CVE-2025-38681 (GCVE-0-2025-38681)
Vulnerability from cvelistv5 – Published: 2025-09-04 15:32 – Updated: 2026-11-10 12:36
VLAI
EPSS
VEX
Title
mm/ptdump: take the memory hotplug lock inside ptdump_walk_pgd()
Summary
In the Linux kernel, the following vulnerability has been resolved:
mm/ptdump: take the memory hotplug lock inside ptdump_walk_pgd()
Memory hot remove unmaps and tears down various kernel page table regions
as required. The ptdump code can race with concurrent modifications of
the kernel page tables. When leaf entries are modified concurrently, the
dump code may log stale or inconsistent information for a VA range, but
this is otherwise not harmful.
But when intermediate levels of kernel page table are freed, the dump code
will continue to use memory that has been freed and potentially
reallocated for another purpose. In such cases, the ptdump code may
dereference bogus addresses, leading to a number of potential problems.
To avoid the above mentioned race condition, platforms such as arm64,
riscv and s390 take memory hotplug lock, while dumping kernel page table
via the sysfs interface /sys/kernel/debug/kernel_page_tables.
Similar race condition exists while checking for pages that might have
been marked W+X via /sys/kernel/debug/kernel_page_tables/check_wx_pages
which in turn calls ptdump_check_wx(). Instead of solving this race
condition again, let's just move the memory hotplug lock inside generic
ptdump_check_wx() which will benefit both the scenarios.
Drop get_online_mems() and put_online_mems() combination from all existing
platform ptdump code paths.
Severity
No CVSS data available.
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 21:06 UTC
Assigner
References
13 references
Impacted products
13 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
bbd6ec605c0fc286c3f8ce60b4ed44635361d58b , < 3ee9a8c27bfd72c3f465004fa8455785d61be5e8
(git)
Affected: bbd6ec605c0fc286c3f8ce60b4ed44635361d58b , < 69bea84b06b5e779627e7afdbf4b60a7d231c76f (git) Affected: bbd6ec605c0fc286c3f8ce60b4ed44635361d58b , < ac25ec5fa2bf6e606dc7954488e4dded272fa9cd (git) Affected: bbd6ec605c0fc286c3f8ce60b4ed44635361d58b , < 1636b5e9c3543b87d673e32a47e7c18698882425 (git) Affected: bbd6ec605c0fc286c3f8ce60b4ed44635361d58b , < ff40839e018b82c4d756d035f34a63aa2d93be83 (git) Affected: bbd6ec605c0fc286c3f8ce60b4ed44635361d58b , < 67995d4244694928ce701928e530b5b4adeb17b4 (git) Affected: bbd6ec605c0fc286c3f8ce60b4ed44635361d58b , < ca8c414499f2e5337a95a76be0d21b728ee31c6b (git) Affected: bbd6ec605c0fc286c3f8ce60b4ed44635361d58b , < 59305202c67fea50378dcad0cc199dbc13a0e99a (git) |
guessed | |
| Linux | Linux |
Affected:
5.7
Unaffected: 0 , < 5.7 (semver) Unaffected: 5.10.241 , ≤ 5.10.* (semver) Unaffected: 5.15.190 , ≤ 5.15.* (semver) Unaffected: 6.1.149 , ≤ 6.1.* (semver) Unaffected: 6.6.103 , ≤ 6.6.* (semver) Unaffected: 6.12.43 , ≤ 6.12.* (semver) Unaffected: 6.15.11 , ≤ 6.15.* (semver) Unaffected: 6.16.2 , ≤ 6.16.* (semver) Unaffected: 6.17 , ≤ * (original_commit_for_fix) |
guessed | |
| Siemens | SIMATIC CN 4100 |
Affected:
0 , < V5.0
(custom)
|
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) |
Affected:
V3.1.6 , < *
(custom)
|
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) |
Affected:
V3.1.7 , < *
(custom)
|
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) |
Affected:
V3.1.6 , < *
(custom)
|
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) |
Affected:
V3.1.7 , < *
(custom)
|
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) |
Affected:
V3.1.6 , < *
(custom)
|
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) |
Affected:
V3.1.7 , < *
(custom)
|
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) |
Affected:
V3.1.6 , < *
(custom)
|
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) |
Affected:
V3.1.7 , < *
(custom)
|
guessed | |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) |
Affected:
V3.1.6 , < *
(custom)
|
guessed | |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) |
Affected:
V3.1.7 , < *
(custom)
|
guessed |
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"status": "affected",
"version": "bbd6ec605c0fc286c3f8ce60b4ed44635361d58b",
"versionType": "git"
},
{
"lessThan": "69bea84b06b5e779627e7afdbf4b60a7d231c76f",
"status": "affected",
"version": "bbd6ec605c0fc286c3f8ce60b4ed44635361d58b",
"versionType": "git"
},
{
"lessThan": "ac25ec5fa2bf6e606dc7954488e4dded272fa9cd",
"status": "affected",
"version": "bbd6ec605c0fc286c3f8ce60b4ed44635361d58b",
"versionType": "git"
},
{
"lessThan": "1636b5e9c3543b87d673e32a47e7c18698882425",
"status": "affected",
