Review reviewCritical

CVE-2023-53751

Linux

In the Linux kernel, the following vulnerability has been resolved: cifs: fix potential use-after-free bugs in TCP_Server_Info::hostname TCP_Server_Info::hostname may be updated once or many times during reconnect, so protect its access outside reconnect path as well and then prevent any potential use-after-free bugs.

CVSS: 9.8
EPSS: 0.40%
CISA KEV: Not listed
Published: 2025.12.08

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.40%

Technical severityCVSS 9.8

Vulnerability overview

Affected product and versions

Product: Linux
Affected versions: >= 93d5cb517db39e8af8d1292f9e785e4983b7f708 < 64d62ac6d6514cba1305bd08e271ec1843bdd612, >= 93d5cb517db39e8af8d1292f9e785e4983b7f708 < c511954bf142fe1995aec3c739a9f1a76990283a, >= 93d5cb517db39e8af8d1292f9e785e4983b7f708 < 0b08c4c499200be67d54c439d56e5ea866869945, >= 93d5cb517db39e8af8d1292f9e785e4983b7f708 < 90c49fce1c43e1cc152695e20363ff5087897c09, >= 5.0
Fixed versions: No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Linux and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE: Not available