CVE-2023-52668

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2023-52668
In the Linux kernel, the following vulnerability has been resolved: btrfs: zoned: fix lock ordering in btrfs_zone_activate() The btrfs CI reported a lockdep warning as follows by running generic generic/129. WARNING: possible circular locking dependency detected 6.7.0-rc5+ #1 Not tainted ------------------------------------------------------ kworker/u5:5/793427 is trying to acquire lock: ffff88813256d028 (&cache->lock){+.+.}-{2:2}, at: btrfs_zone_finish_one_bg+0x5e/0x130 but task is already holding lock: ffff88810a23a318 (&fs_info->zone_active_bgs_lock){+.+.}-{2:2}, at: btrfs_zone_finish_one_bg+0x34/0x130 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&fs_info->zone_active_bgs_lock){+.+.}-{2:2}: ... -> #0 (&cache->lock){+.+.}-{2:2}: ... This is because we take fs_info->zone_active_bgs_lock after a block_group's lock in btrfs_zone_activate() while doing the opposite in other places. Fix the issue by expanding the fs_info->zone_active_bgs_lock's critical section and taking it before a block_group's lock.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/1908e9d01e5395adff68d9d308a0fb15337e6272 Patch
https://git.kernel.org/stable/c/6f74989f5909cdec9b1274641f0fa306b15bb476 Patch
https://git.kernel.org/stable/c/b18f3b60b35a8c01c9a2a0f0d6424c6d73971dc3 Patch
https://git.kernel.org/stable/c/1908e9d01e5395adff68d9d308a0fb15337e6272 Patch
https://git.kernel.org/stable/c/6f74989f5909cdec9b1274641f0fa306b15bb476 Patch
https://git.kernel.org/stable/c/b18f3b60b35a8c01c9a2a0f0d6424c6d73971dc3 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*
History

19 Sep 2025, 14:26

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*
First Time Linux
Linux linux Kernel
CWE CWE-667
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
References () https://git.kernel.org/stable/c/1908e9d01e5395adff68d9d308a0fb15337e6272 - () https://git.kernel.org/stable/c/1908e9d01e5395adff68d9d308a0fb15337e6272 - Patch
References () https://git.kernel.org/stable/c/6f74989f5909cdec9b1274641f0fa306b15bb476 - () https://git.kernel.org/stable/c/6f74989f5909cdec9b1274641f0fa306b15bb476 - Patch
References () https://git.kernel.org/stable/c/b18f3b60b35a8c01c9a2a0f0d6424c6d73971dc3 - () https://git.kernel.org/stable/c/b18f3b60b35a8c01c9a2a0f0d6424c6d73971dc3 - Patch

21 Nov 2024, 08:40

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se resolvió la siguiente vulnerabilidad: btrfs:zoned: corrige el orden de bloqueo en btrfs_zone_activate() El CI de btrfs informó una advertencia de bloqueo de la siguiente manera al ejecutar generic generic/129. ADVERTENCIA: se detectó posible dependencia de bloqueo circular 6.7.0-rc5+ #1 No contaminado ---------------------------------- -------------------- kworker/u5:5/793427 está intentando adquirir el bloqueo: ffff88813256d028 (&cache->lock){+.+.}-{2: 2}, en: btrfs_zone_finish_one_bg+0x5e/0x130 pero la tarea ya mantiene el bloqueo: ffff88810a23a318 (&fs_info->zone_active_bgs_lock){+.+.}-{2:2}, en: btrfs_zone_finish_one_bg+0x34/0x130 cuyo bloqueo ya depende del cerradura nueva. la cadena de dependencia existente (en orden inverso) es: -> #1 (&fs_info->zone_active_bgs_lock){+.+.}-{2:2}: ... -> #0 (&cache->lock){+. +.}-{2:2}: ... Esto se debe a que tomamos fs_info->zone_active_bgs_lock después del bloqueo de un block_group en btrfs_zone_activate() mientras hacemos lo contrario en otros lugares. Solucione el problema expandiendo la sección crítica de fs_info->zone_active_bgs_lock y llevándola antes del bloqueo de block_group.
References () https://git.kernel.org/stable/c/1908e9d01e5395adff68d9d308a0fb15337e6272 - () https://git.kernel.org/stable/c/1908e9d01e5395adff68d9d308a0fb15337e6272 -
References () https://git.kernel.org/stable/c/6f74989f5909cdec9b1274641f0fa306b15bb476 - () https://git.kernel.org/stable/c/6f74989f5909cdec9b1274641f0fa306b15bb476 -
References () https://git.kernel.org/stable/c/b18f3b60b35a8c01c9a2a0f0d6424c6d73971dc3 - () https://git.kernel.org/stable/c/b18f3b60b35a8c01c9a2a0f0d6424c6d73971dc3 -

17 May 2024, 14:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-05-17 14:15

Updated : 2025-09-19 14:26

NVD link : CVE-2023-52668

Mitre link : CVE-2023-52668

CVE.ORG link : CVE-2023-52668

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-667

Improper Locking