CVE-2017-8816 Integer overflow in curl and libcurl before 7.57.0

What is CVE-2017-8816?

CVE-2017-8816 is a critical vulnerability in Debian Debian Linux, published on 29 Nov 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The NTLM authentication feature in curl and libcurl before 7.57.0 on 32-bit platforms allows attackers to cause a denial of service (integer overflow and resultant buffer overflow, and application crash) or possibly have unspecified other impact via vectors involving long user and password fields.

Weakness: CWE-190

Which versions are affected by CVE-2017-8816?

It affects 3 products.

Products include Debian Debian Linux, Haxx Curl, Haxx Libcurl.

How do I fix CVE-2017-8816?

Upgrade to a fixed version.

Is CVE-2017-8816 being exploited?

There is no known exploitation of CVE-2017-8816 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 ALPINE-CVE-2017-8816, CLEANSTART-2026-LT52397, CURL-CVE-2017-8816, DEBIAN-CVE-2017-8816, GHSA-2546-5j9r-qggh, UBUNTU-CVE-2017-8816.