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The ECDSA signature implementation in ecdsa.c in Arm Mbed Crypto 2.1 and Mbed TLS through 2.19.1 does not reduce the blinded scalar before computing the inverse, which allows a local attacker to recover the private key via side-channel attacks.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade mbedtls3Upgrade mbedtlsUpgrade mbedtls2 | Aug 22, 2024 | Jan 23, 2020 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jan 23, 2020 |
| Debian | — | Upgrade mbedtls | Dec 28, 2022 | Jan 23, 2020 |
| Freebsd | — | Upgrade mbedtls | Dec 10, 2025 | Feb 24, 2020 |
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