Security readout for executives and security teams
Plain-English summary
CVE-2022-31076 can let a highly privileged, authenticated cloud-side user crash KubeEdge CloudCore when the unixsocket feature is enabled. The reported impact is service availability, not data theft or tampering. Exposure is narrow, but edge orchestration outages can still disrupt operations.
Executive priority
Treat as a targeted availability risk, not a broad internet-facing compromise. Patch during the next controlled maintenance window, faster for production edge control planes where CloudCore outages would disrupt service.
Technical view
Affected KubeEdge versions contain a nil-pointer dereference in the CloudCore UDS Server. A malicious message can crash CloudCore when the CloudHub unixsocket switch is enabled in cloudcore.yaml. The advisory limits reachability to the local host network and notes UDS Server communication is cloud-side with the CSI Driver.
Likely exposure
Most relevant to KubeEdge deployments running affected versions with CloudCore configured with the unixsocket switch enabled. The source states an attacker must already be an authenticated cloud user and have local host network reachability.
Exploitation context
The source bundle does not report active exploitation, and KEV is false. The CVSS vector indicates adjacent attack vector, high attack complexity, high privileges required, no user interaction, and high availability impact only.
Researcher notes
This is CWE-476 nil-pointer dereference with CVSS 3.1 score 4.2. Validate exposure through version and configuration, not exploit testing. Evidence is specific about prerequisites and impact, but the bundle does not provide broader exploitation telemetry.
Mitigation direction
- Upgrade KubeEdge to 1.11.0, 1.10.1, or 1.9.3 as applicable.
- If upgrade is not possible, disable the CloudHub unixsocket switch in cloudcore.yaml.
- Prioritize environments where CloudCore availability affects production edge workloads.
- Check vendor guidance before applying alternative workarounds.
Validation and detection
- Inventory KubeEdge versions and identify deployments below fixed releases.
- Review cloudcore.yaml for the CloudHub unixsocket switch setting.
- Confirm CloudCore is deployed where authenticated cloud users could reach local host services.
- Review operational logs for unexplained CloudCore crashes or restarts.
Public sources used
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
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-476: Exact CWE lookup
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Open ATT&CK lookupContainer behavior lookup
The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2022-31076 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
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:A/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H0.53.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.2MediumVector: CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/kubeedge/kubeedge/security/advisories/GHSA-8f4f-v9x5-cg6jCVE reference · x_refsource_CONFIRM
- https://github.com/kubeedge/kubeedge/pull/3899/commits/5d60ae9eabd6b6b7afe38758e19bbe8137664701CVE reference · x_refsource_MISC
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.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.