CVE-2022-49890

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2022-49890
In the Linux kernel, the following vulnerability has been resolved: capabilities: fix potential memleak on error path from vfs_getxattr_alloc() In cap_inode_getsecurity(), we will use vfs_getxattr_alloc() to complete the memory allocation of tmpbuf, if we have completed the memory allocation of tmpbuf, but failed to call handler->get(...), there will be a memleak in below logic: |-- ret = (int)vfs_getxattr_alloc(mnt_userns, ...) | /* ^^^ alloc for tmpbuf */ |-- value = krealloc(*xattr_value, error + 1, flags) | /* ^^^ alloc memory */ |-- error = handler->get(handler, ...) | /* error! */ |-- *xattr_value = value | /* xattr_value is &tmpbuf (memory leak!) */ So we will try to free(tmpbuf) after vfs_getxattr_alloc() fails to fix it. [PM: subject line and backtrace tweaks]

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/0c3e6288da650d1ec911a259c77bc2d88e498603 Patch
https://git.kernel.org/stable/c/2de8eec8afb75792440b8900a01d52b8f6742fd1 Patch
https://git.kernel.org/stable/c/6bb00eb21c0fbf18e5d3538c9ff0cf63fd0ace85 Patch
https://git.kernel.org/stable/c/7480aeff0093d8c54377553ec6b31110bea37b4d Patch
https://git.kernel.org/stable/c/8cf0a1bc12870d148ae830a4ba88cfdf0e879cee Patch
https://git.kernel.org/stable/c/90577bcc01c4188416a47269f8433f70502abe98 Patch
https://git.kernel.org/stable/c/cdf01c807e974048c43c7fd3ca574f6086a57906 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:6.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*
History

07 May 2025, 13:19

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CWE CWE-401
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*
References () https://git.kernel.org/stable/c/0c3e6288da650d1ec911a259c77bc2d88e498603 - () https://git.kernel.org/stable/c/0c3e6288da650d1ec911a259c77bc2d88e498603 - Patch
References () https://git.kernel.org/stable/c/2de8eec8afb75792440b8900a01d52b8f6742fd1 - () https://git.kernel.org/stable/c/2de8eec8afb75792440b8900a01d52b8f6742fd1 - Patch
References () https://git.kernel.org/stable/c/6bb00eb21c0fbf18e5d3538c9ff0cf63fd0ace85 - () https://git.kernel.org/stable/c/6bb00eb21c0fbf18e5d3538c9ff0cf63fd0ace85 - Patch
References () https://git.kernel.org/stable/c/7480aeff0093d8c54377553ec6b31110bea37b4d - () https://git.kernel.org/stable/c/7480aeff0093d8c54377553ec6b31110bea37b4d - Patch
References () https://git.kernel.org/stable/c/8cf0a1bc12870d148ae830a4ba88cfdf0e879cee - () https://git.kernel.org/stable/c/8cf0a1bc12870d148ae830a4ba88cfdf0e879cee - Patch
References () https://git.kernel.org/stable/c/90577bcc01c4188416a47269f8433f70502abe98 - () https://git.kernel.org/stable/c/90577bcc01c4188416a47269f8433f70502abe98 - Patch
References () https://git.kernel.org/stable/c/cdf01c807e974048c43c7fd3ca574f6086a57906 - () https://git.kernel.org/stable/c/cdf01c807e974048c43c7fd3ca574f6086a57906 - Patch
First Time Linux linux Kernel
Linux

02 May 2025, 13:52

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: capacidades: reparar posible fuga de memoria en la ruta de error de vfs_getxattr_alloc() En cap_inode_getsecurity(), utilizaremos vfs_getxattr_alloc() para completar la asignación de memoria de tmpbuf, si hemos completado la asignación de memoria de tmpbuf, pero no pudimos llamar a handler->get(...), habrá una fuga de memoria en la siguiente lógica: |-- ret = (int)vfs_getxattr_alloc(mnt_userns, ...) | /* ^^^ asignar para tmpbuf */ |-- valor = krealloc(*xattr_value, error + 1, flags) | /* ^^^ asignar memoria */ |-- error = handler->get(handler, ...) | /* ¡error! */ |-- *xattr_value = valor | /* xattr_value es &tmpbuf (¡pérdida de memoria!) */ Intentaremos liberar (tmpbuf) después de que vfs_getxattr_alloc() no pueda solucionarlo. [MP: línea de asunto y ajustes de backtrace]

01 May 2025, 15:16

Type Values Removed Values Added
New CVE
Information

Published : 2025-05-01 15:16

Updated : 2025-05-07 13:19

NVD link : CVE-2022-49890

Mitre link : CVE-2022-49890

CVE.ORG link : CVE-2022-49890

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-401

Missing Release of Memory after Effective Lifetime