Vulnerability · Published Oct 22, 2020 · Assigned by mitre
CVE-2020-27673
Medium 5.5
In plain English
A medium-severity security flaw in the linux package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.4%top 64.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 5.9.6-1 | DEBIAN-CVE-2020-27673 |
| Debian:13 | linux | 5.9.6-1 | DEBIAN-CVE-2020-27673 |
| Debian:14 | linux | 5.9.6-1 | DEBIAN-CVE-2020-27673 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2020-27673 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2020-27673 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2020-27673 |
Affected products (as reported)
References
- https://xenbits.xen.org/xsa/advisory-332.html x_refsource_MISC
- https://github.com/torvalds/linux/commit/e99502f76271d6bc4e374fe368c50c67a1fd3070 x_refsource_MISC
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e99502f76271d6bc4e374fe368c50c67a1fd3070 x_refsource_MISC
- openSUSE-SU-2020:1783 vendor-advisory, x_refsource_SUSE
- openSUSE-SU-2020:1844 vendor-advisory, x_refsource_SUSE
- GLSA-202011-06 vendor-advisory, x_refsource_GENTOO
- [debian-lts-announce] 20201210 [SECURITY] [DLA 2483-1] linux-4.19 security update mailing-list, x_refsource_MLIST
- [debian-lts-announce] 20201218 [SECURITY] [DLA 2494-1] linux security update mailing-list, x_refsource_MLIST
- [oss-security] 20210119 Xen Security Advisory 332 v4 (CVE-2020-27673) - Rogue guests can cause DoS of Dom0 via high frequency events mailing-list, x_refsource_MLIST