CVE-2025-39846 (GCVE-0-2025-39846)
Vulnerability from cvelistv5 – Published: 2025-09-19 15:26 – Updated: 2026-05-12 12:07
VLAI
EPSS
VEX
Title
pcmcia: Fix a NULL pointer dereference in __iodyn_find_io_region()
Summary
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.
Severity
5.5 (Medium)
Assigner
References
12 references
Impacted products
19 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
49b1153adfe18a3cce7e70aa26c690f275917cd0 , < b990c8c6ff50649ad3352507398e443b1e3527b2
(git)
Affected: 49b1153adfe18a3cce7e70aa26c690f275917cd0 , < 5ff2826c998370bf7f9ae26fe802140d220e3510 (git) Affected: 49b1153adfe18a3cce7e70aa26c690f275917cd0 , < 4bd570f494124608a0696da070f00236a96fb610 (git) Affected: 49b1153adfe18a3cce7e70aa26c690f275917cd0 , < ce3b7766276894d2fbb07e2047a171f9deb965de (git) Affected: 49b1153adfe18a3cce7e70aa26c690f275917cd0 , < 2ee32c4c4f636e474cd8ab7c19a68cf36072ea93 (git) Affected: 49b1153adfe18a3cce7e70aa26c690f275917cd0 , < fafa7450075f41d232bc785a4ebcbf16374f2076 (git) Affected: 49b1153adfe18a3cce7e70aa26c690f275917cd0 , < d7286005e8fde0a430dc180a9f46c088c7d74483 (git) Affected: 49b1153adfe18a3cce7e70aa26c690f275917cd0 , < 44822df89e8f3386871d9cad563ece8e2fd8f0e7 (git) |
guessed | |
| Linux | Linux |
Affected:
2.6.35
Unaffected: 0 , < 2.6.35 (semver) Unaffected: 5.4.299 , ≤ 5.4.* (semver) Unaffected: 5.10.243 , ≤ 5.10.* (semver) Unaffected: 5.15.192 , ≤ 5.15.* (semver) Unaffected: 6.1.151 , ≤ 6.1.* (semver) Unaffected: 6.6.105 , ≤ 6.6.* (semver) Unaffected: 6.12.46 , ≤ 6.12.* (semver) Unaffected: 6.16.6 , ≤ 6.16.* (semver) Unaffected: 6.17 , ≤ * (original_commit_for_fix) |
guessed | |
| Siemens | RUGGEDCOM RST2428P |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XCH328 |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XCM324 |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XCM328 |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XCM332 |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XRH334 (24 V DC, 8xFO, CC) |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XRM334 (230 V AC, 12xFO) |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XRM334 (230 V AC, 8xFO) |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XRM334 (230V AC, 2x10G, 24xSFP, 8xSFP+) |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XRM334 (24 V DC, 12xFO) |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XRM334 (24 V DC, 8xFO) |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XRM334 (24V DC, 2x10G, 24xSFP, 8xSFP+) |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XRM334 (2x230 V AC, 12xFO) |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XRM334 (2x230 V AC, 8xFO) |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SCALANCE XRM334 (2x230V AC, 2x10G, 24xSFP, 8xSFP+) |
Affected:
0 , < V3.3
(custom)
|
guessed | |
| Siemens | SIMATIC CN 4100 |
Affected:
0 , < V5.0
(custom)
|
guessed |
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"cna": {
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],
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"nvd": "{\"cve\":{\"id\":\"CVE-2025-39846\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-19T16:15:43.397\",\"lastModified\":\"2026-06-17T09:18:36.790\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\npcmcia: Fix a NULL pointer dereference in __iodyn_find_io_region()\\n\\nIn __iodyn_find_io_region(), pcmcia_make_resource() is assigned to\\nres and used in pci_bus_alloc_resource(). There is a dereference of res\\nin pci_bus_alloc_resource(), which could lead to a NULL pointer\\ndereference on failure of pcmcia_make_resource().\\n\\nFix this bug by adding a check of res.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/pcmcia/rsrc_iodyn.