Cloud Vulnerability DB
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Vulnerability DatabaseCVE-2025-37894
CVE-2025-37894:
Linux Kernel vulnerability analysis and mitigation
Overview
A vulnerability (CVE-2025-37894) was discovered in the Linux kernel and disclosed on May 20, 2025. The issue affects the networking stack's handling of TCP TIMEWAIT state sockets, specifically in the functions inetlookupestablished() and inet6lookupestablished(). The vulnerability involves improper handling of struct inettimewaitsock pointers (NVD, Wiz).
Technical details
The vulnerability occurs when a pointer of type struct inettimewaitsock is returned from the inetlookupestablished() and inet6lookupestablished() functions. The issue manifests when sockput() is called on this pointer type, leading to a crash when sk->skwmemalloc is accessed in skfree(). The technical solution involves using sockgenput() instead of sockput() when sk->skstate is TCPTIMEWAIT (NVD, RedHat).
Impact
When exploited, this vulnerability can cause a system crash due to improper memory access during socket handling operations. The crash occurs specifically during the call to sockput() on a struct inettimewait_sock pointer (Wiz).
Mitigation and workarounds
The vulnerability has been resolved by implementing a fix that uses sockgenput() instead of sockput() when handling sockets in TCPTIMEWAIT state. This change ensures proper handling of struct inettimewait_sock pointers (Wiz).
Additional resources
Source: This report was generated using AI
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