, and security teams responsible for monitoring and mitigating potential threats.

Why it matters

This vulnerability in the Linux kernel's rtl8723bs driver can cause system crashes or potentially allow attackers to execute arbitrary code with elevated privileges. Linux kernel developers, Linux distribution maintainers, and users of Linux-based systems should assess exposure and apply patches or updates as needed.

• Potential system crashes due to NULL pointer dereferences
• Possible elevation of privileges for attackers
• Need for patching or updating Linux kernel versions
• Importance of monitoring system logs for errors

Technical summary

The Linux kernel's rtl8723bs driver is vulnerable to a NULL pointer dereference. The kzalloc_flex() function is used to allocate memory, but its return value is not checked for NULL before being dereferenced. This can cause a system crash or potentially allow an attacker to execute arbitrary code with elevated privileges. The vulnerability occurs in the rtw_cbuf_alloc function, where the return value of kzalloc_flex() is used without ensuring that the allocation succeeded, and the pointer is dereferenced unconditionally. Linux kernel developers, Linux distribution maintainers, and users of Linux-based systems should assess exposure and apply patches or updates as needed.

Defensive priority

Medium

Recommended defensive actions

• Review and apply patches from the Linux kernel maintainers
• Update Linux kernel to version 7.0.8 or later
• Monitor system logs for potential NULL pointer dereference errors
• Perform vulnerability assessment to identify potential exposure
• Implement compensating controls for exposed systems
• Track exceptions and retest remediated assets
• Review asset inventory for affected Linux kernel versions

Evidence notes

The CVE record and NVD entry provide details about the vulnerability, including its description, CVSS score, and affected versions. However, the corpus does not establish versions, exploitation, impact, or remediation beyond vendor-supplied information.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.