CVE-2024-50087 btrfs: fix uninitialized pointer free on read_alloc_one_name() error

What is CVE-2024-50087?

CVE-2024-50087 is a high-severity vulnerability in Linux kernel, published on 29 Oct 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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

btrfs: fix uninitialized pointer free on read_alloc_one_name() error

The function read_alloc_one_name() does not initialize the name field of the passed fscrypt_str struct if kmalloc fails to allocate the corresponding buffer. Thus, it is not guaranteed that fscrypt_str.name is initialized when freeing it.

This is a follow-up to the linked patch that fixes the remaining instances of the bug introduced by commit e43eec81c516 ("btrfs: use struct qstr instead of name and namelen pairs").

Weakness: CWE-824

Which versions are affected by CVE-2024-50087?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-50087?

Apply the vendor's patch.

Is CVE-2024-50087 being exploited?

There is no known exploitation of CVE-2024-50087 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-51915, BELL-CVE-2024-50087, DEBIAN-CVE-2024-50087, GHSA-cxc4-ppv4-gfgj, UBUNTU-CVE-2024-50087.