PT-2025-54151 · Ext4+1 · Ext4+1

Published 2023-02-18 · Updated 2026-02-24 · CVE-2023-54305

Positive Technologies (AI Summary)

CVSS v2.0

4.6

Medium

Base vector

AV:L/AC:L/Au:S/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A flaw exists in the Linux kernel's ext4 filesystem implementation. Specifically, the issue involves handling extended attribute (ea) block expansion during unmounting. The process requires access to s root which is set to NULL during unmount, leading to a potential kernel panic. The issue is resolved by refusing to create an ea block when the filesystem is in the process of being unmounted.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Improper Resource Release

Weakness Enumeration

CWE-404

Related Identifiers

BDU:2026-01182

CVE-2023-54305

SUSE-SU-2026:0263-1

SUSE-SU-2026:0317-1

SUSE-SU-2026:0411-1

SUSE-SU-2026:0617-1

Affected Products

Linux Kernel

Ext4

References · 988

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54305.json · Exploit
• https://ubuntu.com/security/CVE-2023-54305 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-54305 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-54305 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-54305 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2026:0317-1 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-01182 · Security Note
• https://cve.org/CVERecord?id=CVE-2023-54305 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-54305 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2023-54305 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0617-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-54305 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0411-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0263-1 · Vendor Advisory
• https://bugzilla.suse.com/1255996 · Note