cifs: fix potential race when tree connecting ipc

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2023-54280
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-12-30 13:16:16 UTC
Updated2026-10-15 22:17:57 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: cifs: fix potential race when tree connecting ipc Protect access of TCP_Server_Info::hostname when building the ipc tree name as it might get freed in cifsd thread and thus causing an use-after-free bug in __tree_connect_dfs_target(). Also, while at it, update status of IPC tcon on success and then avoid any extra tree connects.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.004470000 probability, percentile 0.366880000 (date 2026-08-06)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c88f7dcd6d6429197fc2fd87b54a894ffcd48e8e 536ec71ba060a02fabe8e22cecb82fe7b3a8708b git Not specified
CNA Linux Linux affected c88f7dcd6d6429197fc2fd87b54a894ffcd48e8e 553476df55a111e6a66ad9155256aec0ec1b7ad0 git Not specified
CNA Linux Linux affected c88f7dcd6d6429197fc2fd87b54a894ffcd48e8e ee20d7c6100752eaf2409d783f4f1449c29ea33d git Not specified
CNA Linux Linux affected 81d583baa5f1abd73c755ce1992929debd20b687 git Not specified
CNA Linux Linux affected 5.15.81 5.16 semver Not specified
CNA Linux Linux affected 5.16 Not specified
CNA Linux Linux unaffected 5.16 semver Not specified
CNA Linux Linux unaffected 6.2.15 6.2.* semver Not specified
CNA Linux Linux unaffected 6.3.2 6.3.* semver Not specified
CNA Linux Linux unaffected 6.4 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/536ec71ba060a02fabe8e22cecb82fe7b3a8708b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/553476df55a111e6a66ad9155256aec0ec1b7ad0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ee20d7c6100752eaf2409d783f4f1449c29ea33d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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