Priority reviewHigh

CVE-2023-52440

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix slub overflow in ksmbd_decode_ntlmssp_auth_blob() If authblob->SessionKey.Length is bigger than session key size(CIFS_KEY_SIZE), slub overflow can happen in key exchange codes. cifs_arc4_crypt copy to session key array from SessionKey from client.

CVSS: 7.8
EPSS: 21.9%
CISA KEV: Not listed
Published: 2024.02.21

PRIORITY ASSESSMENT

Priority review

FIRST EPSS indicates an elevated probability of exploitation.

Known exploitationNot established by KEV

Exploit probability21.9%

Technical severityCVSS 7.8

Vulnerability overview

Affected product and versions

Product: Linux Linux, linux kernel
Affected versions: >= 0626e6641f6b467447c81dd7678a69c66f7746cf < bd554ed4fdc3d38404a1c43d428432577573e809, >= 0626e6641f6b467447c81dd7678a69c66f7746cf < 30fd6521b2fbd9b767e438e31945e5ea3e3a2fba, >= 0626e6641f6b467447c81dd7678a69c66f7746cf < 7f1d6cb0eb6af3a8088dc24b7ddee9a9711538c4, >= 0626e6641f6b467447c81dd7678a69c66f7746cf < ecd7e1c562cb08e41957fcd4b0e404de5ab38e20, >= 0626e6641f6b467447c81dd7678a69c66f7746cf < 4b081ce0d830b684fdf967abc3696d1261387254, >= 5.15, >= 5.17.0 < 6.1.52, >= 6.2.0 < 6.4.15, >= 6.5.0 < 6.5.2
Fixed versions: 6.1.52, 6.4.15, 6.5.2

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:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-119