CVE-2020-29568
MEDIUM6.5EPSS 0.23%Published: 12/15/2020Modified: 4/28/2026
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.
Affected packages (3)
- Alpine/linux-ltsfrom 0, < 5.10.4-r0
- Alpine/xenfrom 0, < 0
- Debian/linuxfrom 0, < 5.9.15-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |