CVE-2021-47095

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-47095
In the Linux kernel, the following vulnerability has been resolved: ipmi: ssif: initialize ssif_info->client early During probe ssif_info->client is dereferenced in error path. However, it is set when some of the error checking has already been done. This causes following kernel crash if an error path is taken: [ 30.645593][ T674] ipmi_ssif 0-000e: ipmi_ssif: Not probing, Interface already present [ 30.657616][ T674] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000088 ... [ 30.657723][ T674] pc : __dev_printk+0x28/0xa0 [ 30.657732][ T674] lr : _dev_err+0x7c/0xa0 ... [ 30.657772][ T674] Call trace: [ 30.657775][ T674] __dev_printk+0x28/0xa0 [ 30.657778][ T674] _dev_err+0x7c/0xa0 [ 30.657781][ T674] ssif_probe+0x548/0x900 [ipmi_ssif 62ce4b08badc1458fd896206d9ef69a3c31f3d3e] [ 30.657791][ T674] i2c_device_probe+0x37c/0x3c0 ... Initialize ssif_info->client before any error path can be taken. Clear i2c_client data in the error path to prevent the dangling pointer from leaking.

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/1f6ab847461ce7dd89ae9db2dd4658c993355d7c Patch
https://git.kernel.org/stable/c/34f35f8f14bc406efc06ee4ff73202c6fd245d15 Patch
https://git.kernel.org/stable/c/77a7311ca167aa5b7055c549a940a56e73ee5f29 Patch
https://git.kernel.org/stable/c/8efd6a3391f7b0b19fb0c38e50add06ca30c94af Patch
https://git.kernel.org/stable/c/1f6ab847461ce7dd89ae9db2dd4658c993355d7c Patch
https://git.kernel.org/stable/c/34f35f8f14bc406efc06ee4ff73202c6fd245d15 Patch
https://git.kernel.org/stable/c/77a7311ca167aa5b7055c549a940a56e73ee5f29 Patch
https://git.kernel.org/stable/c/8efd6a3391f7b0b19fb0c38e50add06ca30c94af 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:5.16:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc6:*:*:*:*:*:*
History

07 Jan 2025, 20:15

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:5.16:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CWE CWE-476
First Time Linux
Linux linux Kernel
References () https://git.kernel.org/stable/c/1f6ab847461ce7dd89ae9db2dd4658c993355d7c - () https://git.kernel.org/stable/c/1f6ab847461ce7dd89ae9db2dd4658c993355d7c - Patch
References () https://git.kernel.org/stable/c/34f35f8f14bc406efc06ee4ff73202c6fd245d15 - () https://git.kernel.org/stable/c/34f35f8f14bc406efc06ee4ff73202c6fd245d15 - Patch
References () https://git.kernel.org/stable/c/77a7311ca167aa5b7055c549a940a56e73ee5f29 - () https://git.kernel.org/stable/c/77a7311ca167aa5b7055c549a940a56e73ee5f29 - Patch
References () https://git.kernel.org/stable/c/8efd6a3391f7b0b19fb0c38e50add06ca30c94af - () https://git.kernel.org/stable/c/8efd6a3391f7b0b19fb0c38e50add06ca30c94af - Patch

21 Nov 2024, 06:35

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/1f6ab847461ce7dd89ae9db2dd4658c993355d7c - () https://git.kernel.org/stable/c/1f6ab847461ce7dd89ae9db2dd4658c993355d7c -
References () https://git.kernel.org/stable/c/34f35f8f14bc406efc06ee4ff73202c6fd245d15 - () https://git.kernel.org/stable/c/34f35f8f14bc406efc06ee4ff73202c6fd245d15 -
References () https://git.kernel.org/stable/c/77a7311ca167aa5b7055c549a940a56e73ee5f29 - () https://git.kernel.org/stable/c/77a7311ca167aa5b7055c549a940a56e73ee5f29 -
References () https://git.kernel.org/stable/c/8efd6a3391f7b0b19fb0c38e50add06ca30c94af - () https://git.kernel.org/stable/c/8efd6a3391f7b0b19fb0c38e50add06ca30c94af -

05 Mar 2024, 13:41

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se resolvió la siguiente vulnerabilidad: ipmi: ssif: inicializa ssif_info->client temprano Durante la sonda, ssif_info->client se desreferencia en la ruta de error. Sin embargo, se establece cuando ya se ha realizado parte de la verificación de errores. Esto provoca el siguiente fallo del kernel si se toma una ruta de error: [30.645593][ T674] ipmi_ssif 0-000e: ipmi_ssif: No sondeando, la interfaz ya está presente [30.657616][ T674] No se puede manejar la desreferencia del puntero NULL del kernel en la dirección virtual 0000000000000088. [ 30.657723][ T674] pc : __dev_printk+0x28/0xa0 [ 30.657732][ T674] lr : _dev_err+0x7c/0xa0 ... [ 30.657772][ T674] Rastreo de llamadas: [ 30.657775][ T674] __dev_printk+0x28/0 xa0 [ 30.657778][ T674] _dev_err+0x7c/0xa0 [ 30.657781][ T674] ssif_probe+0x548/0x900 [ipmi_ssif 62ce4b08badc1458fd896206d9ef69a3c31f3d3e] [ 30.65779 1][T674] i2c_device_probe+0x37c/0x3c0... Inicialice ssif_info->client antes de que pueda aparecer cualquier ruta de error. ser tomado. Borre los datos de i2c_client en la ruta del error para evitar que se filtre el puntero colgante.

04 Mar 2024, 18:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-03-04 18:15

Updated : 2025-01-07 20:15

NVD link : CVE-2021-47095

Mitre link : CVE-2021-47095

CVE.ORG link : CVE-2021-47095

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference