CVE-2019-15523 Other in n/a

What is CVE-2019-15523?

CVE-2019-15523 is a medium-severity vulnerability in Debian Debian Linux, published on 30 Dec 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in LINBIT csync2 through 2.0. It does not correctly check for the return value GNUTLS_E_WARNING_ALERT_RECEIVED of the gnutls_handshake() function. It neglects to call this function again, as required by the design of the API.

Weakness: CWE-252

Which versions are affected by CVE-2019-15523?

It affects 2 products.

Products include Debian Debian Linux, Linbit Csync2.

How do I fix CVE-2019-15523?

Apply the vendor's patch.

Is CVE-2019-15523 being exploited?

There is no known exploitation of CVE-2019-15523 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as CLEANSTART-2023-SQ43460, DEBIAN-CVE-2019-15523, DLA-2515-1, GHSA-hw3p-w63h-mj9c, UBUNTU-CVE-2019-15523.