CVE-2024-50215 nvmet-auth: assign dh_key to NULL after kfree_sensitive

What is CVE-2024-50215?

CVE-2024-50215 is a high-severity use after free vulnerability in Linux kernel, published on 9 Nov 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

nvmet-auth: assign dh_key to NULL after kfree_sensitive

ctrl->dh_key might be used across multiple calls to nvmet_setup_dhgroup() for the same controller. So it's better to nullify it after release on error path in order to avoid double free later in nvmet_destroy_auth().

Found by Linux Verification Center (linuxtesting.org) with Svace.

Weakness: CWE-415

Which versions are affected by CVE-2024-50215?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-50215?

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-2024-50215 being exploited?

There is no known exploitation of CVE-2024-50215 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-53084, BELL-CVE-2024-50215, DEBIAN-CVE-2024-50215, GHSA-frfw-f98c-6jvj, UBUNTU-CVE-2024-50215.