CVE-2022-48732

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2022-48732
In the Linux kernel, the following vulnerability has been resolved: drm/nouveau: fix off by one in BIOS boundary checking Bounds checking when parsing init scripts embedded in the BIOS reject access to the last byte. This causes driver initialization to fail on Apple eMac's with GeForce 2 MX GPUs, leaving the system with no working console. This is probably only seen on OpenFirmware machines like PowerPC Macs because the BIOS image provided by OF is only the used parts of the ROM, not a power-of-two blocks read from PCI directly so PCs always have empty bytes at the end that are never accessed.

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/1b777d4d9e383d2744fc9b3a09af6ec1893c8b1a Patch
https://git.kernel.org/stable/c/909d3ec1bf9f0ec534bfc081b77c0836fea7b0e2 Patch
https://git.kernel.org/stable/c/acc887ba88333f5fec49631f12d8cc7ebd95781c Patch
https://git.kernel.org/stable/c/b2a21669ee98aafc41c6d42ef15af4dab9e6e882 Patch
https://git.kernel.org/stable/c/d4b746e60fd8eaa8016e144223abe91158edcdad Patch
https://git.kernel.org/stable/c/d877e814a62b7de9069aeff8bc1d979dfc996e06 Patch
https://git.kernel.org/stable/c/e7c36fa8a1e63b08312162179c78a0c7795ea369 Patch
https://git.kernel.org/stable/c/f071d9fa857582d7bd77f4906691f73d3edeab73 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:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

19 Aug 2024, 17:58

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8
References () https://git.kernel.org/stable/c/1b777d4d9e383d2744fc9b3a09af6ec1893c8b1a - () https://git.kernel.org/stable/c/1b777d4d9e383d2744fc9b3a09af6ec1893c8b1a - Patch
References () https://git.kernel.org/stable/c/909d3ec1bf9f0ec534bfc081b77c0836fea7b0e2 - () https://git.kernel.org/stable/c/909d3ec1bf9f0ec534bfc081b77c0836fea7b0e2 - Patch
References () https://git.kernel.org/stable/c/acc887ba88333f5fec49631f12d8cc7ebd95781c - () https://git.kernel.org/stable/c/acc887ba88333f5fec49631f12d8cc7ebd95781c - Patch
References () https://git.kernel.org/stable/c/b2a21669ee98aafc41c6d42ef15af4dab9e6e882 - () https://git.kernel.org/stable/c/b2a21669ee98aafc41c6d42ef15af4dab9e6e882 - Patch
References () https://git.kernel.org/stable/c/d4b746e60fd8eaa8016e144223abe91158edcdad - () https://git.kernel.org/stable/c/d4b746e60fd8eaa8016e144223abe91158edcdad - Patch
References () https://git.kernel.org/stable/c/d877e814a62b7de9069aeff8bc1d979dfc996e06 - () https://git.kernel.org/stable/c/d877e814a62b7de9069aeff8bc1d979dfc996e06 - Patch
References () https://git.kernel.org/stable/c/e7c36fa8a1e63b08312162179c78a0c7795ea369 - () https://git.kernel.org/stable/c/e7c36fa8a1e63b08312162179c78a0c7795ea369 - Patch
References () https://git.kernel.org/stable/c/f071d9fa857582d7bd77f4906691f73d3edeab73 - () https://git.kernel.org/stable/c/f071d9fa857582d7bd77f4906691f73d3edeab73 - Patch
CWE CWE-193
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: drm/nouveau: solucionado por uno en la comprobación de los límites del BIOS. La comprobación de los límites al analizar los scripts de inicio integrados en el BIOS rechaza el acceso al último byte. Esto hace que la inicialización del controlador falle en Apple eMac con GPU GeForce 2 MX, dejando el sistema sin consola funcional. Probablemente esto solo se vea en máquinas OpenFirmware como PowerPC Mac porque la imagen del BIOS proporcionada por OF es solo las partes utilizadas de la ROM, no una potencia de dos bloques leída directamente desde PCI, por lo que las PC siempre tienen bytes vacíos al final que son nunca accedido.

20 Jun 2024, 12:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-06-20 12:15

Updated : 2024-08-19 17:58

NVD link : CVE-2022-48732

Mitre link : CVE-2022-48732

CVE.ORG link : CVE-2022-48732

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-193

Off-by-one Error