CVE-2024-57927 nfs: Fix oops in nfs_netfs_init_request() when copying to cache

What is CVE-2024-57927?

CVE-2024-57927 is a medium-severity vulnerability in Linux kernel, published on 19 Jan 2025. 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:

nfs: Fix oops in nfs_netfs_init_request() when copying to cache

When netfslib wants to copy some data that has just been read on behalf of nfs, it creates a new write request and calls nfs_netfs_init_request() to initialise it, but with a NULL file pointer. This causes nfs_file_open_context() to oops - however, we don't actually need the nfs context as we're only going to write to the cache.

Fix this by just returning if we aren't given a file pointer and emit a warning if the request was for something other than copy-to-cache.

Further, fix nfs_netfs_free_request() so that it doesn't try to free the context if the pointer is NULL.

Weakness: CWE-476

Which versions are affected by CVE-2024-57927?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-57927?

Apply the vendor's patch.

Is CVE-2024-57927 being exploited?

There is no known exploitation of CVE-2024-57927 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 BELL-CVE-2024-57927, DEBIAN-CVE-2024-57927, GHSA-j58h-ppm8-rm4x, UBUNTU-CVE-2024-57927.