CVE-2019-15666 Denial of service in n/a

What is CVE-2019-15666?

CVE-2019-15666 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 27 Aug 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

An issue was discovered in the Linux kernel before 5.0.19. There is an out-of-bounds array access in __xfrm_policy_unlink, which will cause denial of service, because verify_newpolicy_info in net/xfrm/xfrm_user.c mishandles directory validation.

Weakness: CWE-125

Which versions are affected by CVE-2019-15666?

It affects 3 products.

Products include Debian Debian Linux, Linux kernel, Opensuse Leap.

How do I fix CVE-2019-15666?

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-2019-15666 being exploited?

There is no known exploitation of CVE-2019-15666 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

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• 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 DEBIAN-CVE-2019-15666, GHSA-v95m-j7gp-qgr2, UBUNTU-CVE-2019-15666.