What’s Vulnerable › Vulnerabilities

CVE-2020-10941

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-03-24 · updated 2026-06-17

Description

Arm Mbed TLS before 2.16.5 allows attackers to obtain sensitive information (an RSA private key) by measuring cache usage during an import.

Affected products

• Arm Mbed Crypto: before 3.1.0 — fixed in 3.1.0
• mbedtls: before 2.16.5 — fixed in 2.16.5
• Debian Linux: 10.0
• Fedoraproject Fedora: 31, 32

How to fix

Upgrade to a fixed version: Arm Mbed Crypto 3.1.0; mbedtls 2.16.5. Check the vendor advisory for mitigations.

References

• https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5JPE2HFBDJF3UBT6Q4VWLKNKCVCMX25J/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WD6OSOLLAR2AVPJAMGUKWRXN6477IHHV/
• https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2020-02
• https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5JPE2HFBDJF3UBT6Q4VWLKNKCVCMX25J/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WD6OSOLLAR2AVPJAMGUKWRXN6477IHHV/
• https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2020-02

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