CVE-2020-27675: Race Condition
An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. drivers/xen/events/eventsbase.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.
Affected Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is the severity of CVE-2020-27675?
CVE-2020-27675 has a severe impact due to the potential for a use-after-free or NULL pointer dereference leading to system crashes.
How do I fix CVE-2020-27675?
To remediate CVE-2020-27675, upgrade your Linux kernel to version 5.10.223-1 or later, or applicable patched versions.
Which Linux versions are affected by CVE-2020-27675?
CVE-2020-27675 affects Linux kernels up to version 5.9.1 and certain Fedora and Debian releases.
What kind of issues can CVE-2020-27675 cause?
CVE-2020-27675 can lead to race conditions, causing unexpected behavior like crashes during event-handling in virtualization.
Is CVE-2020-27675 related to virtualization?
Yes, CVE-2020-27675 specifically affects the Linux kernel's handling of event channels in Xen virtualization.