What is CVE-2023-52440?

CVE-2023-52440 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Buffer Overflow flaw (CWE-119), affecting Linux kernel versions from 5.15 onward and patched in 5.15.145, 6.1.52, 6.4.15 and others. CVE-2023-52440 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-52440?

CVE-2023-52440 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2023-52440?

Yes, CVE-2023-52440 has been patched. Fixed versions include 5.15.145, 6.1.52, 6.4.15 and others. If you are running Linux kernel 5.15 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-52440 actively exploited?

CVE-2023-52440 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Buffer Overflow (CWE-119)?

The product performs operations on a memory buffer but reads or writes outside its intended boundaries. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/119.html

CVE-2023-52440

High

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.

Package Linux Kernel

Published 2024-02-21

Last modified 2024-11-21

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-119

CVE-2023-52440 is a Buffer Overflow vulnerability

What is Buffer Overflow?

The product performs operations on a memory buffer but reads or writes outside its intended boundaries. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.15 and later are affected. Fixed in 5.15.145, 6.1.52, 6.4.15, 6.5.2, 6.6 and their respective stable series.

Affected from

≥ 5.15

Fixed in

✓ 5.15.145 5.15.x ✓ 6.1.52 6.1.x ✓ 6.4.15 6.4.x ✓ 6.5.2 6.5.x ✓ 6.6

References

5 total

Kernel Git
https://git.kernel.org/stable/c/30fd6521b2fbd9b767e438e31945e5ea3e3a2fba

Patch
Kernel Git
https://git.kernel.org/stable/c/4b081ce0d830b684fdf967abc3696d1261387254

Patch
Kernel Git
https://git.kernel.org/stable/c/7f1d6cb0eb6af3a8088dc24b7ddee9a9711538c4

Patch
Kernel Git
https://git.kernel.org/stable/c/bd554ed4fdc3d38404a1c43d428432577573e809

Patch
Kernel Git
https://git.kernel.org/stable/c/ecd7e1c562cb08e41957fcd4b0e404de5ab38e20

Patch

Details

CVE ID CVE-2023-52440

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-02-21

Modified 2024-11-21

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-52440?

CVE-2023-52440 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as a Buffer Overflow flaw (CWE-119) . It affects Linux kernel versions from 5.15 onward and has been patched in 5.15.145, 6.1.52, 6.4.15 and others. CVE-2023-52440 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-52440?

CVE-2023-52440 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2023-52440?

Yes. CVE-2023-52440 has been patched. Fixed versions include 5.15.145, 6.1.52, 6.4.15 and others. If you are running Linux kernel 5.15 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-52440 actively exploited?

No. CVE-2023-52440 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.