CVE-2021-46953

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-46953
In the Linux kernel, the following vulnerability has been resolved: ACPI: GTDT: Don't corrupt interrupt mappings on watchdow probe failure When failing the driver probe because of invalid firmware properties, the GTDT driver unmaps the interrupt that it mapped earlier. However, it never checks whether the mapping of the interrupt actially succeeded. Even more, should the firmware report an illegal interrupt number that overlaps with the GIC SGI range, this can result in an IPI being unmapped, and subsequent fireworks (as reported by Dann Frazier). Rework the driver to have a slightly saner behaviour and actually check whether the interrupt has been mapped before unmapping things.

6.7 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 0.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/1ecd5b129252249b9bc03d7645a7bda512747277 Patch
https://git.kernel.org/stable/c/42e69521ee1fa5abf21f478d147d06bbfe6bf6a8 Patch
https://git.kernel.org/stable/c/504632a3577a049dd9bb7aabae5b4476f9c586b4 Patch
https://git.kernel.org/stable/c/596e079c362ac17ed02aa1b99fdc444d62072a01 Patch
https://git.kernel.org/stable/c/7b2162db1498c71962a4bb2f776fa4e76d4d305b Patch
https://git.kernel.org/stable/c/c3385a9122f8db15b453e07bfc88117fce7f3724 Patch
https://git.kernel.org/stable/c/e0f2d86481eaa83df33b0793f75212919db7a19d 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:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

10 Apr 2024, 20:15

Type Values Removed Values Added
First Time Linux linux Kernel
Linux
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 6.7
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CWE NVD-CWE-noinfo
References () https://git.kernel.org/stable/c/1ecd5b129252249b9bc03d7645a7bda512747277 - () https://git.kernel.org/stable/c/1ecd5b129252249b9bc03d7645a7bda512747277 - Patch
References () https://git.kernel.org/stable/c/42e69521ee1fa5abf21f478d147d06bbfe6bf6a8 - () https://git.kernel.org/stable/c/42e69521ee1fa5abf21f478d147d06bbfe6bf6a8 - Patch
References () https://git.kernel.org/stable/c/504632a3577a049dd9bb7aabae5b4476f9c586b4 - () https://git.kernel.org/stable/c/504632a3577a049dd9bb7aabae5b4476f9c586b4 - Patch
References () https://git.kernel.org/stable/c/596e079c362ac17ed02aa1b99fdc444d62072a01 - () https://git.kernel.org/stable/c/596e079c362ac17ed02aa1b99fdc444d62072a01 - Patch
References () https://git.kernel.org/stable/c/7b2162db1498c71962a4bb2f776fa4e76d4d305b - () https://git.kernel.org/stable/c/7b2162db1498c71962a4bb2f776fa4e76d4d305b - Patch
References () https://git.kernel.org/stable/c/c3385a9122f8db15b453e07bfc88117fce7f3724 - () https://git.kernel.org/stable/c/c3385a9122f8db15b453e07bfc88117fce7f3724 - Patch
References () https://git.kernel.org/stable/c/e0f2d86481eaa83df33b0793f75212919db7a19d - () https://git.kernel.org/stable/c/e0f2d86481eaa83df33b0793f75212919db7a19d - Patch
Summary
  • (es) En el kernel de Linux, se resolvió la siguiente vulnerabilidad: ACPI: GTDT: no corrompe las asignaciones de interrupciones en caso de falla de la sonda de vigilancia. Cuando falla la sonda del controlador debido a propiedades de firmware no válidas, el controlador GTDT desasigna la interrupción que asignó anteriormente. Sin embargo, nunca comprueba si el mapeo de la interrupción realmente tuvo éxito. Aún más, si el firmware informa un número de interrupción ilegal que se superpone con el rango GIC SGI, esto puede resultar en que un IPI no se asigne y en posteriores fuegos artificiales (según lo informado por Dann Frazier). Vuelva a trabajar el controlador para que tenga un comportamiento un poco más sensato y verifique si la interrupción se ha asignado antes de desasignar las cosas.

27 Feb 2024, 19:04

Type Values Removed Values Added
New CVE
Information

Published : 2024-02-27 19:04

Updated : 2024-04-10 20:15

NVD link : CVE-2021-46953

Mitre link : CVE-2021-46953

CVE.ORG link : CVE-2021-46953

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo