CVE-2026-64160
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: netfs: Fix potential for tearing in ->remote_i_size and ->zero_point Fix potential tearing in using ->remote_i_size and ->zero_point by copying i_size_read() and i_size_write() and using the same seqcount as for i_size. We need to make sure that netfslib and the filesystems that use it always hold i_lock whilst updating any of the sizes to prevent i_size_seqcount from getting corrupted.
Severity
CRITICAL
CVSS score
9.8
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-07-19 16:17:58.010000
Last modified
2026-10-19 21:17:25.743000
View original CVE JSON
{
"id": "CVE-2026-64160",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-07-19T16:17:58.010",
"lastModified": "2026-10-19T21:17:25.743",
"vulnStatus": "Modified",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix potential for tearing in ->remote_i_size and ->zero_point\n\nFix potential tearing in using ->remote_i_size and ->zero_point by copying\ni_size_read() and i_size_write() and using the same seqcount as for i_size.\n\nWe need to make sure that netfslib and the filesystems that use it always\nhold i_lock whilst updating any of the sizes to prevent i_size_seqcount\nfrom getting corrupted."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"fs/9p/v9fs_vfs.h",
"fs/9p/vfs_inode.c",
"fs/9p/vfs_inode_dotl.c",
"fs/afs/file.c",
"fs/afs/inode.c",
"fs/afs/internal.h",
"fs/afs/write.c",
"fs/netfs/buffered_read.c",
"fs/netfs/buffered_write.c",
"fs/netfs/direct_write.c",
"fs/netfs/misc.c",
"fs/netfs/write_collect.c",
"fs/smb/client/cifsfs.c",
"fs/smb/client/cifssmb.c",
"fs/smb/client/file.c",
"fs/smb/client/inode.c",
"fs/smb/client/readdir.c",
"fs/smb/client/smb2ops.c",
"fs/smb/client/smb2pdu.c",
"include/linux/netfs.h"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "4058f742105ecfcbdf99e1139e6c1f74fb8e6db9",
"lessThan": "55970f238d495517edc961d55c44c772594d0969",
"versionType": "git",
"status": "affected"
},
{
"version": "4058f742105ecfcbdf99e1139e6c1f74fb8e6db9",
"lessThan": "2c8f4742bb76117d735f92a3932d85239b16c494",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"fs/9p/v9fs_vfs.h",
"fs/9p/vfs_inode.c",
"fs/9p/vfs_inode_dotl.c",
"fs/afs/file.c",
"fs/afs/inode.c",
"fs/afs/internal.h",
"fs/afs/write.c",
"fs/netfs/buffered_read.c",
"fs/netfs/buffered_write.c",
"fs/netfs/direct_write.c",
"fs/netfs/misc.c",
"fs/netfs/write_collect.c",
"fs/smb/client/cifsfs.c",
"fs/smb/client/cifssmb.c",
"fs/smb/client/file.c",
"fs/smb/client/inode.c",
"fs/smb/client/readdir.c",
"fs/smb/client/smb2ops.c",
"fs/smb/client/smb2pdu.c",
"include/linux/netfs.h"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "5.18",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.18",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.0.11",
"lessThanOrEqual": "7.0.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.1",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 3.9,
"impactScore": 5.9
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-10-16T15:37:03.470970Z",
"id": "CVE-2026-64160",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
]
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-362"
}
]
}
],
"configurations": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.18",
"versionEndExcluding": "7.0.11",
"matchCriteriaId": "0DB20DAA-322B-469E-BE32-85C48AAC7796"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*",
"matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*",
"matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*",
"matchCriteriaId": "EC732D08-5F7B-46D9-B154-E60C7F4F0A97"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*",
"matchCriteriaId": "E5910A9D-F60A-409A-B486-FE66BFEBA9B9"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/2c8f4742bb76117d735f92a3932d85239b16c494",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://git.kernel.org/stable/c/55970f238d495517edc961d55c44c772594d0969",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
}
]
}