CVE-2022-50212

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2022-50212
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: do not allow CHAIN_ID to refer to another table When doing lookups for chains on the same batch by using its ID, a chain from a different table can be used. If a rule is added to a table but refers to a chain in a different table, it will be linked to the chain in table2, but would have expressions referring to objects in table1. Then, when table1 is removed, the rule will not be removed as its linked to a chain in table2. When expressions in the rule are processed or removed, that will lead to a use-after-free. When looking for chains by ID, use the table that was used for the lookup by name, and only return chains belonging to that same table.

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/0f49613a213d918af790c1276f79da741968de11 Patch
https://git.kernel.org/stable/c/58e863f64ee3d0879297e5e53b646e4b91e59620 Patch
https://git.kernel.org/stable/c/91501513016903077f91033fa5d2aa26cac399b2 Patch
https://git.kernel.org/stable/c/95f466d22364a33d183509629d0879885b4f547e Patch
https://git.kernel.org/stable/c/9e7dcb88ec8e85e4a8ad0ea494ea2f90f32d2583 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

19 Nov 2025, 13:00

Type Values Removed Values Added
First Time Linux
Linux linux Kernel
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: nf_tables: no permitir que CHAIN_ID haga referencia a otra tabla Al realizar búsquedas de cadenas en el mismo lote usando su ID, se puede usar una cadena de una tabla diferente. Si se agrega una regla a una tabla pero hace referencia a una cadena en una tabla diferente, se vinculará a la cadena en la tabla2, pero tendría expresiones que hacen referencia a objetos en la tabla1. Luego, cuando se elimina la tabla1, la regla no se eliminará ya que está vinculada a una cadena en la tabla2. Cuando se procesan o eliminan expresiones en la regla, eso conducirá a un Use-After-Free. Al buscar cadenas por ID, use la tabla que se usó para la búsqueda por nombre y solo devuelva las cadenas que pertenecen a esa misma tabla.
References () https://git.kernel.org/stable/c/0f49613a213d918af790c1276f79da741968de11 - () https://git.kernel.org/stable/c/0f49613a213d918af790c1276f79da741968de11 - Patch
References () https://git.kernel.org/stable/c/58e863f64ee3d0879297e5e53b646e4b91e59620 - () https://git.kernel.org/stable/c/58e863f64ee3d0879297e5e53b646e4b91e59620 - Patch
References () https://git.kernel.org/stable/c/91501513016903077f91033fa5d2aa26cac399b2 - () https://git.kernel.org/stable/c/91501513016903077f91033fa5d2aa26cac399b2 - Patch
References () https://git.kernel.org/stable/c/95f466d22364a33d183509629d0879885b4f547e - () https://git.kernel.org/stable/c/95f466d22364a33d183509629d0879885b4f547e - Patch
References () https://git.kernel.org/stable/c/9e7dcb88ec8e85e4a8ad0ea494ea2f90f32d2583 - () https://git.kernel.org/stable/c/9e7dcb88ec8e85e4a8ad0ea494ea2f90f32d2583 - Patch
CWE CWE-416

18 Jun 2025, 11:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-06-18 11:15

Updated : 2025-11-19 13:00

NVD link : CVE-2022-50212

Mitre link : CVE-2022-50212

CVE.ORG link : CVE-2022-50212

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-416

Use After Free