Security readout for executives and security teams
Plain-English summary
This CVE concerns a Rust library, signal-simple, that marked a generic channel type as thread-safe without checking whether the contained data was actually safe to share across threads. For organizations, risk exists only where software depends on this crate and uses the affected type in concurrent code.
Executive priority
Treat this as a targeted dependency hygiene issue, not a broad emergency based on current evidence. Prioritize if Rust systems use signal-simple in production concurrency paths, especially critical services, but do not claim active exploitation from the supplied sources.
Technical view
signal-simple through 2020-11-15 unconditionally implements Send and Sync for SyncChannel<T>. That can violate Rust's thread-safety guarantees when T is not safe to send or share between threads. The source bundle does not provide CVSS, CWE, exact fixed version, or concrete impact examples.
Likely exposure
Exposure is most likely in Rust applications or libraries that include signal-simple through 2020-11-15, especially where SyncChannel<T> is used across thread boundaries. The supplied affected-product metadata is incomplete and lists vendor, product, versions, and CPEs as n/a.
Exploitation context
The provided sources do not show active exploitation, and the CVE is not listed as KEV. Exploitability depends on application-specific use of SyncChannel<T>, the contained type T, and whether concurrent access reaches unsafe or memory-sensitive behavior.
Researcher notes
The key issue is trait unsoundness: unconditional Send and Sync for SyncChannel<T> can make non-thread-safe T appear safe to move or share. Source evidence is sparse; confirm exact crate versions, upstream commits, and remediation status before assigning operational severity.
Mitigation direction
- Inventory Rust dependencies for signal-simple usage.
- Check RustSec and upstream crate guidance for patched or replacement versions.
- Update, remove, or replace the crate where vendor guidance supports it.
- Audit SyncChannel<T> usage across thread boundaries.
- Prioritize review in services handling untrusted data or high-availability workloads.
Validation and detection
- Review Cargo.lock, manifests, and SBOMs for signal-simple.
- Identify code paths that instantiate or pass SyncChannel<T>.
- Confirm whether affected versions are present through dependency scanning.
- Verify remediation against RustSec advisory status before closure.
- Document any accepted risk where no reachable affected use exists.
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-2020-36446 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://rustsec.org/advisories/RUSTSEC-2020-0126.htmlCVE reference · x_refsource_MISC
- https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/signal-simple/RUSTSEC-2020-0126.mdCVE 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.