CVE-2022-50226

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2022-50226
In the Linux kernel, the following vulnerability has been resolved: crypto: ccp - Use kzalloc for sev ioctl interfaces to prevent kernel memory leak For some sev ioctl interfaces, input may be passed that is less than or equal to SEV_FW_BLOB_MAX_SIZE, but larger than the data that PSP firmware returns. In this case, kmalloc will allocate memory that is the size of the input rather than the size of the data. Since PSP firmware doesn't fully overwrite the buffer, the sev ioctl interfaces with the issue may return uninitialized slab memory. Currently, all of the ioctl interfaces in the ccp driver are safe, but to prevent future problems, change all ioctl interfaces that allocate memory with kmalloc to use kzalloc and memset the data buffer to zero in sev_ioctl_do_platform_status.

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/13dc15a3f5fd7f884e4bfa8c011a0ae868df12ae Patch
https://git.kernel.org/stable/c/4c5300f6f5e18b11c02a92f136e69b98fddba15e Patch
https://git.kernel.org/stable/c/caa395aa16e7c9193fd7fa6cde462dd8229d4953 Patch
https://git.kernel.org/stable/c/e11fb0a3a39bb42da35fa662c46ce7391f277436 Patch
https://git.kernel.org/stable/c/f2a920daa780956b987c14b9f23de7c3c8915bf2 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, 12:58

Type Values Removed Values Added
CWE CWE-401
First Time Linux
Linux linux Kernel
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: crypto: ccp - Use kzalloc para interfaces sev ioctl para evitar fugas de memoria en el kernel Para algunas interfaces sev ioctl, se puede pasar una entrada menor o igual a SEV_FW_BLOB_MAX_SIZE, pero mayor que los datos que devuelve el firmware de PSP. En este caso, kmalloc asignará memoria que sea del tamaño de la entrada en lugar del tamaño de los datos. Dado que el firmware de PSP no sobrescribe completamente el búfer, las interfaces sev ioctl con el problema pueden devolver memoria slab sin inicializar. Actualmente, todas las interfaces ioctl en el controlador ccp son seguras, pero para evitar problemas futuros, cambie todas las interfaces ioctl que asignan memoria con kmalloc para usar kzalloc y memset el búfer de datos a cero en sev_ioctl_do_platform_status.
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
References () https://git.kernel.org/stable/c/13dc15a3f5fd7f884e4bfa8c011a0ae868df12ae - () https://git.kernel.org/stable/c/13dc15a3f5fd7f884e4bfa8c011a0ae868df12ae - Patch
References () https://git.kernel.org/stable/c/4c5300f6f5e18b11c02a92f136e69b98fddba15e - () https://git.kernel.org/stable/c/4c5300f6f5e18b11c02a92f136e69b98fddba15e - Patch
References () https://git.kernel.org/stable/c/caa395aa16e7c9193fd7fa6cde462dd8229d4953 - () https://git.kernel.org/stable/c/caa395aa16e7c9193fd7fa6cde462dd8229d4953 - Patch
References () https://git.kernel.org/stable/c/e11fb0a3a39bb42da35fa662c46ce7391f277436 - () https://git.kernel.org/stable/c/e11fb0a3a39bb42da35fa662c46ce7391f277436 - Patch
References () https://git.kernel.org/stable/c/f2a920daa780956b987c14b9f23de7c3c8915bf2 - () https://git.kernel.org/stable/c/f2a920daa780956b987c14b9f23de7c3c8915bf2 - Patch

18 Jun 2025, 11:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-06-18 11:15

Updated : 2025-11-19 12:58

NVD link : CVE-2022-50226

Mitre link : CVE-2022-50226

CVE.ORG link : CVE-2022-50226

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-401

Missing Release of Memory after Effective Lifetime