An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through…
Priority LOW 25Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
EPSS 0.00415 36th percentileScored 2026-11-07
Fix Will not fix Red Hat: no fix planned
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 2.6.12 to before 4.4.244; 4.5.0 to before 4.9.244; 4.10.0 to before 4.14.207; 4.15.0 to before 4.19.155; 4.20.0 to before 5.4.75; 5.5.0 to before 5.9.5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.10:rc1:*:*:*:*:*:* | 5.10 rc1 | Vulnerable | Linux |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* | 15.1 | Vulnerable | openSUSE |
| cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* | 15.2 | Vulnerable | openSUSE |
| cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* | up to 4.14.0 | Vulnerable | Xen |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 2.6.12 to before 4.4.244; 4.5.0 to before 4.9.244; 4.10.0 to before 4.14.207; 4.15.0 to before 4.19.155; 4.20.0 to before 5.4.75; 5.5.0 to before 5.9.5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.10:rc1:*:*:*:*:*:* Versions 5.10 rc1 Vulnerable ·Linux
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE
- cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* Versions 15.2 Vulnerable ·openSUSE
- cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* Versions up to 4.14.0 Vulnerable ·Xen
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Out of support scope |
Not affected: 4 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise MRG 2
Timeline
- 2026-10-02 Threatist record created from CVE-2020-27673
- 2026-10-03 Alias added: GHSA-hj67-hpcv-3wx5
References
Patch 3
Advisory 6
- openSUSE-SU-2020:1783
- openSUSE-SU-2020:1844
- GLSA-202011-06
- [debian-lts-announce] 20201210 [SECURITY] [DLA 2483-1] linux-4.19 security update
- [debian-lts-announce] 20201218 [SECURITY] [DLA 2494-1] linux security update
- [oss-security] 20210119 Xen Security Advisory 332 v4 (CVE-2020-27673) - Rogue guests can cause DoS of Dom0 via high frequency events
Sources
- CVE-2020-27673 · CVE Program
- CVE-2020-27673 · NVD
- FIRST EPSS
- GHSA-hj67-hpcv-3wx5 · GitHub Advisory Database · CC BY 4.0
- CVE-2020-27673 · Red Hat security data · CC BY 4.0
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