CVE Explorer
CVE-2025-66442
In Mbed TLS through 4.0.0, there is a compiler-induced timing side channel (in RSA and CBC/ECB decryption) that only occurs with LLVM's select-optimize feature. TF-PSA-Crypto through 1.0.0 is also affected.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1
Preserved source conflicts
No provider value was silently selected as the winner.
cwe · 2 assertions
{"description":"n/a","lang":"en","type":"text"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:cf175c8d28f6aae0d155f6a5bb91559bf1d2e498a24a05ea047ef009eb8ea560 · sha256:e70a902e2b2085c2… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-385","description":"CWE-385 Covert Timing Channel","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:cf175c8d28f6aae0d155f6a5bb91559bf1d2e498a24a05ea047ef009eb8ea560 · sha256:e70a902e2b2085c2… · /containers/adp/0/problemTypes/0/descriptions/0
Affected products and versions
1 source assertion{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:cf175c8d28f6aae0d155f6a5bb91559bf1d2e498a24a05ea047ef009eb8ea560 · sha256:e70a902e2b2085c2… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":5.1,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:cf175c8d28f6aae0d155f6a5bb91559bf1d2e498a24a05ea047ef009eb8ea560 · sha256:e70a902e2b2085c2… · /containers/adp/0/metrics/0/cvssV3_1
CWE assertions
2 source assertions{"description":"n/a","lang":"en","type":"text"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:cf175c8d28f6aae0d155f6a5bb91559bf1d2e498a24a05ea047ef009eb8ea560 · sha256:e70a902e2b2085c2… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-385","description":"CWE-385 Covert Timing Channel","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:cf175c8d28f6aae0d155f6a5bb91559bf1d2e498a24a05ea047ef009eb8ea560 · sha256:e70a902e2b2085c2… · /containers/adp/0/problemTypes/0/descriptions/0
Source references
4 source assertions{"url":"https://github.com/Mbed-TLS/TF-PSA-Crypto/releases"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:cf175c8d28f6aae0d155f6a5bb91559bf1d2e498a24a05ea047ef009eb8ea560 · sha256:e70a902e2b2085c2… · /containers/cna/references/2
{"url":"https://github.com/Mbed-TLS/mbedtls/releases"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:cf175c8d28f6aae0d155f6a5bb91559bf1d2e498a24a05ea047ef009eb8ea560 · sha256:e70a902e2b2085c2… · /containers/cna/references/0
{"url":"https://mbed-tls.readthedocs.io/en/latest/security-advisories/"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:cf175c8d28f6aae0d155f6a5bb91559bf1d2e498a24a05ea047ef009eb8ea560 · sha256:e70a902e2b2085c2… · /containers/cna/references/1
{"url":"https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-03-compiler-induced-constant-time-violations/"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:cf175c8d28f6aae0d155f6a5bb91559bf1d2e498a24a05ea047ef009eb8ea560 · sha256:e70a902e2b2085c2… · /containers/cna/references/3
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.