What is CVE-2023-45898?

CVE-2023-45898 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Use After Free flaw (CWE-416). CVE-2023-45898 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-45898?

CVE-2023-45898 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-2023-45898?

No patch is currently available for CVE-2023-45898. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2023-45898 actively exploited?

CVE-2023-45898 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2023-45898

High

The Linux kernel before 6.5.4 has an es1 use-after-free in fs/ext4/extents_status.c, related to ext4_es_insert_extent.

Package Linux Kernel

Published 2023-10-16

Last modified 2026-05-12

CVSS version 3.1

Patch available

Awaiting data

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-416

CVE-2023-45898 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2023-45898 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel.org
https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.4

Release Notes
Kernel.org
https://lore.kernel.org/lkml/aa03f191-445c-0d2e-d6d7-0a3208d7df7a%40huawei.com/T/

Third Party Advisory
Cert-Portal
https://cert-portal.siemens.com/productcert/html/ssa-265688.html
Cert-Portal
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
Kernel patch commit
https://github.com/torvalds/linux/commit/768d612f79822d30a1e7d132a4d4b05337ce42ec
Patch
Kernel patch commit
https://lkml.org/lkml/2023/8/13/477
Patch
Kernel patch commit
https://www.spinics.net/lists/stable-commits/msg317086.html
Patch

Details

CVE ID CVE-2023-45898

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2023-10-16

Modified 2026-05-12

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2023-45898?

CVE-2023-45898 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Use After Free flaw (CWE-416) . CVE-2023-45898 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-45898?

CVE-2023-45898 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-2023-45898?

No patch is currently available for CVE-2023-45898. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2023-45898 actively exploited?

No — CVE-2023-45898 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. View CWE-416 on MITRE CWE →