PT-2025-37522 · Linux+4 · Linux Kernel+4

Published 2023-01-01 · Updated 2026-04-20 · CVE-2023-53149

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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

Description The Linux kernel contains a flaw in the ext4 filesystem implementation that can lead to a deadlock during filesystem reclaim with page writeback. This occurs because the filesystem-wide lock intended to prevent races with journalled data flag switching or inode format changes can cause a deadlock when combined with specific operations during writeback. The deadlock arises when a process attempts to acquire the writepages read-write semaphore (sbi->s writepages rwsem) while another process holds a write lock on the same semaphore, blocking all readers. This can occur when ext4 writepages() is called during filesystem reclaim, potentially blocking indefinitely.

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

Exploit

Improper Locking

Weakness Enumeration

CWE-667

Related Identifiers

ALSA-2025_16880

AZL-70771

BDU:2026-05736

CVE-2023-53149

ECHO-E428-E61B-B583

OESA-2025-2348

OESA-2025-2349

OESA-2025-2350

RHSA-2024:2394

RHSA-2024_2394

SUSE-SU-2025:03614-1

SUSE-SU-2025:03615-1

SUSE-SU-2025:03628-1

SUSE-SU-2025:3716-1

SUSE-SU-2025:3761-1

Affected Products

Debian

Linux Kernel

Red Hat

Suse

Ext4

References · 1013

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53149.json · Exploit
• https://git.kernel.org/stable/c/4b4340bf04ce9a52061f15000ecedd126abc093c · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2023-53357 · Security Note
• https://git.kernel.org/stable/c/00d873c17e29cc32d90ca852b82685f1673acaa5 · Patch
• https://osv.dev/vulnerability/AZL-70771 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-53174 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-53149 · Security Note
• https://bdu.fstec.ru/vul/2026-05736 · Security Note
• https://cve.org/CVERecord?id=CVE-2023-53149 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-39773 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2023-53149 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2023-53149 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-53149 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-50266 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53149 · Vendor Advisory