CVE-2023-53751

Critical

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.

Package Linux Kernel
Published 2025-12-08
Last modified 2026-08-04
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

9.8

out of 10
Critical
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected versions

Linux kernel versions 5.0 and later are affected. Fixed in 6.1.28, 6.2.15, 6.3.2, 6.4 and their respective stable series.

Affected from
≥ 5.0
Fixed in
✓ 6.1.28 6.1.x ✓ 6.2.15 6.2.x ✓ 6.3.2 6.3.x ✓ 6.4

References

4 total

Frequently asked questions

  • What is CVE-2023-53751?

    CVE-2023-53751 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10 . It affects Linux kernel versions from 5.0 onward and has been patched in 6.1.28, 6.2.15, 6.3.2 and others. CVE-2023-53751 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2023-53751?

    CVE-2023-53751 has a CVSS score of 9.8 out of 10, rated Critical severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H .

  • Is there a patch available for CVE-2023-53751?

    Yes. CVE-2023-53751 has been patched. Fixed versions include 6.1.28, 6.2.15, 6.3.2 and others. If you are running Linux kernel 5.0 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2023-53751 actively exploited?

    No. CVE-2023-53751 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Back to
All CVEs
View on
NVD / NIST