CVE-2026-98451
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: use finish_no_open() for non-regular inodes An O_CREAT open can find an existing symlink or another non-regular inode. cifs_atomic_open() calls finish_open() on it and attaches a cifsFileInfo. Symlink inodes have no CIFS release operation, so the dentry reference held by cifsFileInfo is leaked. FMODE_OPENED also prevents the VFS from following the symlink. Track whether cifs_do_create() returned an open server handle. For non-regular inodes, close the handle if present, remove the pending open, and call finish_no_open() so the VFS can continue the lookup. Do not set FMODE_CREATED unless a regular file was opened. For O_NOFOLLOW with __O_REGULAR, return -ELOOP before the VFS's -EFTYPE check. Defer closing a legacy POSIX handle on a non-regular inode until after inode lookup. This avoids closing it again if lookup fails.
Severity
HIGH
CVSS score
8.8
(v3.1)
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-10-18 16:16:55.437000
Last modified
2026-10-30 13:21:14.093000
View original CVE JSON
{
"id": "CVE-2026-98451",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-10-18T16:16:55.437",
"lastModified": "2026-10-30T13:21:14.093",
"vulnStatus": "Received",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: use finish_no_open() for non-regular inodes\n\nAn O_CREAT open can find an existing symlink or another non-regular\ninode. cifs_atomic_open() calls finish_open() on it and attaches a\ncifsFileInfo. Symlink inodes have no CIFS release operation, so the\ndentry reference held by cifsFileInfo is leaked. FMODE_OPENED also\nprevents the VFS from following the symlink.\n\nTrack whether cifs_do_create() returned an open server handle. For\nnon-regular inodes, close the handle if present, remove the pending\nopen, and call finish_no_open() so the VFS can continue the lookup.\nDo not set FMODE_CREATED unless a regular file was opened. For\nO_NOFOLLOW with __O_REGULAR, return -ELOOP before the VFS's\n-EFTYPE check.\n\nDefer closing a legacy POSIX handle on a non-regular inode until\nafter inode lookup. This avoids closing it again if lookup fails."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"fs/smb/client/dir.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "d2c127197dfc0b2bae62a52e1e0d3e3ff493919e",
"lessThan": "bc585d5a381ab49cb611c35dda93a997214ca874",
"versionType": "git",
"status": "affected"
},
{
"version": "d2c127197dfc0b2bae62a52e1e0d3e3ff493919e",
"lessThan": "26f4bca335e719e291995e28dc434de0145a6a54",
"versionType": "git",
"status": "affected"
},
{
"version": "d2c127197dfc0b2bae62a52e1e0d3e3ff493919e",
"lessThan": "51c7b0593f6eaba05349fd2a01a9cb4df7d7412f",
"versionType": "git",
"status": "affected"
},
{
"version": "d2c127197dfc0b2bae62a52e1e0d3e3ff493919e",
"lessThan": "045532f920d86dd76600b635f9756e5fd671ddfc",
"versionType": "git",
"status": "affected"
},
{
"version": "d2c127197dfc0b2bae62a52e1e0d3e3ff493919e",
"lessThan": "ed03d547598c92a036f20e89156540995cac889a",
"versionType": "git",
"status": "affected"
},
{
"version": "d2c127197dfc0b2bae62a52e1e0d3e3ff493919e",
"lessThan": "70a7918fda54a06d836acc91eb9a3c7e860fe0a0",
"versionType": "git",
"status": "affected"
},
{
"version": "d2c127197dfc0b2bae62a52e1e0d3e3ff493919e",
"lessThan": "3c07deb26273155c180aedfd9041ab58015d2521",
"versionType": "git",
"status": "affected"
},
{
"version": "d2c127197dfc0b2bae62a52e1e0d3e3ff493919e",
"lessThan": "e66cf1625ec4a3fe68346119f371def713fd0a4d",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"fs/smb/client/dir.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "3.6",
"status": "affected"
},
{
"version": "0",
"lessThan": "3.6",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.10.273",
"lessThanOrEqual": "5.10.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.15.224",
"lessThanOrEqual": "5.15.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.191",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.160",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.113",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.56",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2.9",
"lessThanOrEqual": "7.2.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.3",
"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:R/S:U/C:H/I:H/A:H",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "REQUIRED",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 2.8,
"impactScore": 5.9
}
]
},
"references": [
{
"url": "https://git.kernel.org/stable/c/045532f920d86dd76600b635f9756e5fd671ddfc",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/26f4bca335e719e291995e28dc434de0145a6a54",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/3c07deb26273155c180aedfd9041ab58015d2521",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/51c7b0593f6eaba05349fd2a01a9cb4df7d7412f",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/70a7918fda54a06d836acc91eb9a3c7e860fe0a0",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/bc585d5a381ab49cb611c35dda93a997214ca874",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e66cf1625ec4a3fe68346119f371def713fd0a4d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ed03d547598c92a036f20e89156540995cac889a",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}