VDB-242196 · CVE-2023-45898 · EUVD-2023-50161

Linux Kernel up to 6.5.3 fs/ext4/extents_status.c ext4_es_insert_extent use after free

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6.5	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Linux Kernel up to 6.5.3. This impacts the function ext4_es_insert_extent of the file fs/ext4/extents_status.c. The manipulation results in use after free. This vulnerability is identified as CVE-2023-45898. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.5.3 (Operating System). It has been classified as problematic. Affected is the function ext4_es_insert_extent of the file fs/ext4/extents_status.c. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was released 10/16/2023 as 768d612f79822d30a1e7d132a4d4b05337ce42ec. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2023-45898 since 10/16/2023. There are known technical details, but no exploit is available.

Upgrading to version 6.5.4 or 6.6-rc1 eliminates this vulnerability. The upgrade is hosted for download at cdn.kernel.org. Applying the patch 768d612f79822d30a1e7d132a4d4b05337ce42ec is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-50161). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

License

open-source

Website

Vendor: https://www.kernel.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.5

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.5.4/6.6-rc1
Patch: 768d612f79822d30a1e7d132a4d4b05337ce42ec

Timelineinfo

10/16/2023 🔍
10/16/2023 +0 days 🔍
10/16/2023 +0 days 🔍
02/12/2026 +850 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: 768d612f79822d30a1e7d132a4d4b05337ce42ec
Status: Confirmed

CVE: CVE-2023-45898 (🔍)
GCVE (CVE): GCVE-0-2023-45898
GCVE (VulDB): GCVE-100-242196
EUVD: 🔍

Entryinfo

Created: 10/16/2023 07:41
Updated: 02/12/2026 16:49
Changes: 10/16/2023 07:41 (45), 11/02/2023 15:04 (11), 08/26/2024 18:16 (16), 02/12/2026 16:49 (1)
Complete: 🔍
Cache ID: 216::103