CVE-2024-46681 pktgen: use cpus_read_lock() in pg_net_init()

What is CVE-2024-46681?

CVE-2024-46681 is a medium-severity vulnerability in Linux kernel, published on 13 Sep 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:

pktgen: use cpus_read_lock() in pg_net_init()

I have seen the WARN_ON(smp_processor_id() != cpu) firing in pktgen_thread_worker() during tests.

We must use cpus_read_lock()/cpus_read_unlock() around the for_each_online_cpu(cpu) loop.

While we are at it use WARN_ON_ONCE() to avoid a possible syslog flood.

Which versions are affected by CVE-2024-46681?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-46681?

Apply the vendor's patch.

Is CVE-2024-46681 being exploited?

There is no known exploitation of CVE-2024-46681 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-49328, AZL-49341, BELL-CVE-2024-46681, DEBIAN-CVE-2024-46681, GHSA-5mq7-93mw-h965, ROOT-OS-DEBIAN-11-CVE-2024-46681 and 3 more.