High severity · published Oct 22, 2020
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 corruption), cause a data leak, or possibly gain…
7.8
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
10.0 · source: NVD
FE
Fedora · Fedoraproject
31 · source: NVD
LE
Leap · Opensuse
15.1; 15.2 · source: NVD
XE
Xen · Xen
4.2.0 through 4.14.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-27671
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-27671
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.html
Mailing List
http://www.openwall.com/lists/oss-security/2021/01/19/8
Patch
http://xenbits.xen.org/xsa/advisory-346.html
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/
Third Party Advisory
https://security.gentoo.org/glsa/202011-06
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