"version": "bbd6ec605c0fc286c3f8ce60b4ed44635361d58b",
"versionType": "git"
},
{
"lessThan": "ff40839e018b82c4d756d035f34a63aa2d93be83",
"status": "affected",
"version": "bbd6ec605c0fc286c3f8ce60b4ed44635361d58b",
"versionType": "git"
},
{
"lessThan": "67995d4244694928ce701928e530b5b4adeb17b4",
"status": "affected",
"version": "bbd6ec605c0fc286c3f8ce60b4ed44635361d58b",
"versionType": "git"
},
{
"lessThan": "ca8c414499f2e5337a95a76be0d21b728ee31c6b",
"status": "affected",
"version": "bbd6ec605c0fc286c3f8ce60b4ed44635361d58b",
"versionType": "git"
},
{
"lessThan": "59305202c67fea50378dcad0cc199dbc13a0e99a",
"status": "affected",
"version": "bbd6ec605c0fc286c3f8ce60b4ed44635361d58b",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"arch/arm64/mm/ptdump_debugfs.c",
"arch/riscv/mm/ptdump.c",
"arch/s390/mm/dump_pagetables.c",
"mm/ptdump.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.7"
},
{
"lessThan": "5.7",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.241",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.190",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.149",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.103",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.43",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.15.*",
"status": "unaffected",
"version": "6.15.11",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.16.*",
"status": "unaffected",
"version": "6.16.2",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.17",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.241",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.190",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.149",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.103",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.43",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.15.11",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.16.2",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.17",
"versionStartIncluding": "5.7",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/ptdump: take the memory hotplug lock inside ptdump_walk_pgd()\n\nMemory hot remove unmaps and tears down various kernel page table regions\nas required. The ptdump code can race with concurrent modifications of\nthe kernel page tables. When leaf entries are modified concurrently, the\ndump code may log stale or inconsistent information for a VA range, but\nthis is otherwise not harmful.\n\nBut when intermediate levels of kernel page table are freed, the dump code\nwill continue to use memory that has been freed and potentially\nreallocated for another purpose. In such cases, the ptdump code may\ndereference bogus addresses, leading to a number of potential problems.\n\nTo avoid the above mentioned race condition, platforms such as arm64,\nriscv and s390 take memory hotplug lock, while dumping kernel page table\nvia the sysfs interface /sys/kernel/debug/kernel_page_tables.\n\nSimilar race condition exists while checking for pages that might have\nbeen marked W+X via /sys/kernel/debug/kernel_page_tables/check_wx_pages\nwhich in turn calls ptdump_check_wx(). Instead of solving this race\ncondition again, let\u0027s just move the memory hotplug lock inside generic\nptdump_check_wx() which will benefit both the scenarios.\n\nDrop get_online_mems() and put_online_mems() combination from all existing\nplatform ptdump code paths."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T21:32:55.304Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/3ee9a8c27bfd72c3f465004fa8455785d61be5e8"
},
{
"url": "https://git.kernel.org/stable/c/69bea84b06b5e779627e7afdbf4b60a7d231c76f"
},
{
"url": "https://git.kernel.org/stable/c/ac25ec5fa2bf6e606dc7954488e4dded272fa9cd"
},
{
"url": "https://git.kernel.org/stable/c/1636b5e9c3543b87d673e32a47e7c18698882425"
},
{
"url": "https://git.kernel.org/stable/c/ff40839e018b82c4d756d035f34a63aa2d93be83"
},
{
"url": "https://git.kernel.org/stable/c/67995d4244694928ce701928e530b5b4adeb17b4"
},
{
"url": "https://git.kernel.org/stable/c/ca8c414499f2e5337a95a76be0d21b728ee31c6b"
},
{
"url": "https://git.kernel.org/stable/c/59305202c67fea50378dcad0cc199dbc13a0e99a"
}
],
"title": "mm/ptdump: take the memory hotplug lock inside ptdump_walk_pgd()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-38681",
"datePublished": "2025-09-04T15:32:36.681Z",
"dateReserved": "2025-04-16T04:51:24.031Z",
"dateUpdated": "2026-11-10T12:36:31.053Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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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.