CVE-2024-27418 net: mctp: take ownership of skb in mctp_local_output

What is CVE-2024-27418?

CVE-2024-27418 is a medium-severity denial of service vulnerability in Linux kernel, published on 17 May 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:

net: mctp: take ownership of skb in mctp_local_output

Currently, mctp_local_output only takes ownership of skb on success, and we may leak an skb if mctp_local_output fails in specific states; the skb ownership isn't transferred until the actual output routing occurs.

Instead, make mctp_local_output free the skb on all error paths up to the route action, so it always consumes the passed skb.

Weakness: CWE-401

Which versions are affected by CVE-2024-27418?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-27418?

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-2024-27418 being exploited?

There is no known exploitation of CVE-2024-27418 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-42156, BELL-CVE-2024-27418, DEBIAN-CVE-2024-27418, GHSA-7xf4-wr6x-3r95, ROOT-OS-UBUNTU-2204-CVE-2024-27418, UBUNTU-CVE-2024-27418.