ntfs3: add buffer boundary checks to run_unpack()
In the Linux kernel, the following vulnerability has been resolved: ntfs3: add buffer boundary checks to run_unpack() run_unpack() checks `run_buf < run_last` at the top of the while loop but then reads size_size and offset_size bytes via run_unpack_s64() without verifying they fit within the remaining buffer. A crafted NTFS image with truncated run data in an MFT attribute triggers an OOB heap read of up to 15 bytes when the filesystem is mounted. Add boundary checks before each run_unpack_s64() call to ensure the declared field size does not exceed the remaining buffer. Found by fuzzing with a source-patched harness (LibAFL + QEMU).
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.15.209, 6.1.175, 6.12.86, 6.18.27, 6.6.140, 7.0.4
- CVEs
- CVE-2026-46072
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 05:19 UTC · Revision 1
Source evidence
ntfs3: add buffer boundary checks to run_unpack()
core-osv · Original sourcePublished 27 May 2026, 12:58 UTC
In the Linux kernel, the following vulnerability has been resolved: ntfs3: add buffer boundary checks to run_unpack() run_unpack() checks `run_buf < run_last` at the top of the while loop but then reads size_size and offset_size bytes via run_unpack_s64() without verifying they fit within the remaining buffer. A crafted NTFS image with truncated run data in an MFT attribute triggers an OOB heap read of up to 15 bytes when the filesystem is mounted. Add boundary checks before each run_unpack_s64() call to ensure the declared field size does not exceed the remaining buffer. Found by fuzzing with a source-patched harness (LibAFL + QEMU).
osv:CVE-2026-46072
Kernel
Fixed versions: 5.15.209, 6.1.175, 6.6.140, 6.12.86, 6.18.27, 7.0.4
Complete source record
{
"id": "1d15e61e854dadc37f768a1abfd594ec17ad261317cc2ab78bcff84a4966164f",
"url": "https://osv.dev/vulnerability/CVE-2026-46072",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ntfs3: add buffer boundary checks to run_unpack()",
"summary": "In the Linux kernel, the following vulnerability has been resolved: ntfs3: add buffer boundary checks to run_unpack() run_unpack() checks `run_buf < run_last` at the top of the while loop but then reads size_size and offset_size bytes via run_unpack_s64() without verifying they fit within the remaining buffer. A crafted NTFS image with truncated run data in an MFT attribute triggers an OOB heap read of up to 15 bytes when the filesystem is mounted. Add boundary checks before each run_unpack_s64() call to ensure the declared field size does not exceed the remaining buffer. Found by fuzzing with a source-patched harness (LibAFL + QEMU).",
"evidence": "osv:CVE-2026-46072",
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"evidence": "/affected/1/ranges"
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{
"value": "6.1.175",
"evidence": "/affected/1/ranges"
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"severity": "unknown",
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"package": {
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46072.json"
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],
"modified": "2026-10-28T02:30:26.165912783Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/41aadf5cb482793a24e05aa136224e179a778586",
"https://git.kernel.org/stable/c/425de2aba0d061b3e715d51a3b1992c112ed5b99",
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"https://git.kernel.org/stable/c/bbad75336870b51b81979b97613746237fcb02fe",
"https://git.kernel.org/stable/c/bf7ac4a1d3bfc6e56e54635c3d331a68170d37c9",
"https://git.kernel.org/stable/c/d3012690a7065d9ca86521a525ad11e8af491d45",
"https://git.kernel.org/stable/c/e64f7dfcaff79e7dfff9121a382dd77f9b462f62",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46072.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-46072",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
],
"provider_metadata": {
"cna_assigner": "Linux",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46072.json"
}
},
"related_cves": [
{
"value": "CVE-2026-46072",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 492685,
"published_at": "2026-05-27T12:58:00.299+00:00"
}