CVE-2020-27675

MediumCVSS 4.7/10Last modified Jun 17, 2026

Description

An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. drivers/xen/events/events_base.c allows event-channel removal during the event-handling loop (a race condition). This can cause a use-after-free or NULL pointer dereference, as demonstrated by a dom0 crash via events for an in-reconfiguration paravirtualized device, aka CID-073d0552ead5.

Metrics

CVSS 3.1 4.7/10CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-362 CWE-416 CWE-476

Affected software

No affected versions have been published.

Timeline

Published: Oct 22, 2020
Last modified: Jun 17, 2026
NVD status: Modified

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