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Bug#1108789: mbedtls: CVE-2025-49087: Timing side-channel in block ciph

From Salvatore Bonaccorso@21:1/5 to All on Sat Jul 5 09:50:01 2025

Source: mbedtls
Version: 3.6.3-1
Severity: important
Tags: security upstream
X-Debbugs-Cc: [email protected], Debian Security Team <[email protected]>

Hi,

The following vulnerability was published for mbedtls.

CVE-2025-49087[0]:
| Timing side-channel in block cipher decryption with PKCS#7 padding

If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2025-49087
https://www.cve.org/CVERecord?id=CVE-2025-49087
[1] https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2025-06-5.md

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore

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