CVE-2023-47233 : Security Advisory and Response
Discover the use-after-free vulnerability in brcm80211 component of Linux kernel through 6.5.10. Learn about impact, affected systems, and mitigation steps.
A use-after-free vulnerability has been discovered in the brcm80211 component of the Linux kernel through version 6.5.10. Attackers with local access and in physical proximity could exploit this issue, making it a real-world threat.
Understanding CVE-2023-47233
This section provides an overview of the vulnerability and its impact.
What is CVE-2023-47233?
The brcm80211 component in the Linux kernel through version 6.5.10 is affected by a use-after-free vulnerability in the device unplugging code, potentially leading to exploitation by physically proximate attackers.
The Impact of CVE-2023-47233
For attackers with local access, the use-after-free vulnerability in brcm80211 could be exploited in real-world scenarios, posing a significant security risk.
Technical Details of CVE-2023-47233
Delve into the specifics of the vulnerability.
Vulnerability Description
The vulnerability resides in the brcmf_cfg80211_detach code when disconnecting the USB by hotplug, specifically in the brcmf_cfg80211_escan_timeout_worker in drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c.
Affected Systems and Versions
All Linux kernels through version 6.5.10 that include the brcm80211 component are affected by this vulnerability.
Exploitation Mechanism
Physically proximate attackers with local access can trigger the use-after-free vulnerability in the brcm80211 component by exploiting the device unplugging code.
Mitigation and Prevention
Learn how to mitigate the risks associated with CVE-2023-47233.
Immediate Steps to Take
Users should apply patches from the Linux kernel developers to address this vulnerability promptly and reduce the risk of exploitation.
Long-Term Security Practices
Maintain a proactive security posture by regularly updating the Linux kernel to the latest secure version and implementing security best practices.
Patching and Updates
Stay informed about security updates released by the Linux kernel developers and apply them expediently to protect systems from potential threats.