Medium severity5.5NVD Advisory· Published Sep 19, 2025· Updated May 12, 2026

CVE-2025-39846

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.

Affected products

Linux/Linuxv5
Range: 2.6.35

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlnvdMailing ListThird Party Advisory
lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlnvdMailing ListThird Party Advisory
cert-portal.siemens.com/productcert/html/ssa-032379.htmlnvd
cert-portal.siemens.com/productcert/html/ssa-089022.htmlnvd

News mentions

Siemens SIMATIC
CISA Alerts

Severity

MediumCVSS v3.1

5.5/ 10

Attack vector: Local
Complexity: Low
Privileges: Low
User interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

Probability of exploitation in the next 30 days.

0.02%

VYPR risk score

Composite of severity, exploitation, and reach.

0.36medium

cvss	0.358
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000

Weaknesses

CWE-476
NULL Pointer Dereference

CVE ID

CVE-2025-39846