Is cmov affected by CVE-2026-23519?

crates.io cmov is affected in <0.4.4.

Is CVE-2026-23519 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.5%.

high

CVE-2026-23519

Q: Is CVE-2026-23519 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.5%.

crates.io · cmov

Summary

RustCrypto Utilities cmov: `thumbv6m-none-eabi` compiler emits non-constant time assembly when using `cmovnz`

Severity: high
EPSS: 0.5% (p39)
Also known as: GHSA-2gqc-6j2q-83qp, RUSTSEC-2026-0003
Published: 2026-01-15

References

https://github.com/RustCrypto/utils/security/advisories/GHSA-2gqc-6j2q-83qp
https://nvd.nist.gov/vuln/detail/CVE-2026-23519
https://github.com/RustCrypto/utils/commit/55977257e7c82a309d5e8abfdd380a774f0f9778

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.