CVE-2023-45898

kernel: use-after-free in fs/ext4/extents_status.c

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Severity

Important

Red Hat Product Security

7.8

CVSS 3.1

Review impact separately from score.

Published · October 23, 2023

Updated · November 22, 2025

Description

A use-after-free flaw was found in the EXT4 file system, related to ext4_es_insert_extent, in the Linux Kernel. This issue may allow an attacker to create a crafted EXT4 file system which will trigger the vulnerability and lead the kernel to PANIC, causing a denial of service on the targeted system.

Statement

The Red Hat Enterprise Linux (all versions) not affected, because previous commit 2a69c45 not applied yet (that is "ext4: using nofail preallocation in ext4_es_insert_extent()").

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-416 · Use After Free