CVE-2020-25672 Denial of service in Linux Kernel

What is CVE-2020-25672?

CVE-2020-25672 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 25 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A memory leak vulnerability was found in Linux kernel in llcp_sock_connect

Weakness: CWE-401

Which versions are affected by CVE-2020-25672?

It affects 14 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Linux kernel, Netapp Active Iq Unified Manager, Netapp Cloud Backup, Netapp H300e Firmware and 8 more.

How do I fix CVE-2020-25672?

Apply the vendor's patch.

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-2020-25672 being exploited?

There is no known exploitation of CVE-2020-25672 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 AZL-34855, AZL-6524, DEBIAN-CVE-2020-25672, GHSA-jm6x-w8xx-hpwq, UBUNTU-CVE-2020-25672.