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Vulnerability DatabaseCVE-2025-39783
CVE-2025-39783:
Linux Kernel vulnerability analysis and mitigation
Overview
CVE-2025-39783 is a vulnerability discovered in the Linux kernel, specifically affecting the PCI endpoint functionality. The vulnerability was disclosed on September 11, 2025, and involves an incorrect handling of configfs group list head in the PCI endpoint driver (NVD, Debian).
Technical details
The vulnerability stems from an incorrect listdel() operation on the epfgroup field of struct pciepfdriver in pciepfremove_cfs(). The field is a list head, but it was being treated as a list entry. This incorrect handling triggers a KASAN warning when an endpoint function driver with a configfs attribute group is being removed, resulting in a slab-use-after-free condition (NVD).
Impact
The vulnerability affects various Linux distributions including Debian Bullseye, Bookworm, and Trixie versions. When triggered, it can lead to a slab-use-after-free condition in the kernel, potentially affecting system stability and security (Debian).
Mitigation and workarounds
The issue has been fixed in Linux kernel version 6.16.5-1 and later. The fix involves removing the incorrect listdel() call from pciepfremovecfs(). Users are advised to upgrade to the fixed version (Debian).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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