CVE-2023-53794: cifs: fix session state check in reconnect to avoid use-after-free issue

Critical severity · published Dec 9, 2025

CVE-2023-53794

cifs: fix session state check in reconnect to avoid use-after-free issue

9.8

CVSS

0.5%

EPSS

On KEV

Description

In the Linux kernel, the following vulnerability has been resolved: cifs: fix session state check in reconnect to avoid use-after-free issue Don't collect exiting session in smb2_reconnect_server(), because it will be released soon. Note that the exiting session will stay in server->smb_ses_list until it complete the cifs_free_ipc() and logoff() and then delete itself from the list.

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 43% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Linux · Linux

4fcd1813e6404dd4420c7d12fb483f9320f0bf93 before 7e4f5c3f01fb0e51ca438e43262d858daf9a0a76; 4fcd1813e6404dd4420c7d12fb483f9320f0bf93 before 759ffc164d95a32c09528766d74d9b4fb054e8f4; 4fcd1813e6404dd4420c7d12fb483f9320f0bf93 before 99f280700b4cc02d5f141b8d15f8e9fad0418f65; 655e0c067f0e02ece03fd0591dabe3db2ae27552; 875cc09c0767a4ac06b57af383709657f98b3ea1; 599fe1409085059ba12a2c3897c853be9fa9e7cf; +14 more · source: vendor

Affected product

Linux

All Linux CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2023-53794

CVE.org

https://www.cve.org/CVERecord?id=CVE-2023-53794

git.kernel.org

https://git.kernel.org/stable/c/759ffc164d95a32c09528766d74d9b4fb054e8f4

git.kernel.org

https://git.kernel.org/stable/c/7e4f5c3f01fb0e51ca438e43262d858daf9a0a76

git.kernel.org

https://git.kernel.org/stable/c/99f280700b4cc02d5f141b8d15f8e9fad0418f65