CVE-2025-40293 (GCVE-0-2025-40293)
Vulnerability from cvelistv5 – Published: 2025-12-08 00:46 – Updated: 2026-05-11 21:46
VLAI
EPSS
VEX
Title
iommufd: Don't overflow during division for dirty tracking
Summary
In the Linux kernel, the following vulnerability has been resolved:
iommufd: Don't overflow during division for dirty tracking
If pgshift is 63 then BITS_PER_TYPE(*bitmap->bitmap) * pgsize will overflow
to 0 and this triggers divide by 0.
In this case the index should just be 0, so reorganize things to divide
by shift and avoid hitting any overflows.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 , < 07105e61882ff4a7d58db63cc5f9e90c6c60506c
(git)
Affected: 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 , < 4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69 (git) Affected: 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 , < de7f2c67ceb1941b05b04ac35458a03e93cc57b1 (git) Affected: 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 , < dbf316fc90aa954dcd5440817f4b944627ed63e0 (git) Affected: 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 , < cb30dfa75d55eced379a42fd67bd5fb7ec38555e (git) |
guessed | |
| Linux | Linux |
Affected:
6.1
Unaffected: 0 , < 6.1 (semver) Unaffected: 6.1.159 , ≤ 6.1.* (semver) Unaffected: 6.6.117 , ≤ 6.6.* (semver) Unaffected: 6.12.58 , ≤ 6.12.* (semver) Unaffected: 6.17.8 , ≤ 6.17.* (semver) Unaffected: 6.18 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/iommu/iommufd/iova_bitmap.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"status": "affected",
"version": "58ccf0190d19d9a8a41f8a02b9e06742b58df4a1",
"versionType": "git"
},
{
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"status": "affected",
"version": "58ccf0190d19d9a8a41f8a02b9e06742b58df4a1",
"versionType": "git"
},
{
"lessThan": "de7f2c67ceb1941b05b04ac35458a03e93cc57b1",
"status": "affected",
"version": "58ccf0190d19d9a8a41f8a02b9e06742b58df4a1",
"versionType": "git"
},
{
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"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/iommu/iommufd/iova_bitmap.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.1"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.159",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.117",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.58",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.17.*",
"status": "unaffected",
"version": "6.17.8",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.18",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.159",
"versionStartIncluding": "6.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.1",
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},
{
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.17.8",
"versionStartIncluding": "6.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18",
"versionStartIncluding": "6.1",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Don\u0027t overflow during division for dirty tracking\n\nIf pgshift is 63 then BITS_PER_TYPE(*bitmap-\u003ebitmap) * pgsize will overflow\nto 0 and this triggers divide by 0.\n\nIn this case the index should just be 0, so reorganize things to divide\nby shift and avoid hitting any overflows."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T21:46:32.879Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/07105e61882ff4a7d58db63cc5f9e90c6c60506c"
},
{
"url": "https://git.kernel.org/stable/c/4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69"
},
{
"url": "https://git.kernel.org/stable/c/de7f2c67ceb1941b05b04ac35458a03e93cc57b1"
},
{
"url": "https://git.kernel.org/stable/c/dbf316fc90aa954dcd5440817f4b944627ed63e0"
},
{
"url": "https://git.kernel.org/stable/c/cb30dfa75d55eced379a42fd67bd5fb7ec38555e"
}
],
"title": "iommufd: Don\u0027t overflow during division for dirty tracking",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-40293",
"datePublished": "2025-12-08T00:46:16.850Z",
"dateReserved": "2025-04-16T07:20:57.185Z",
"dateUpdated": "2026-05-11T21:46:32.879Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2025-40293",
"date": "2026-09-15",
"epss": "0.00201",
"percentile": "0.10158"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2025-40293\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-08T01:16:01.293\",\"lastModified\":\"2026-06-17T09:21:36.540\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\niommufd: Don\u0027t overflow during division for dirty tracking\\n\\nIf pgshift is 63 then BITS_PER_TYPE(*bitmap-\u003ebitmap) * pgsize will overflow\\nto 0 and this triggers divide by 0.\\n\\nIn this case the index should just be 0, so reorganize things to divide\\nby shift and avoid hitting any overflows.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/iommu/iommufd/iova_bitmap.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"58ccf0190d19d9a8a41f8a02b9e06742b58df4a1\",\"lessThan\":\"07105e61882ff4a7d58db63cc5f9e90c6c60506c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"58ccf0190d19d9a8a41f8a02b9e06742b58df4a1\",\"lessThan\":\"4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"58ccf0190d19d9a8a41f8a02b9e06742b58df4a1\",\"lessThan\":\"de7f2c67ceb1941b05b04ac35458a03e93cc57b1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"58ccf0190d19d9a8a41f8a02b9e06742b58df4a1\",\"lessThan\":\"dbf316fc90aa954dcd5440817f4b944627ed63e0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"58ccf0190d19d9a8a41f8a02b9e06742b58df4a1\",\"lessThan\":\"cb30dfa75d55eced379a42fd67bd5fb7ec38555e\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/iommu/iommufd/iova_bitmap.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.1\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.1\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.159\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.117\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.58\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.17.8\",\"lessThanOrEqual\":\"6.17.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/07105e61882ff4a7d58db63cc5f9e90c6c60506c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cb30dfa75d55eced379a42fd67bd5fb7ec38555e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dbf316fc90aa954dcd5440817f4b944627ed63e0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/de7f2c67ceb1941b05b04ac35458a03e93cc57b1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-30T10:31:45+00:00",
"cve": "CVE-2025-40293",
"id": "CVE-2025-40293",
"initial_release_date": "2025-12-08T00:00:00+00:00",
"product_status:known_affected": "184",
"product_status:known_not_affected": "90",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: iommufd: Don\u0027t overflow during division for dirty tracking",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40293.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-12T16:46:54Z",
"cve": "CVE-2025-40293",
"id": "CVE-2025-40293",
"initial_release_date": "2025-12-09T00:24:48Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "482",
"product_status:known_not_affected": "388",
"product_status:recommended": "289",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2025-40293",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-40293.json",
"version": "39"
}
}
}
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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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