CVE-2020-29568
First published: Tue Dec 15 2020(Updated: )
An issue was discovered in Xen through 4.14.x. Some OSes (such as Linux, FreeBSD, and NetBSD) are processing watch events using a single thread. If the events are received faster than the thread is able to handle, they will get queued. As the queue is unbounded, a guest may be able to trigger an OOM in the backend. All systems with a FreeBSD, Linux, or NetBSD (any version) dom0 are vulnerable.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Xen Xen | <=4.14.1 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.11.10-1 6.12.5-1 |
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Reference Links
- https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html
- https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
- https://security.gentoo.org/glsa/202107-30
- https://www.debian.org/security/2021/dsa-4843
- https://xenbits.xenproject.org/xsa/advisory-349.html
- https://launchpad.net/bugs/cve/CVE-2020-29568
- https://xenbits.xen.org/xsa/advisory-349.html
- https://security-tracker.debian.org/tracker/CVE-2020-29568
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-29568
- https://nvd.nist.gov/vuln/detail/CVE-2020-29568
- https://ubuntu.com/security/CVE-2020-29568
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