CVE-2024-46696 nfsd: fix potential UAF in nfsd4_cb_getattr_release

What is CVE-2024-46696?

CVE-2024-46696 is a critical use after free vulnerability in Linux kernel, published on 13 Sep 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:

nfsd: fix potential UAF in nfsd4_cb_getattr_release

Once we drop the delegation reference, the fields embedded in it are no longer safe to access. Do that last.

Weakness: CWE-416

Which versions are affected by CVE-2024-46696?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-46696?

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-2024-46696 being exploited?

There is no known exploitation of CVE-2024-46696 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-2024-46696, DEBIAN-CVE-2024-46696, GHSA-2h6h-vcrw-57ff, UBUNTU-CVE-2024-46696.