CVE-2026-93063
Linux · Kernel
A buffer overflow vulnerability exists in the Linux kernel iwlwifi mei driver due to insufficient validation of SAP message lengths before reading into a local buffer.
Executive summary
A buffer overflow vulnerability in the Linux kernel iwlwifi mei driver could allow an attacker to achieve memory corruption, potentially leading to system compromise.
Vulnerability
This is a memory safety flaw involving a buffer overflow in the iwlwifi mei subsystem. The vulnerability occurs because the kernel fails to verify that the incoming SAP message size fits within the allocated local buffer, allowing for out of bounds memory access.
Business impact
The vulnerability carries a CVSS score of 8.4, classifying it as High severity. Successful exploitation could lead to arbitrary code execution, total system compromise, or persistent denial of service, significantly impacting data confidentiality, integrity, and availability. While the vector is local, the potential for kernel level code execution makes this a critical risk for systems utilizing the affected wireless hardware drivers.
Remediation
Immediate Action: Update the Linux kernel to the patched versions: 6.1.188, 6.6.157, 6.12.110, or 6.18.52, depending on the distribution branch in use.
Proactive Monitoring: Monitor system logs for kernel panics, segmentation faults, or unusual driver behavior related to the iwlwifi mei interface.
Compensating Controls: Ensure that kernel hardening features such as KASLR and stack canaries are enabled to mitigate the impact of potential memory corruption attempts.
Exploitation status
Public Exploit Available: No (exploit_available: false)
Analyst recommendation
Given the severity of potential kernel level exploitation, administrators should prioritize applying the provided kernel patches as soon as they are made available by their respective Linux distribution maintainers. Verification of the patch application should be performed by checking the kernel version string post reboot.
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History
CVE Brief tracked this CVE 2 days before it had a CVSS score.
- Disclosed CVE record published
- Collected by CVE Brief No CVSS score yet; tracked as early warning
- CVSS score assigned 8.4 (3.1)
- Analyst report written