CVE-2021-47201

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-47201
In the Linux kernel, the following vulnerability has been resolved: iavf: free q_vectors before queues in iavf_disable_vf iavf_free_queues() clears adapter->num_active_queues, which iavf_free_q_vectors() relies on, so swap the order of these two function calls in iavf_disable_vf(). This resolves a panic encountered when the interface is disabled and then later brought up again after PF communication is restored.

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/78638b47132244e3934dc5dc79f6372d5ce8e98c Patch
https://git.kernel.org/stable/c/89f22f129696ab53cfbc608e0a2184d0fea46ac1 Patch
https://git.kernel.org/stable/c/926e8c83d4c1c2dac0026637eb0d492df876489e Patch
https://git.kernel.org/stable/c/9ef6589cac9a8c47f5544ccdf4c498093733bb3f Patch
https://git.kernel.org/stable/c/78638b47132244e3934dc5dc79f6372d5ce8e98c Patch
https://git.kernel.org/stable/c/89f22f129696ab53cfbc608e0a2184d0fea46ac1 Patch
https://git.kernel.org/stable/c/926e8c83d4c1c2dac0026637eb0d492df876489e Patch
https://git.kernel.org/stable/c/9ef6589cac9a8c47f5544ccdf4c498093733bb3f 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:*:*:*:*:*:*
History

27 Mar 2025, 21:15

Type Values Removed Values Added
CWE NVD-CWE-noinfo
First Time Linux
Linux linux Kernel
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*
References () https://git.kernel.org/stable/c/78638b47132244e3934dc5dc79f6372d5ce8e98c - () https://git.kernel.org/stable/c/78638b47132244e3934dc5dc79f6372d5ce8e98c - Patch
References () https://git.kernel.org/stable/c/89f22f129696ab53cfbc608e0a2184d0fea46ac1 - () https://git.kernel.org/stable/c/89f22f129696ab53cfbc608e0a2184d0fea46ac1 - Patch
References () https://git.kernel.org/stable/c/926e8c83d4c1c2dac0026637eb0d492df876489e - () https://git.kernel.org/stable/c/926e8c83d4c1c2dac0026637eb0d492df876489e - Patch
References () https://git.kernel.org/stable/c/9ef6589cac9a8c47f5544ccdf4c498093733bb3f - () https://git.kernel.org/stable/c/9ef6589cac9a8c47f5544ccdf4c498093733bb3f - Patch

21 Nov 2024, 06:35

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/78638b47132244e3934dc5dc79f6372d5ce8e98c - () https://git.kernel.org/stable/c/78638b47132244e3934dc5dc79f6372d5ce8e98c -
References () https://git.kernel.org/stable/c/89f22f129696ab53cfbc608e0a2184d0fea46ac1 - () https://git.kernel.org/stable/c/89f22f129696ab53cfbc608e0a2184d0fea46ac1 -
References () https://git.kernel.org/stable/c/926e8c83d4c1c2dac0026637eb0d492df876489e - () https://git.kernel.org/stable/c/926e8c83d4c1c2dac0026637eb0d492df876489e -
References () https://git.kernel.org/stable/c/9ef6589cac9a8c47f5544ccdf4c498093733bb3f - () https://git.kernel.org/stable/c/9ef6589cac9a8c47f5544ccdf4c498093733bb3f -
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iavf: libera q_vectors antes de las colas en iavf_disable_vf iavf_free_queues() borra adaptador->num_active_queues, del que depende iavf_free_q_vectors(), por lo que se debe intercambiar el orden de estas dos llamadas de función en iavf_disable_vf(). Esto resuelve un pánico que se produce cuando se deshabilita la interfaz y luego se vuelve a activar después de que se restablece la comunicación PF.

10 Apr 2024, 19:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-04-10 19:15

Updated : 2025-03-27 21:15

NVD link : CVE-2021-47201

Mitre link : CVE-2021-47201

CVE.ORG link : CVE-2021-47201

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo