Debian Security Advisory

DLA-2826-1 mbedtls -- LTS security update

Date Reported:
23 Nov 2021
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2018-9988, CVE-2018-9989, CVE-2020-36475, CVE-2020-36476, CVE-2020-36478, CVE-2021-24119.
More information:

Several vulnerabilities were discovered in mbed TLS, a lightweight crypto and SSL/TLS library, which could result in denial of service, information disclosure or side-channel attacks.

For Debian 9 stretch, these problems have been fixed in version 2.4.2-1+deb9u4.

We recommend that you upgrade your mbedtls packages.

For the detailed security status of mbedtls please refer to its security tracker page at:

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: