CVE-2021-28691

HIGH Year: 2021
CVSS v3 Score
7.8
High
CVSS v2 Score
4.6
Medium
Weakness Type
CWE-416
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Vulnerability Description

Guest triggered use-after-free in Linux xen-netback A malicious or buggy network PV frontend can force Linux netback to disable the interface and terminate the receive kernel thread associated with queue 0 in response to the frontend sending a malformed packet. Such kernel thread termination will lead to a use-after-free in Linux netback when the backend is destroyed, as the kernel thread associated with queue 0 will have already exited and thus the call to kthread_stop will be performed against a stale pointer.

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