CVE-2020-29568
MEDIUMXen < 4.14.1 - Denial of Service via Unbounded Watch Event Queue
Title source: llmDescription
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 (5)
Core 5
Core References
Patch, Vendor Advisory x_refsource_misc
https://xenbits.xenproject.org/xsa/advisory-349.html
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2021/dsa-4843
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
Third Party Advisory vendor-advisory
x_refsource_gentoo
https://security.gentoo.org/glsa/202107-30
Scores
CVSS v3
6.5
EPSS
0.0023
EPSS Percentile
45.3%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Details
CWE
CWE-770
Status
published
Products (3)
debian/debian_linux
9.0
debian/debian_linux
10.0
xen/xen
< 4.14.1
Published
Dec 15, 2020
Tracked Since
Feb 18, 2026