CVE-2020-27673
First published: Thu Oct 22 2020(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.16-1 | |
| Linux kernel | >=2.6.12<4.4.244 | |
| Linux kernel | >=4.5.0<4.9.244 | |
| Linux kernel | >=4.10.0<4.14.207 | |
| Linux kernel | >=4.15.0<4.19.155 | |
| Linux kernel | >=4.20.0<5.4.75 | |
| Linux kernel | >=5.5.0<5.9.5 | |
| Linux kernel | =5.10-rc1 | |
| Debian | =9.0 | |
| openSUSE | =15.1 | |
| openSUSE | =15.2 | |
| Xen xen-unstable | <=4.14.0 |
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.html
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.html
- http://www.openwall.com/lists/oss-security/2021/01/19/6
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e99502f76271d6bc4e374fe368c50c67a1fd3070
- https://github.com/torvalds/linux/commit/e99502f76271d6bc4e374fe368c50c67a1fd3070
- https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
- https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html
- https://security.gentoo.org/glsa/202011-06
- https://xenbits.xen.org/xsa/advisory-332.html
- https://launchpad.net/bugs/cve/CVE-2020-27673
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27673
- https://nvd.nist.gov/vuln/detail/CVE-2020-27673
- https://security-tracker.debian.org/tracker/CVE-2020-27673
- https://ubuntu.com/security/CVE-2020-27673
Frequently Asked Questions
What is the severity of CVE-2020-27673?
CVE-2020-27673 is classified as a denial of service vulnerability affecting the Linux kernel.
How do I fix CVE-2020-27673?
To mitigate CVE-2020-27673, upgrade the Linux kernel to at least version 5.10.223-1 or a later version.
Which systems are affected by CVE-2020-27673?
CVE-2020-27673 primarily affects Linux kernel versions up to 5.9.1 and Xen versions up to 4.14.x.
What is the impact of CVE-2020-27673?
CVE-2020-27673 can lead to a denial of service by causing the host OS to hang when subjected to a high rate of events.
Is my Linux distribution affected by CVE-2020-27673?
Yes, distributions using affected versions of the Linux kernel, such as Debian and openSUSE, are vulnerable to CVE-2020-27673.
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