Security readout for executives and security teams
Plain-English summary
CVE-2019-1010066 affects LLNL msr-safe v1.1.0. A flaw in ioctl whitelist checking could let an attacker write CPU model-specific registers, an operation normally limited to root. This matters most on systems that intentionally run msr-safe and expose it to non-root users or processes.
Executive priority
Prioritize this for environments that use msr-safe on shared or multi-user systems. Business urgency is lower if msr-safe is absent, but potentially significant where non-root workloads could affect low-level CPU register behavior.
Technical view
The issue is incorrect access control in msr-safe v1.1.0 ioctl handling. The CVE states a whitelist-checking bug could allow writes to model-specific registers normally reserved for root. The listed fixed version is v1.2.0. No CVSS, CWE, exploit details, or affected CPEs are provided in the source bundle.
Likely exposure
Exposure appears limited to systems running LLNL msr-safe v1.1.0, especially where non-root users or workloads can access the ioctl interface. The source bundle does not indicate remote exposure or affected downstream distributions.
Exploitation context
The source bundle says the attack vector is abuse of ioctl whitelist checking to write model-specific registers. KEV is false, and the provided sources do not show active exploitation, public exploit availability, or weaponized details.
Researcher notes
The evidence is sparse: no CVSS, CWE mapping, CPEs, or exploit references are provided. Analysis should center on the v1.1.0 to v1.2.0 diff, ioctl access paths, and whether local users can reach the affected interface.
Mitigation direction
- Upgrade LLNL msr-safe from v1.1.0 to fixed version v1.2.0.
- Restrict access to the msr-safe ioctl interface to trusted users until upgraded.
- Remove msr-safe from systems where it is not operationally required.
- Check LLNL project guidance before production rollout.
Validation and detection
- Inventory systems for installed LLNL msr-safe version v1.1.0.
- Confirm upgraded systems report msr-safe v1.2.0 or later.
- Review permissions around the msr-safe ioctl interface.
- Check whether untrusted users or workloads can access affected hosts.
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
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CVE-2019-1010066 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/LLNL/msr-safe/compare/v1.1.0...v1.2.0CVE reference · x_refsource_MISC
- https://www.tldp.org/LDP/lkmpg/2.4/html/x856.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.