CVE-2024-56742 vfio/mlx5: Fix an unwind issue in mlx5vf_add_migration_pages()

What is CVE-2024-56742?

CVE-2024-56742 is a low-severity denial of service vulnerability in Linux kernel, published on 29 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:

vfio/mlx5: Fix an unwind issue in mlx5vf_add_migration_pages()

Fix an unwind issue in mlx5vf_add_migration_pages().

If a set of pages is allocated but fails to be added to the SG table, they need to be freed to prevent a memory leak.

Any pages successfully added to the SG table will be freed as part of mlx5vf_free_data_buffer().

Weakness: CWE-401

Which versions are affected by CVE-2024-56742?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-56742?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2024-56742 being exploited?

There is no known exploitation of CVE-2024-56742 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-55011, BELL-CVE-2024-56742, DEBIAN-CVE-2024-56742, GHSA-pmwc-7qq9-mj6g, ROOT-OS-DEBIAN-12-CVE-2024-56742, UBUNTU-CVE-2024-56742.