CVE-2024-35857 icmp: prevent possible NULL dereferences from icmp_build_probe()

What is CVE-2024-35857?

CVE-2024-35857 is a high-severity vulnerability in Linux kernel, published on 17 May 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

icmp: prevent possible NULL dereferences from icmp_build_probe()

First problem is a double call to __in_dev_get_rcu(), because the second one could return NULL.

if (__in_dev_get_rcu(dev) && __in_dev_get_rcu(dev)->ifa_list)

Second problem is a read from dev->ip6_ptr with no NULL check:

if (!list_empty(&rcu_dereference(dev->ip6_ptr)->addr_list))

Use the correct RCU API to fix these.

v2: add missing include <net/addrconf.h>

Weakness: CWE-476

Which versions are affected by CVE-2024-35857?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-35857?

Apply the vendor's patch.

Is CVE-2024-35857 being exploited?

There is no known exploitation of CVE-2024-35857 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-42117, BELL-CVE-2024-35857, DEBIAN-CVE-2024-35857, GHSA-fpgv-fc8m-fmmm, UBUNTU-CVE-2024-35857.