smb: client: use finish_no_open() for non-regular inodes

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98451
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-18 16:16:55 UTC
Updated2026-10-24 14:16:42 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS: 0.001680000 probability, percentile 0.057460000 (date 2026-10-21)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d2c127197dfc0b2bae62a52e1e0d3e3ff493919e 045532f920d86dd76600b635f9756e5fd671ddfc git Not specified
CNA Linux Linux affected d2c127197dfc0b2bae62a52e1e0d3e3ff493919e ed03d547598c92a036f20e89156540995cac889a git Not specified
CNA Linux Linux affected d2c127197dfc0b2bae62a52e1e0d3e3ff493919e 70a7918fda54a06d836acc91eb9a3c7e860fe0a0 git Not specified
CNA Linux Linux affected d2c127197dfc0b2bae62a52e1e0d3e3ff493919e 3c07deb26273155c180aedfd9041ab58015d2521 git Not specified
CNA Linux Linux affected d2c127197dfc0b2bae62a52e1e0d3e3ff493919e e66cf1625ec4a3fe68346119f371def713fd0a4d git Not specified
CNA Linux Linux affected 3.6 Not specified
CNA Linux Linux unaffected 3.6 semver Not specified
CNA Linux Linux unaffected 6.6.160 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.113 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.56 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.9 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/70a7918fda54a06d836acc91eb9a3c7e860fe0a0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e66cf1625ec4a3fe68346119f371def713fd0a4d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ed03d547598c92a036f20e89156540995cac889a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/045532f920d86dd76600b635f9756e5fd671ddfc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3c07deb26273155c180aedfd9041ab58015d2521 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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