CVE-2020-25671 Use after free in Linux Kernel
A refcount leak in the Linux Kernel's llcp_sock_connect function allows attackers to trigger a use-after-free, potentially leading to privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-25671?
CVE-2020-25671 is a high-severity use after free vulnerability in Debian Debian Linux, published on 26 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was found in Linux Kernel, where a refcount leak in llcp_sock_connect() causing use-after-free which might lead to privilege escalations.
Weakness: CWE-416
Which versions are affected by CVE-2020-25671?
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-2020-25671?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2020-25671 being exploited?
There is no known exploitation of CVE-2020-25671 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2020-25671, GHSA-857m-9c4p-fvf4, UBUNTU-CVE-2020-25671.