CVE-2025-39846

pcmcia: Fix a NULL pointer dereference in __iodyn_find_io_region()

MEDIUM
5.5
CVSS Score
Published: September 19, 2025 at 03:26 PM UTC
Updated: October 19, 2026 at 09:10 PM UTC
15 products affected across 3 vendorsLinux KernelDebian LinuxRUGGEDCOM RST2428P Firmware

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

2.6.35 ≤ v < 5.4.2995.11 ≤ v < 5.15.1925.16 ≤ v < 6.1.1515.5 ≤ v < 5.10.2436.13 ≤ v < 6.16.66.2 ≤ v < 6.6.1056.7 ≤ v < 6.12.462.6.3549b1153adfe18a3cce7e70aa26c690f275917cd06.176.17 rc16.17 rc26.17 rc36.17 rc4
Vendor states this is fixed in 2ee32c4c4f636e474cd8ab7c19a68cf36072ea93 (fixed)
Vendor states this is fixed in 44822df89e8f3386871d9cad563ece8e2fd8f0e7 (fixed)
Vendor states this is fixed in 4bd570f494124608a0696da070f00236a96fb610 (fixed)
Vendor states this is fixed in 5ff2826c998370bf7f9ae26fe802140d220e3510 (fixed)
Vendor states this is fixed in b990c8c6ff50649ad3352507398e443b1e3527b2 (fixed)
Vendor states this is fixed in ce3b7766276894d2fbb07e2047a171f9deb965de (fixed)
Vendor states this is fixed in d7286005e8fde0a430dc180a9f46c088c7d74483 (fixed)
Vendor states this is fixed in fafa7450075f41d232bc785a4ebcbf16374f2076 (fixed)
Vendor states this is fixed in 2.6.35 (unaffected)
Vendor states this is fixed in 5.10.243 (unaffected)
Vendor states this is fixed in 5.15.192 (unaffected)
Vendor states this is fixed in 5.4.299 (unaffected)
Vendor states this is fixed in 6.1.151 (unaffected)
Vendor states this is fixed in 6.12.46 (unaffected)
Vendor states this is fixed in 6.16.6 (unaffected)
Vendor states this is fixed in 6.17 (unaffected)
Vendor states this is fixed in 6.6.105 (unaffected)
v < V3.3
Affected range stops below V3.3, so it looks safe — our inference, not a vendor statement
v < V3.3
Affected range stops below V3.3, so it looks safe — our inference, not a vendor statement
v < V3.3
Affected range stops below V3.3, so it looks safe — our inference, not a vendor statement
v < V3.3
Affected range stops below V3.3, so it looks safe — our inference, not a vendor statement
v < V3.3
Affected range stops below V3.3, so it looks safe — our inference, not a vendor statement
v < V3.3
Affected range stops below V3.3, so it looks safe — our inference, not a vendor statement
v < V3.3
Affected range stops below V3.3, so it looks safe — our inference, not a vendor statement
v < V3.3
Affected range stops below V3.3, so it looks safe — our inference, not a vendor statement

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-476

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