Home/CVE/An issue was discovered in Xen through 4.14.x allowing x86 HVM and PVH guest OS users to cause a denial of service (data
CVE

CVE-2020-27671

An issue was discovered in Xen through 4.14.x allowing x86 HVM and PVH guest OS users to cause a denial of service (data

An issue was discovered in Xen through 4.14.x allowing x86 HVM and PVH guest OS users to cause a denial of service (data corruption), cause a data leak, or possibly gain privileges because coalescing of per-page IOMMU TLB flushes is mishandled.

HIGH · CVSS 7.8 EPSS 0.00071
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
▤

Affected Products & Versions

4
xen>= 4.2.0 and <= 4.14.0
opensuse leapall versions
debian linuxall versions
fedoraproject fedoraall versions
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD22 Oct 2020 · 09:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
⚑

Vendor Advisories

17
suse-csafopenSUSE-SU-2024:11520-1
suse-csafSUSE-SU-2020:3742-1
suse-csafSUSE-SU-2020:14557-1
suse-csafopenSUSE-SU-2020:2192-1
suse-csafSUSE-SU-2020:3631-1
🔗

References & Sources

8
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.htmlMailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2021/01/19/8Mailing ListThird Party Advisory
http://xenbits.xen.org/xsa/advisory-346.htmlPatchVendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/
https://security.gentoo.org/glsa/202011-06Third Party Advisory
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