Review reviewHigh

CVE-2023-53358

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix racy issue under cocurrent smb2 tree disconnect There is UAF issue under cocurrent smb2 tree disconnect. This patch introduce TREE_CONN_EXPIRE flags for tcon to avoid cocurrent access.

CVSS: 7
EPSS: 0.35%
CISA KEV: Not listed
Published: 2025.09.18

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.35%

Technical severityCVSS 7

Vulnerability overview

Affected product and versions

Product: Linux Linux, linux kernel
Affected versions: >= 0626e6641f6b467447c81dd7678a69c66f7746cf < b36295c17fb97424406f0c3ab321b1ccaabb9be8, >= 0626e6641f6b467447c81dd7678a69c66f7746cf < bd80d35725a0cf4df9307bfe2f1a3b2cb983d8e6, >= 0626e6641f6b467447c81dd7678a69c66f7746cf < dc1c17716c099c90948ebb83e2170dd75a3be6b6, >= 0626e6641f6b467447c81dd7678a69c66f7746cf < 39366b47a59d46af15ac57beb0996268bf911f6a, >= 0626e6641f6b467447c81dd7678a69c66f7746cf < 30210947a343b6b3ca13adc9bfc88e1543e16dd5, >= 5.15, >= 5.15 < 5.15.145, >= 5.16 < 6.1.28, >= 6.2 < 6.2.15, >= 6.3 < 6.3.2
Fixed versions: 5.15.145, 6.1.28, 6.2.15, 6.3.2

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Linux Linux, linux kernel 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:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-416