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Vulnerability DatabaseCVE-2025-22063
CVE-2025-22063:
Linux Kernel vulnerability analysis and mitigation
Overview
CVE-2025-22063 is a vulnerability discovered in the Linux kernel's netlabel subsystem, specifically related to a NULL pointer exception caused by CALIPSO on IPv4 sockets. The vulnerability was disclosed on April 16, 2025 (NVD).
Technical details
The vulnerability occurs when calling netlblconnsetattr(), where addr->safamily is used to determine the function behavior. If an IPv4 socket is used but the connect function is called with an IPv6 address, the function calipsosocksetattr() is triggered. Inside this function, the code executes 'skfullsock(sk) ? inet_sk(sk)->pinet6 : NULL', which leads to a null pointer dereference since pinet6 is NULL for IPv4 sockets (Debian Tracker).
Impact
The vulnerability could lead to a NULL pointer dereference in the Linux kernel, potentially causing system crashes or denial of service conditions (NVD).
Mitigation and workarounds
The issue has been fixed by implementing a check to verify if inet6_sk(sk) returns a NULL pointer before accessing pinet6. The fix has been incorporated into Linux kernel version 6.12.25-1 and later versions (Debian Tracker).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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