NULL pointer dereference in Linux kernel - CVE-2025-40032
Published: October 28, 2025
Vulnerability identifier: #VU117737
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-40032
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the pci_epf_test_clean_dma_chan() function in drivers/pci/endpoint/functions/pci-epf-test.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2025-40032
Install update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/0c5ce6b6ccc22d486cc7239ed908cb0ae5363a7b
- https://git.kernel.org/stable/c/57f7fb0d1ac28540c0f6405c829bb9c3b89d8dba
- https://git.kernel.org/stable/c/6411f840a9b5c47c00ca8e004733de232553870d
- https://git.kernel.org/stable/c/85afa9ea122dd9d4a2ead104a951d318975dcd25
- https://git.kernel.org/stable/c/fb54ffd60064c4e5139a3eb216e877b1acae1c8b