CVE-2023-2019 Use after free in Linux kernel's netdevsim device driver

What is CVE-2023-2019?

CVE-2023-2019 is a medium-severity use after free vulnerability in Linux kernel, published on 24 Apr 2023. 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 Linux kernel's netdevsim device driver, within the scheduling of events. This issue results from the improper management of a reference count. This may allow an attacker to create a denial of service condition on the system.

Weakness: CWE-911

Which versions are affected by CVE-2023-2019?

It affects 2 products.

Products include Linux kernel, Redhat Enterprise Linux.

How do I fix CVE-2023-2019?

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-2023-2019 being exploited?

There is no known exploitation of CVE-2023-2019 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-26378, DEBIAN-CVE-2023-2019, GHSA-9vmw-8f7f-qhch, UBUNTU-CVE-2023-2019.