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"49b1153adfe18a3cce7e70aa26c690f275917cd0\",\"lessThan\":\"b990c8c6ff50649ad3352507398e443b1e3527b2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"49b1153adfe18a3cce7e70aa26c690f275917cd0\",\"lessThan\":\"5ff2826c998370bf7f9ae26fe802140d220e3510\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"49b1153adfe18a3cce7e70aa26c690f275917cd0\",\"lessThan\":\"4bd570f494124608a0696da070f00236a96fb610\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"49b1153adfe18a3cce7e70aa26c690f275917cd0\",\"lessThan\":\"ce3b7766276894d2fbb07e2047a171f9deb965de\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"49b1153adfe18a3cce7e70aa26c690f275917cd0\",\"lessThan\":\"2ee32c4c4f636e474cd8ab7c19a68cf36072ea93\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"49b1153adfe18a3cce7e70aa26c690f275917cd0\",\"lessThan\":\"fafa7450075f41d232bc785a4ebcbf16374f2076\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"49b1153adfe18a3cce7e70aa26c690f275917cd0\",\"lessThan\":\"d7286005e8fde0a430dc180a9f46c088c7d74483\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"49b1153adfe18a3cce7e70aa26c690f275917cd0\",\"lessThan\":\"44822df89e8f3386871d9cad563ece8e2fd8f0e7\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/pcmcia/rsrc_iodyn.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.35\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.35\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.299\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.243\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.192\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.151\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.105\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.46\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.16.6\",\"lessThanOrEqual\":\"6.16.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.17\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"RUGGEDCOM 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4100\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"V5.0\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.6.35\",\"versionEndExcluding\":\"5.4.299\",\"matchCriteriaId\":\"B136765F-6063-4DE4-ADDA-534A9EC84F83\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.243\",\"matchCriteriaId\":\"6DE4B49A-F1A3-4F0C-96D3-68676CE6BB4C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.192\",\"matchCriteriaId\":\"8A911BD7-361F-45C0-A4A6-33FCBA0F6117\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.151\",\"matchCriteriaId\":\"BC2D0B88-F133-4143-B91D-0A439AA143C0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.105\",\"matchCriteriaId\":\"B9364B0C-6B18-422E-8254-73EF0E856875\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.46\",\"matchCriteriaId\":\"F7E2B332-E920-4CAC-B400-288602DB6F16\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.16.6\",\"matchCriteriaId\":\"548F104C-0F08-438B-9C97-64C903F0C678\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"327D22EF-390B-454C-BD31-2ED23C998A1C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"C730CD9A-D969-4A8E-9522-162AAF7C0EE9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"39982C4B-716E-4B2F-8196-FA301F47807D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"340BEEA9-D70D-4290-B502-FBB1032353B1\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FA6FEEC2-9F11-4643-8827-749718254FED\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2ee32c4c4f636e474cd8ab7c19a68cf36072ea93\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/44822df89e8f3386871d9cad563ece8e2fd8f0e7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4bd570f494124608a0696da070f00236a96fb610\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5ff2826c998370bf7f9ae26fe802140d220e3510\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b990c8c6ff50649ad3352507398e443b1e3527b2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ce3b7766276894d2fbb07e2047a171f9deb965de\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d7286005e8fde0a430dc180a9f46c088c7d74483\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/fafa7450075f41d232bc785a4ebcbf16374f2076\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-032379.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-089022.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"}]}}",
"redhat_vex": {
"aggregate_severity": "None",
"current_release_date": "2026-06-30T10:33:58+00:00",
"cve": "CVE-2025-39846",
"id": "CVE-2025-39846",
"initial_release_date": "2025-09-19T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: pcmcia: Fix a NULL pointer dereference in __iodyn_find_io_region()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-39846.json",
"version": "3"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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