CVE-2022-48933

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: fix memory leak during stateful obj update stateful objects can be updated from the control plane. The transaction logic allocates a temporary object for this purpose. The ->init function was called for this object, so plain kfree() leaks resources. We must call ->destroy function of the object. nft_obj_destroy does this, but it also decrements the module refcount, but the update path doesn't increment it. To avoid special-casing the update object release, do module_get for the update case too and release it via nft_obj_destroy().

CVSS v3 5.5 MEDIUM

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/34bb90e407e3288f610558beaae54ecaa32b11c4	Patch
https://git.kernel.org/stable/c/53026346a94c43f35c32b18804041bc483271d87	Patch
https://git.kernel.org/stable/c/7e9880e81d3fd6a43c202f205717485290432826	Patch
https://git.kernel.org/stable/c/dad3bdeef45f81a6e90204bcc85360bb76eccec7	Patch
https://git.kernel.org/stable/c/e96e204ee6fa46702f6c94c3c69a09e69e0eac52	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

23 Aug 2024, 01:50

Type	Values Removed	Values Added
CPE		cpe:2.3:o:linux:linux_kernel::::::::
First Time		Linux Linux linux Kernel
References	~~() https://git.kernel.org/stable/c/34bb90e407e3288f610558beaae54ecaa32b11c4 -~~	() https://git.kernel.org/stable/c/34bb90e407e3288f610558beaae54ecaa32b11c4 - Patch
References	~~() https://git.kernel.org/stable/c/53026346a94c43f35c32b18804041bc483271d87 -~~	() https://git.kernel.org/stable/c/53026346a94c43f35c32b18804041bc483271d87 - Patch
References	~~() https://git.kernel.org/stable/c/7e9880e81d3fd6a43c202f205717485290432826 -~~	() https://git.kernel.org/stable/c/7e9880e81d3fd6a43c202f205717485290432826 - Patch
References	~~() https://git.kernel.org/stable/c/dad3bdeef45f81a6e90204bcc85360bb76eccec7 -~~	() https://git.kernel.org/stable/c/dad3bdeef45f81a6e90204bcc85360bb76eccec7 - Patch
References	~~() https://git.kernel.org/stable/c/e96e204ee6fa46702f6c94c3c69a09e69e0eac52 -~~	() https://git.kernel.org/stable/c/e96e204ee6fa46702f6c94c3c69a09e69e0eac52 - Patch
CWE		CWE-401
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.5

22 Aug 2024, 12:48

Type	Values Removed	Values Added
Summary		(es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: nf_tables: corrige la pérdida de memoria durante la actualización de objetos con estado. Los objetos con estado se pueden actualizar desde el plano de control. La lógica de transacción asigna un objeto temporal para este propósito. La función ->init fue llamada para este objeto, por lo que kfree() simple pierde recursos. Debemos llamar a la función ->destruir del objeto. nft_obj_destroy hace esto, pero también disminuye el recuento del módulo, pero la ruta de actualización no lo incrementa. Para evitar usar mayúsculas y minúsculas especiales en la versión del objeto de actualización, utilice module_get para el caso de actualización también y libérela mediante nft_obj_destroy().

22 Aug 2024, 04:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2024-08-22 04:15

Updated : 2024-08-23 01:50

NVD link : CVE-2022-48933

Mitre link : CVE-2022-48933

CVE.ORG link : CVE-2022-48933

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-401

Missing Release of Memory after Effective Lifetime

5.5 /10