PT-2025-49664 · Linux+1 · Linux Kernel+1

Published 2023-05-17 · Updated 2026-02-24 · CVE-2023-53804

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 use-after-free issue exists within the nilfs2 file system during the unmount process. Specifically, the nilfs root structure may be accessed after being freed, potentially leading to a system crash or unpredictable behavior. This occurs when inodes remain in a "garbage list" and are released while the file system writer is detached. The issue is addressed by modifying the nilfs evict inode() function to avoid using nilfs root for cleanup operations when the file system is read-only or the writer is detached.

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

Exploit

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

BDU:2026-01460

CVE-2023-53804

SUSE-SU-2026:0263-1

SUSE-SU-2026:0317-1

SUSE-SU-2026:0411-1

SUSE-SU-2026:0617-1

Affected Products

Linux Kernel

Nilfs2

References · 986

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53804.json · Exploit
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53804 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2023-53804 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-53804 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0317-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-53804 · Security Note
• https://ubuntu.com/security/CVE-2023-53804 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-53804 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2023-53804 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-01460 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53804 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0617-1 · 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