CVE-2020-29485

MEDIUM

Xen 4.6-4.14.x - DoS

Title source: llm

Description

An issue was discovered in Xen 4.6 through 4.14.x. When acting upon a guest XS_RESET_WATCHES request, not all tracking information is freed. A guest can cause unbounded memory usage in oxenstored. This can lead to a system-wide DoS. Only systems using the Ocaml Xenstored implementation are vulnerable. Systems using the C Xenstored implementation are not vulnerable.

References (4)

[Third Party Advisory] https://www.debian.org/security/2020/dsa-4812

[Patch, Third Party Advisory] https://xenbits.xenproject.org/xsa/advisory-330.txt

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2C6M6S3CIMEBACH6O7V4H2VDANMO6TVA/

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OBLV6L6Q24PPQ2CRFXDX4Q76KU776GKI/

Scores

CVSS v3 5.5

EPSS 0.0006

EPSS Percentile 19.4%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Classification

CWE

CWE-401

Status published

Affected Products (4)

xen/xen < 4.14.0

debian/debian_linux

fedoraproject/fedora

fedoraproject/fedora

Timeline

Published Dec 15, 2020

Tracked Since Feb 18, 2026