CVE-2023-54280: cifs: fix potential race when tree connecting ipc

Critical severity · published Dec 30, 2025

CVE-2023-54280

cifs: fix potential race when tree connecting ipc

9.8

CVSS

0.5%

EPSS

On KEV

Description

In 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.

CVSS vector

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

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

High

Integrity

High

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.5% · higher than 44% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Linux · Linux

c88f7dcd6d6429197fc2fd87b54a894ffcd48e8e before 536ec71ba060a02fabe8e22cecb82fe7b3a8708b; c88f7dcd6d6429197fc2fd87b54a894ffcd48e8e before 553476df55a111e6a66ad9155256aec0ec1b7ad0; c88f7dcd6d6429197fc2fd87b54a894ffcd48e8e before ee20d7c6100752eaf2409d783f4f1449c29ea33d; 81d583baa5f1abd73c755ce1992929debd20b687; 5.15.81 before 5.16; 5.16 · source: vendor

Affected product

Linux

All Linux CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2023-54280

CVE.org

https://www.cve.org/CVERecord?id=CVE-2023-54280

git.kernel.org

https://git.kernel.org/stable/c/536ec71ba060a02fabe8e22cecb82fe7b3a8708b

git.kernel.org

https://git.kernel.org/stable/c/553476df55a111e6a66ad9155256aec0ec1b7ad0

git.kernel.org

https://git.kernel.org/stable/c/ee20d7c6100752eaf2409d783f4f1449c29ea33d