CVE-2019-17498 Integer overflow in n/a

What is CVE-2019-17498?

CVE-2019-17498 is a high-severity vulnerability in Debian Debian Linux, published on 21 Oct 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

In libssh2 v1.9.0 and earlier versions, the SSH_MSG_DISCONNECT logic in packet.c has an integer overflow in a bounds check, enabling an attacker to specify an arbitrary (out-of-bounds) offset for a subsequent memory read. A crafted SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server.

Weakness: CWE-190

Which versions are affected by CVE-2019-17498?

It affects 10 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Libssh2 Libssh2, Netapp Active Iq Unified Manager, Netapp Bootstrap Os, Netapp Element Software and 4 more.

How do I fix CVE-2019-17498?

Upgrade to a fixed version.

Is CVE-2019-17498 being exploited?

There is no known exploitation of CVE-2019-17498 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

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 ALPINE-CVE-2019-17498, AZL-6650, DEBIAN-CVE-2019-17498, DLA-1991-1, GHSA-h2hf-mx7w-fhwm, JLSEC-2025-188 and 10 more.