CVE-2021-3483 Use after free in kernel
A use-after-free flaw in the Linux kernel Nosy driver allows attackers to execute code, escalate privileges, or cause denial of service.
- 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-2021-3483?
CVE-2021-3483 is a high-severity use after free vulnerability in Debian Debian Linux, published on 17 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw was found in the Nosy driver in the Linux kernel. This issue allows a device to be inserted twice into a doubly-linked list, leading to a use-after-free when one of these devices is removed. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. Versions before kernel 5.12-rc6 are affected
Weakness: CWE-416
Which versions are affected by CVE-2021-3483?
It affects 11 products.
Products include Debian Debian Linux, Linux kernel, Netapp Cloud Backup, Netapp H300e Firmware, Netapp H300s Firmware, Netapp H410c Firmware and 5 more.
How do I fix CVE-2021-3483?
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-2021-3483 being exploited?
There is no known exploitation of CVE-2021-3483 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as AZL-6568, DEBIAN-CVE-2021-3483, GHSA-jvqw-v5h3-ccw4, UBUNTU-CVE-2021-3483.