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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 netlbl_conn_setattr(), where addr->sa_family 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 calipso_sock_setattr() is triggered. Inside this function, the code executes 'sk_fullsock(__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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