Home/CVE/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 d
CVE

CVE-2020-27673

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 d

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.

MEDIUM · CVSS 5.5 EPSS 0.00035
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  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
▤

Affected Products & Versions

10
linux kernel>= 2.6.12 and < 4.4.244
linux kernel>= 4.5.0 and < 4.9.244
linux kernel>= 4.10.0 and < 4.14.207
linux kernel>= 4.15.0 and < 4.19.155
linux kernel>= 4.20.0 and < 5.4.75
linux kernel>= 5.5.0 and < 5.9.5
linux kernelall versions
debian linuxall versions
▣

Scoring & Timeline

5.5
MEDIUM · 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:L/PR:L/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

23
suse-csafopenSUSE-SU-2021:1975-1
suse-csafopenSUSE-SU-2021:1977-1
suse-csafSUSE-SU-2021:1975-1
suse-csafSUSE-SU-2021:1977-1
suse-csafSUSE-SU-2021:1623-1
🔗

References & Sources

9
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/2021/01/19/6Mailing ListThird Party Advisory
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e99502f76271d6bc4e374fe368c50c67a1fd3070PatchVendor Advisory
https://github.com/torvalds/linux/commit/e99502f76271d6bc4e374fe368c50c67a1fd3070PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlMailing ListThird Party Advisory
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