CVE-2021-47201

HIGH

Linux Kernel - Use-After-Free in iavf_disable_vf

Title source: llm
STIX 2.1

Description

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.

Scores

CVSS v3 7.8
EPSS 0.0024
EPSS Percentile 15.7%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

Status published
Products (12)
Linux/Linux < 4.13
Linux/Linux 4.13
Linux/Linux 5.10.82 - 5.10.*
Linux/Linux 5.15.5 - 5.15.*
Linux/Linux 5.16
Linux/Linux 5.4.162 - 5.4.*
Linux/Linux 65c7006f234c9ede887d468f595f259a5c5cc552 - 78638b47132244e3934dc5dc79f6372d5ce8e98c
Linux/Linux 65c7006f234c9ede887d468f595f259a5c5cc552 - 89f22f129696ab53cfbc608e0a2184d0fea46ac1
Linux/Linux 65c7006f234c9ede887d468f595f259a5c5cc552 - 926e8c83d4c1c2dac0026637eb0d492df876489e
Linux/Linux 65c7006f234c9ede887d468f595f259a5c5cc552 - 9ef6589cac9a8c47f5544ccdf4c498093733bb3f
... and 2 more
Published Apr 10, 2024
Tracked Since Feb 18, 2026