CVE-2024-56564 ceph: pass cred pointer to ceph_mds_auth_match()

What is CVE-2024-56564?

CVE-2024-56564 is a medium-severity vulnerability in Linux kernel, published on 27 Dec 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:

ceph: pass cred pointer to ceph_mds_auth_match()

This eliminates a redundant get_current_cred() call, because ceph_mds_check_access() has already obtained this pointer.

As a side effect, this also fixes a reference leak in ceph_mds_auth_match(): by omitting the get_current_cred() call, no additional cred reference is taken.

Which versions are affected by CVE-2024-56564?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-56564?

Apply the vendor's patch.

Is CVE-2024-56564 being exploited?

There is no known exploitation of CVE-2024-56564 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-2024-56564, DEBIAN-CVE-2024-56564, GHSA-83mx-7rq3-8xwj, UBUNTU-CVE-2024-56564.