PT-2024-14721 · Linux+2 · Linux Kernel+2

Syzbot · Published 2023-02-09 · Updated 2026-05-26 · CVE-2023-52737

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 versions prior to 6.2.0-rc3-syzkaller-00376-g7c6984405241

Description The issue is related to a deadlock that can occur when using the btrfs file system. Specifically, it happens when the fiemap code triggers a fault while accessing the user space buffer with fiemap fill next extent(), and there is a concurrent fsync on the file. The deadlock occurs because both fsync and btrfs page mkwrite() take the inode's i mmap lock semaphore. This problem was reported by syzbot and can cause a task to become blocked for an extended period.

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

AZL-55416

BDU:2025-15384

CVE-2023-52737

OPENSUSE-SU-2024_2372-1

OPENSUSE-SU-2024_2394-1

SUSE-SU-2024:2360-1

SUSE-SU-2024:2372-1

SUSE-SU-2024:2381-1

SUSE-SU-2024:2394-1

SUSE-SU-2024:2561-1

SUSE-SU-2024:2939-1

Affected Products

Debian

Linux Kernel

Suse

References · 1337

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52737.json · Exploit
• https://osv.dev/vulnerability/SUSE-SU-2024:2381-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:2939-1 · Vendor Advisory
• https://git.kernel.org/stable/c/d8c594da79bc0244e610a70594e824a401802be1 · Patch
• https://osv.dev/vulnerability/CVE-2023-52737 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-52737 · Vendor Advisory
• https://git.kernel.org/stable/c/519b7e13b5ae8dd38da1e52275705343be6bb508 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-52737 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-11-CVE-2023-52737 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-52737 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-52737 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2024:2372-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:2394-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-52737 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2023-52737 · Vendor Advisory