Medium severity · published Oct 22, 2020
CVE-2020-27673
An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x
5.5
CVSS
0.4%
EPSS
No
On KEV
Description
An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. Guest OS users can cause a denial of service (host OS hang) via a high rate of events to dom0, aka CID-e99502f76271.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
2.6.12 before 4.4.244; 4.5.0 before 4.9.244; 4.10.0 before 4.14.207; 4.15.0 before 4.19.155; 4.20.0 before 5.4.75; 5.5.0 before 5.9.5; +1 more · source: NVD
DL
Debian Linux · Debian
9.0 · source: NVD
LE
Leap · Opensuse
15.1; 15.2 · source: NVD
XE
Xen · Xen
through 4.14.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-27673
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-27673
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/2021/01/19/6
Patch
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e99502f76271d6bc4e374fe368c50c67a1fd3070
Patch
https://github.com/torvalds/linux/commit/e99502f76271d6bc4e374fe368c50c67a1fd3070
Mailing List
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
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