CVE-2018-1000168 Denial of service in n/a

What is CVE-2018-1000168?

CVE-2018-1000168 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 8 May 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

nghttp2 version >= 1.10.0 and nghttp2 <= v1.31.0 contains an Improper Input Validation CWE-20 vulnerability in ALTSVC frame handling that can result in segmentation fault leading to denial of service. This attack appears to be exploitable via network client. This vulnerability appears to have been fixed in >= 1.31.1.

Weakness: CWE-20, CWE-476

Which versions are affected by CVE-2018-1000168?

It affects 3 products.

Products include Debian Debian Linux, Nghttp2 Nghttp2, Nodejs Node.js.

How do I fix CVE-2018-1000168?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2018-1000168 being exploited?

There is no known exploitation of CVE-2018-1000168 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-2018-1000168, CLEANSTART-2026-PZ96090, CLEANSTART-2026-QW15283, DEBIAN-CVE-2018-1000168, GHSA-q6fc-wp2r-hvq3, UBUNTU-CVE-2018-1000168.