CVE-2025-39846: pcmcia: Fix a NULL pointer dereference in __iodyn_find_io_region()

Medium severity · published Sep 19, 2025

CVE-2025-39846

pcmcia: Fix a NULL pointer dereference in __iodyn_find_io_region()

5.5

CVSS

0.2%

EPSS

On KEV

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 vector

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

Attack vector

Local

Complexity

Low

Privileges

Low

User interaction

None

Confidentiality

None

Integrity

None

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.2% · higher than 6% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Kernel · Linux

2.6.35 before 5.4.299; 5.5 before 5.10.243; 5.11 before 5.15.192; 5.16 before 6.1.151; 6.2 before 6.6.105; 6.7 before 6.12.46; +5 more · source: NVD

Linux · Linux

49b1153adfe18a3cce7e70aa26c690f275917cd0 before b990c8c6ff50649ad3352507398e443b1e3527b2; 49b1153adfe18a3cce7e70aa26c690f275917cd0 before 5ff2826c998370bf7f9ae26fe802140d220e3510; 49b1153adfe18a3cce7e70aa26c690f275917cd0 before 4bd570f494124608a0696da070f00236a96fb610; 49b1153adfe18a3cce7e70aa26c690f275917cd0 before ce3b7766276894d2fbb07e2047a171f9deb965de; 49b1153adfe18a3cce7e70aa26c690f275917cd0 before 2ee32c4c4f636e474cd8ab7c19a68cf36072ea93; 49b1153adfe18a3cce7e70aa26c690f275917cd0 before fafa7450075f41d232bc785a4ebcbf16374f2076; +3 more · source: vendor

Debian Linux · Debian

11.0 · source: NVD

RUGGEDCOM RST2428P · Siemens

before V3.3 · source: CISA

SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family · Siemens

before V3.3 · source: CISA

SCALANCE XCH328 · Siemens

before V3.3 · source: CISA

SCALANCE XCM324 · Siemens

before V3.3 · source: CISA

SCALANCE XCM328 · Siemens

before V3.3 · source: CISA

SCALANCE XCM332 · Siemens

before V3.3 · source: CISA

SCALANCE XRH334 (24 V DC, 8xFO, CC) · Siemens

before V3.3 · source: CISA

SCALANCE XRM334 (230 V AC, 12xFO) · Siemens

before V3.3 · source: CISA

SCALANCE XRM334 (230 V AC, 8xFO) · Siemens

before V3.3 · source: CISA

In the news

VulnerabilityHigh

Siemens SINEC OS

View CSAF Summary SINEC OS before V3.3 contains third-party components with multiple vulnerabilities. Siemens has released new versions for the affected products and recommends to update to the latest versions. The following versions of Siemens SINEC OS are affected: RUGGEDCOM RST2428P (6GK6242-6PA00) vers:intdot/<3.3 (CVE-2022-48174, CVE-2023-7256, CVE-2023-39810, CVE-2023-42363, CVE-2023-42364, CVE-2023-42365, CVE-2023-42366, CVE-2024-6197, CVE-2024-6874, CVE-2024-7264, CVE-2024-8006, CVE-2024-8096, CVE-2024-9681, CVE-2024-11053, CVE-2024-12718, CVE-2024-41996, CVE-2024-47619, CVE-2024-52533, CVE-2025-0167, CVE-2025-0665, CVE-2025-0725, CVE-2025-1390, CVE-2025-3360, CVE-2025-4138, CVE-2025-4330, CVE-2025-4373, CVE-2025-4435, CVE-2025-4516, CVE-2025-4517, CVE-2025-6141, CVE-2025-9086, CVE-2025-9230, CVE-2025-9231, CVE-2025-9232, CVE-2025-10148, CVE-2025-27587, CVE-2025-32433, CVE-2025-38084, CVE-2025-38085, CVE-2025-38086, CVE-2025-38345, CVE-2025-38350, CVE-2025-38498, CVE-2025-39839, CVE-2025-39841, CVE-2025-39846, CVE-2025-39853, CVE-2025-39860, CVE-2025-39864, CVE-2025-39865, CVE-2025-59375) SCALANCE XCH328 (6GK5328-4TS01-2EC2) vers:intdot/<3.3 (CVE-2022-48174, CVE-2023-7256, CVE-2023-39810, CVE-2023-42363, CVE-2023-42364, CVE-2023-42365, CVE-2023-42366, CVE-2024-6197, CVE-2024-6874, CVE-2024-7264, CVE-2024-8006, CVE-2024-8096, CVE-2024-9681, CVE-2024-11053, CVE-2024-12718, CVE-2024-41996, CVE-2024-47619, CVE-2024-52533, CVE-2025-0167, CVE-2025-0665...

CVE-2022-48174 CVE-2023-7256 CVE-2023-39810

Feb 12, 2026·CISA Advisories

Affected product

Kernel

Linux

All Kernel CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2025-39846

CVE.org

https://www.cve.org/CVERecord?id=CVE-2025-39846

Patch