CVE-2025-39846
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-19

Last updated on: 2025-11-03

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: pcmcia: Fix a NULL pointer dereference in __iodyn_find_io_region() In __iodyn_find_io_region(), pcmcia_make_resource() is assigned to res and used in pci_bus_alloc_resource(). There is a dereference of res in pci_bus_alloc_resource(), which could lead to a NULL pointer dereference on failure of pcmcia_make_resource(). Fix this bug by adding a check of res.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2025-09-19
Last Modified
2025-11-03
Generated
2026-06-16
AI Q&A
2025-09-19
EPSS Evaluated
2026-06-15
NVD
CVE-2025-39846
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
linux linux_kernel 5.10.244
linux linux_kernel 6.1.153
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

This vulnerability is a NULL pointer dereference in the Linux kernel's pcmcia subsystem, specifically in the function __iodyn_find_io_region(). The issue occurs because the function pcmcia_make_resource() can fail and return NULL, but its result is used without checking for NULL in pci_bus_alloc_resource(), leading to a potential crash or instability. The fix involves adding a check to ensure the pointer is not NULL before it is dereferenced.

Impact Analysis

This vulnerability can cause the Linux kernel to crash or become unstable due to a NULL pointer dereference when handling PCMCIA resources. This could lead to denial of service or system instability on affected systems.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2025-39846. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart