Security readout for executives and security teams
Plain-English summary
This flaw affects OP-TEE 3.3.0 and earlier, a trusted execution environment used in some embedded and device firmware. A rounding error could allow code or data from a previous Trusted Application to be exposed. The public record names OP-TEE 3.4.0 and later as fixed.
Executive priority
Prioritize where OP-TEE protects secrets, payment, identity, DRM, device integrity, or regulated workloads. Without evidence of active exploitation, this is not automatically an emergency, but vulnerable firmware should be scheduled for remediation because TEE data leakage can undermine security assumptions.
Technical view
CVE-2019-1010294 is a rounding error in the optee_os component of Linaro/OP-TEE. The stated impact is potential leakage of code and/or data from a previous Trusted Application. The source bundle does not provide CVSS, CWE, detailed exploit prerequisites, or proof of active exploitation.
Likely exposure
Exposure is most likely in products or firmware that embed OP-TEE 3.3.0 or earlier. This primarily concerns embedded, mobile, IoT, and hardware-backed security use cases where OP-TEE runs Trusted Applications. Exposure depends on the exact vendor firmware build.
Exploitation context
The provided sources do not show active exploitation, CISA KEV listing, exploit maturity, or attack complexity. Treat exploitation status as unconfirmed. The relevant risk is confidentiality loss across Trusted Application boundaries if a vulnerable OP-TEE build is present.
Researcher notes
The public record is sparse: no CVSS, CWE, affected platform matrix, or exploit details are provided. Analysis should focus on confirming OP-TEE version lineage and whether downstream vendors backported the fix. Avoid assuming all devices using OP-TEE are affected without firmware evidence.
Mitigation direction
- Upgrade OP-TEE to version 3.4.0 or later where you control the build.
- Obtain vendor firmware that incorporates the OP-TEE upstream fix.
- Check device or SoC vendor advisories for product-specific remediation guidance.
- Track affected firmware until upgraded or vendor-confirmed not vulnerable.
Validation and detection
- Inventory firmware, SBOMs, or build manifests for OP-TEE version evidence.
- Confirm whether OP-TEE is 3.3.0 or earlier in deployed images.
- Verify updated firmware includes OP-TEE 3.4.0 or later.
- Check whether vendor release notes reference the upstream fixing commit.
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-2019-1010294 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
- 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/OP-TEE/optee_os/commit/7e768f8a473409215fe3fff8f6e31f8a3a0103c6CVE 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.