CVE-2022-49549

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2022-49549
In the Linux kernel, the following vulnerability has been resolved: x86/MCE/AMD: Fix memory leak when threshold_create_bank() fails In mce_threshold_create_device(), if threshold_create_bank() fails, the previously allocated threshold banks array @bp will be leaked because the call to mce_threshold_remove_device() will not free it. This happens because mce_threshold_remove_device() fetches the pointer through the threshold_banks per-CPU variable but bp is written there only after the bank creation is successful, and not before, when threshold_create_bank() fails. Add a helper which unwinds all the bank creation work previously done and pass into it the previously allocated threshold banks array for freeing. [ bp: Massage. ]

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/396b8e7ab2a99ddac57d3522b3da5e58cb608d37 Patch
https://git.kernel.org/stable/c/9708f1956eeb70c86943e0bc62fa3b0101b59616 Patch
https://git.kernel.org/stable/c/b4acb8e7f1594607bc9017ef0aacb40b24a003d6 Patch
https://git.kernel.org/stable/c/cc0dd4456f9573bf8af9b4d8754433918e809e1e Patch
https://git.kernel.org/stable/c/e5f28623ceb103e13fc3d7bd45edf9818b227fd0 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:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

10 Mar 2025, 21:22

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/396b8e7ab2a99ddac57d3522b3da5e58cb608d37 - () https://git.kernel.org/stable/c/396b8e7ab2a99ddac57d3522b3da5e58cb608d37 - Patch
References () https://git.kernel.org/stable/c/9708f1956eeb70c86943e0bc62fa3b0101b59616 - () https://git.kernel.org/stable/c/9708f1956eeb70c86943e0bc62fa3b0101b59616 - Patch
References () https://git.kernel.org/stable/c/b4acb8e7f1594607bc9017ef0aacb40b24a003d6 - () https://git.kernel.org/stable/c/b4acb8e7f1594607bc9017ef0aacb40b24a003d6 - Patch
References () https://git.kernel.org/stable/c/cc0dd4456f9573bf8af9b4d8754433918e809e1e - () https://git.kernel.org/stable/c/cc0dd4456f9573bf8af9b4d8754433918e809e1e - Patch
References () https://git.kernel.org/stable/c/e5f28623ceb103e13fc3d7bd45edf9818b227fd0 - () https://git.kernel.org/stable/c/e5f28623ceb103e13fc3d7bd45edf9818b227fd0 - Patch
First Time Linux
Linux linux Kernel
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: x86/MCE/AMD: Se corrige la pérdida de memoria cuando falla el umbral_create_bank() En mce_threshold_create_device(), si falla el umbral_create_bank(), la matriz de bancos de umbral previamente asignada @bp se filtrará porque la llamada a mce_threshold_remove_device() no la liberará. Esto sucede porque mce_threshold_remove_device() obtiene el puntero a través de la variable por CPU del umbral_banks, pero bp se escribe allí solo después de que la creación del banco sea exitosa, y no antes, cuando falla el umbral_create_bank(). Agregue un asistente que desenrolle todo el trabajo de creación de bancos previamente realizado y le pase la matriz de bancos de umbral previamente asignada para liberar. [ bp: Masaje. ]
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CWE CWE-401

26 Feb 2025, 07:01

Type Values Removed Values Added
New CVE
Information

Published : 2025-02-26 07:01

Updated : 2025-03-10 21:22

NVD link : CVE-2022-49549

Mitre link : CVE-2022-49549

CVE.ORG link : CVE-2022-49549

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-401

Missing Release of Memory after Effective Lifetime