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Vulnerability DatabaseCVE-2025-38364
CVE-2025-38364:
Linux Kernel vulnerability analysis and mitigation
Overview
CVE-2025-38364 is a vulnerability discovered in the Linux kernel related to the mapletree subsystem, specifically in the handling of the MASTATEPREALLOC flag in the maspreallocate() function. The vulnerability was disclosed on July 25, 2025 (NVD).
Technical details
The vulnerability stems from incorrect handling of the preallocation flag when explicitly requesting allocations in the mapletree subsystem. Pre-existing allocations are counted against the request through masnodecountgfp(), but the allocations fail to occur when the MASTATEPREALLOC flag is set. This flag is intended to prevent re-allocation in bulk allocation mode and detect preallocation calculation issues (NVD).
Impact
The vulnerability manifests as a WARNON() followed by a null pointer dereference when subsequent requests for a larger number of nodes are ignored. This particularly affects the vma merge retry in mmapregion() caused by drivers altering the vma flags, which has been observed in Linux kernel version 6.6 and potentially others (NVD).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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