CVE-2020-27672

CWE-362 — Race ConditionCWE-416 — Use After Free8 documents7 sources
Severity
7.0HIGH
EPSS
0.0%
top 88.28%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
XEN XENDebian Debian LinuxFedoraproject Fedora+1 more
Timeline
PublishedOct 22
Latest updateMay 24

Description

An issue was discovered in Xen through 4.14.x allowing x86 guest OS users to cause a host OS denial of service, achieve data corruption, or possibly gain privileges by exploiting a race condition that leads to a use-after-free involving 2MiB and 1GiB superpages.

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.0 | Impact: 5.9

Affected Packages3 packages

▶Debianxen< 4.14.0+80-gd101b417b7-1+3
▶NVDxen/xen3.2.0 — 4.14.0
▶NVDopensuse/leap15.1, 15.2+1

Also affects: Debian Linux 10.0, Fedora 31

Patches

Patch: xenbits.xen.org ↗Patch: xenbits.xen.org ↗Patch: xenbits.xen.org ↗

🔴Vulnerability Details

3
GHSA
GHSA-7627-2wxq-jrmh: An issue was discovered in Xen through 4↗2022-05-24
▶
OSV
CVE-2020-27672: An issue was discovered in Xen through 4↗2020-10-22
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CVEList
CVE-2020-27672: An issue was discovered in Xen through 4↗2020-10-22
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📋Vendor Advisories

2
Red Hat
xen: x86: race condition in Xen mapping code (XSA-345)↗2020-10-20
▶
Debian
CVE-2020-27672: xen - An issue was discovered in Xen through 4.14.x allowing x86 guest OS users to cau...↗2020
▶

💬Community

2
Bugzilla
CVE-2020-27672 xen: x86: race condition in Xen mapping code (XSA-345)↗2020-10-23
▶
Bugzilla
CVE-2020-27672 xen: x86: race condition in Xen mapping code (XSA-345) [fedora-all]↗2020-10-23
▶