Detections
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CVE-2020-29568
medium
Description
An issue was discovered in Xen through 4.14.x. Some OSes (such as Linux, FreeBSD, and NetBSD) are processing watch events using a single thread. If the events are received faster than the thread is able to handle, they will get queued. As the queue is unbounded, a guest may be able to trigger an OOM in the backend. All systems with a FreeBSD, Linux, or NetBSD (any version) dom0 are vulnerable.
References
https://xenbits.xenproject.org/xsa/advisory-349.html
https://www.debian.org/security/2021/dsa-4843
https://security.gentoo.org/glsa/202107-30
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html