Security readout for executives and security teams
CVE-2020-8834 is a Linux KVM flaw on Power8 systems. A guest VM attacker who already can run code in the guest kernel can corrupt host stack state and crash the host kernel, disrupting all workloads on that host. Exposure is likely limited to Linux KVM virtualization hosts on Power8 processors, especially kernels or vendor backports containing the affected Book3S HV code. General x86 virtualization estates are not indicated as affected in the provided sources. Treat this as a targeted infrastructure availability risk. It is not broadly internet-exploitable based on the sources, but unpatched affected hypervisors could let a compromised or malicious privileged guest crash the host. Mitigation focus: Update affected Linux kernel packages using vendor advisories for the deployed distribution.; Prioritize Power8 KVM hosts running kernels derived from Linux 4.8 through pre-fix 4.18 code.; Confirm vendor kernels include the referenced 4.18 fix or equivalent backport..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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Open ATT&CK lookupCVE-2020-8834 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
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CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H24Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.openwall.com/lists/oss-security/2020/04/06/2CVE reference · x_refsource_MISC
- https://usn.ubuntu.com/usn/usn-4318-1CVE reference · x_refsource_MISC
- https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1867717CVE reference · x_refsource_MISC
- USN-4318-1CVE reference · vendor-advisory, x_refsource_UBUNTU
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Context Switching Race Condition
Context Switching Race Condition represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.