CVE-2024-40948 (GCVE-0-2024-40948)
Vulnerability from cvelistv5 – Published: 2024-07-12 12:31 – Updated: 2026-05-11 20:22
VLAI
EPSS
VEX
Title
mm/page_table_check: fix crash on ZONE_DEVICE
Summary
In the Linux kernel, the following vulnerability has been resolved:
mm/page_table_check: fix crash on ZONE_DEVICE
Not all pages may apply to pgtable check. One example is ZONE_DEVICE
pages: they map PFNs directly, and they don't allocate page_ext at all
even if there's struct page around. One may reference
devm_memremap_pages().
When both ZONE_DEVICE and page-table-check enabled, then try to map some
dax memories, one can trigger kernel bug constantly now when the kernel
was trying to inject some pfn maps on the dax device:
kernel BUG at mm/page_table_check.c:55!
While it's pretty legal to use set_pxx_at() for ZONE_DEVICE pages for page
fault resolutions, skip all the checks if page_ext doesn't even exist in
pgtable checker, which applies to ZONE_DEVICE but maybe more.
Severity
No CVSS data available.
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 17:04 UTC
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
df4e817b710809425d899340dbfa8504a3ca4ba5 , < 51897f99351fff7b57f4f141940fa93b4e90fd2b
(git)
Affected: df4e817b710809425d899340dbfa8504a3ca4ba5 , < 84d3549d54f5ff9fa3281257be3019386f51d1a0 (git) Affected: df4e817b710809425d899340dbfa8504a3ca4ba5 , < dec2382247860d2134c8d41e103e26460c099629 (git) Affected: df4e817b710809425d899340dbfa8504a3ca4ba5 , < 8bb592c2eca8fd2bc06db7d80b38da18da4a2f43 (git) |
guessed | |
| Linux | Linux |
Affected:
5.17
Unaffected: 0 , < 5.17 (semver) Unaffected: 6.1.96 , ≤ 6.1.* (semver) Unaffected: 6.6.36 , ≤ 6.6.* (semver) Unaffected: 6.9.7 , ≤ 6.9.* (semver) Unaffected: 6.10 , ≤ * (original_commit_for_fix) |
guessed |
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"version": "df4e817b710809425d899340dbfa8504a3ca4ba5",
"versionType": "git"
},
{
"lessThan": "84d3549d54f5ff9fa3281257be3019386f51d1a0",
"status": "affected",
"version": "df4e817b710809425d899340dbfa8504a3ca4ba5",
"versionType": "git"
},
{
"lessThan": "dec2382247860d2134c8d41e103e26460c099629",
"status": "affected",
"version": "df4e817b710809425d899340dbfa8504a3ca4ba5",
"versionType": "git"
},
{
"lessThan": "8bb592c2eca8fd2bc06db7d80b38da18da4a2f43",
"status": "affected",
"version": "df4e817b710809425d899340dbfa8504a3ca4ba5",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"mm/page_table_check.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.17"
},
{
"lessThan": "5.17",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.96",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.36",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.9.*",
"status": "unaffected",
"version": "6.9.7",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.10",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.96",
"versionStartIncluding": "5.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.36",
"versionStartIncluding": "5.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.9.7",
"versionStartIncluding": "5.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.10",
"versionStartIncluding": "5.17",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/page_table_check: fix crash on ZONE_DEVICE\n\nNot all pages may apply to pgtable check. One example is ZONE_DEVICE\npages: they map PFNs directly, and they don\u0027t allocate page_ext at all\neven if there\u0027s struct page around. One may reference\ndevm_memremap_pages().\n\nWhen both ZONE_DEVICE and page-table-check enabled, then try to map some\ndax memories, one can trigger kernel bug constantly now when the kernel\nwas trying to inject some pfn maps on the dax device:\n\n kernel BUG at mm/page_table_check.c:55!\n\nWhile it\u0027s pretty legal to use set_pxx_at() for ZONE_DEVICE pages for page\nfault resolutions, skip all the checks if page_ext doesn\u0027t even exist in\npgtable checker, which applies to ZONE_DEVICE but maybe more."
}
],
"providerMetadata": {
"dateUpdated": "2025-05-04T09:18:34.368Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/51897f99351fff7b57f4f141940fa93b4e90fd2b"
},
{
"url": "https://git.kernel.org/stable/c/84d3549d54f5ff9fa3281257be3019386f51d1a0"
},
{
"url": "https://git.kernel.org/stable/c/dec2382247860d2134c8d41e103e26460c099629"
},
{
"url": "https://git.kernel.org/stable/c/8bb592c2eca8fd2bc06db7d80b38da18da4a2f43"
}
],
"title": "mm/page_table_check: fix crash on ZONE_DEVICE",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2024-40948",
"datePublished": "2024-07-12T12:31:53.478Z",
"dateReserved": "2024-07-12T12:17:45.591Z",
"dateUpdated": "2025-05-04T09:18:34.368Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.