Security readout for executives and security teams
Plain-English summary
This Oracle Solaris kernel issue can let a highly privileged logged-in user trigger a full denial of service. The main business risk is outage: affected Solaris systems may hang or crash repeatedly. The sources do not show data theft, privilege escalation, or confirmed active exploitation.
Executive priority
Treat as a targeted availability risk, not a broad internet-facing emergency. Prioritize critical Solaris hosts and systems with many privileged users, especially if outages would affect business operations.
Technical view
CVE-2022-21439 affects Oracle Solaris 10 and 11 kernel components. It is local, low-complexity, requires high privileges and separate user interaction, and impacts availability only. CVSS 3.1 is 4.2 with vector AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:H.
Likely exposure
Exposure is limited to environments still running Oracle Solaris 10 or 11. Risk is highest where highly privileged local access exists on important Solaris hosts and outage would disrupt critical services.
Exploitation context
The provided sources do not indicate active exploitation, and the CVE is not listed as KEV. Exploitation requires logged-in high privileges plus human interaction by another person, which limits broad remote attack likelihood.
Researcher notes
The public bundle does not provide CWE, root cause detail, trigger conditions, or exact patch identifiers. Analysis should stay focused on local high-privilege availability impact and Oracle's referenced CPU guidance.
Mitigation direction
- Inventory Oracle Solaris 10 and 11 systems.
- Review Oracle's July 2022 Critical Patch Update guidance.
- Apply vendor-approved Solaris fixes where available.
- Restrict high-privileged local access to Solaris hosts.
- Prioritize systems supporting critical services.
Validation and detection
- Confirm Solaris version on each affected host.
- Verify installed patch level against Oracle CPU guidance.
- Review privileged user access on Solaris systems.
- Check incident records for unexplained hangs or repeated crashes.
- Document exceptions where vendor fixes cannot be applied.
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.
CVE-2022-21439 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/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:L/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:H0.63.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.2MediumVector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.oracle.com/security-alerts/cpujul2022.htmlCVE 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.