CVE-2020-27673
MEDIUMCVSS 5.5/10EPSS 0.41%
Last modified
CVE-2020-27673 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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.. EPSS estimates a 0.41% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Linux | Linux Kernel | >= 2.6.12, < 4.4.244 | — |
| Linux | Linux Kernel | >= 4.5.0, < 4.9.244 | — |
| Linux | Linux Kernel | >= 4.10.0, < 4.14.207 | — |
| Linux | Linux Kernel | >= 4.15.0, < 4.19.155 | — |
| Linux | Linux Kernel | >= 4.20.0, < 5.4.75 | — |
| Linux | Linux Kernel | >= 5.5.0, < 5.9.5 | — |
| Linux | Linux Kernel | 5.10 | Rc1 |
| Debian | Debian Linux | 9.0 | — |
| Opensuse | Leap | 15.1 | — |
| Opensuse | Leap | 15.2 | — |
| Xen | Xen | <= 4.14.0 | — |
References
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.htmlMailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/01/19/6Mailing List, Third Party Advisory
- https://github.com/torvalds/linux/commit/e99502f76271d6bc4e374fe368c50c67a1fd3070Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00027.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202011-06Third Party Advisory
- https://xenbits.xen.org/xsa/advisory-332.htmlPatch, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.htmlMailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/01/19/6Mailing List, Third Party Advisory
- https://github.com/torvalds/linux/commit/e99502f76271d6bc4e374fe368c50c67a1fd3070Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00027.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202011-06Third Party Advisory
- https://xenbits.xen.org/xsa/advisory-332.htmlPatch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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 denial of service (host OS hang) via a high rate of events to dom0, aka CID-e99502f76271.
How severe is CVE-2020-27673?
CVE-2020-27673 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.
How do I fix CVE-2020-27673?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2020-27673?
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Scan your code nowSource: NVD / NIST