Covert Timing Channel Affecting mbedtls package, versions <3.6.4-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-ALPINE320-MBEDTLS-10876054
- published22 Jul 2025
- disclosed20 Jul 2025
Introduced: 20 Jul 2025
NewCVE-2025-49087 (opens in a new tab)How to fix?
Upgrade Alpine:3.20 mbedtls to version 3.6.4-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream mbedtls package and not the mbedtls package as distributed by Alpine.
See How to fix? for Alpine:3.20 relevant fixed versions and status.
In Mbed TLS 3.6.1 through 3.6.3 before 3.6.4, a timing discrepancy in block cipher padding removal allows an attacker to recover the plaintext when PKCS#7 padding mode is used.