CVE-2024-0639 Kernel: potential deadlock on &net->sctp.addr_wq_lock leading to dos

What is CVE-2024-0639?

CVE-2024-0639 is a medium-severity denial of service vulnerability in Linux kernel, published on 17 Jan 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A denial of service vulnerability due to a deadlock was found in sctp_auto_asconf_init in net/sctp/socket.c in the Linux kernel’s SCTP subsystem. This flaw allows guests with local user privileges to trigger a deadlock and potentially crash the system.

Weakness: CWE-667, CWE-833

Which versions are affected by CVE-2024-0639?

It affects 2 products.

Products include Linux kernel, Redhat Enterprise Linux.

How do I fix CVE-2024-0639?

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-2024-0639 being exploited?

There is no known exploitation of CVE-2024-0639 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-33889, BELL-CVE-2024-0639, DEBIAN-CVE-2024-0639, GHSA-668p-x3m7-8w6v, UBUNTU-CVE-2024-0639.