CVE-2019-5815 Nokogiri implementation of libxslt vulnerable to heap corruption

What is CVE-2019-5815?

CVE-2019-5815 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 11 Dec 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Type confusion in xsltNumberFormatGetMultipleLevel prior to libxslt 1.1.33 could allow attackers to potentially exploit heap corruption via crafted XML data.

Weakness: CWE-843, CWE-787

Which versions are affected by CVE-2019-5815?

2 open source packages ship an affected version, including nokogiri. It affects 2 products.

Products include Debian Debian Linux, Xmlsoft Libxslt.

How do I fix CVE-2019-5815?

Upgrade nokogiri to 1.10.5 or later.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2019-5815 being exploited?

There is no known exploitation of CVE-2019-5815 in the wild and no public exploit code.

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• 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 DEBIAN-CVE-2019-5815, GHSA-vmfx-gcfq-wvm2, UBUNTU-CVE-2019-5815.