CVE-2020-27675
low-risk
Published 2020-10-22
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.
Do I need to act?
-
0.06% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.7/10
Medium
LOCAL
/ HIGH complexity
Affected Products (5)
Affected Vendors
References (20)
Third Party Advisory
https://security.gentoo.org/glsa/202011-06
Third Party Advisory
https://security.gentoo.org/glsa/202011-06
24
/ 100
low-risk
Severity
12/34 · Low
Exploitability
0/34 · Minimal
Exposure
12/34 · Low