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CVE-2024-56647

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: net: Fix icmp host relookup triggering ip_rt_bug arp link failure may trigger ip_rt_bug while xfrm enabled, call trace is: WAR…

Published Dec 27, 2024EPSS 0.22%

Overview

CVE-2024-56647 is a medium-severity vulnerability. It was published on December 27, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

net: Fix icmp host relookup triggering ip_rt_bug

arp link failure may trigger ip_rt_bug while xfrm enabled, call trace is:

WARNING: CPU: 0 PID: 0 at net/ipv4/route.c:1241 ip_rt_bug+0x14/0x20

Modules linked in:

CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.12.0-rc6-00077-g2e1b3cc9d7f7

Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),

BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014

RIP: 0010:ip_rt_bug+0x14/0x20

Call Trace:

<IRQ>

ip_send_skb+0x14/0x40

__icmp_send+0x42d/0x6a0

ipv4_link_failure+0xe2/0x1d0

arp_error_report+0x3c/0x50

neigh_invalidate+0x8d/0x100

neigh_timer_handler+0x2e1/0x330

call_timer_fn+0x21/0x120

__run_timer_base.part.0+0x1c9/0x270

run_timer_softirq+0x4c/0x80

handle_softirqs+0xac/0x280

irq_exit_rcu+0x62/0x80

sysvec_apic_timer_interrupt+0x77/0x90

The script below reproduces this scenario:

ip xfrm policy add src 0.0.0.0/0 dst 0.0.0.0/0 \

dir out priority 0 ptype main

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/9545011e7b2a8fc0cbd6e387a09f12cd41d7d82fRefgit.kernel.org/stable/c/c44daa7e3c73229f7ac74985acb8c7fb909c4e0aRefgit.kernel.org/stable/c/d50981aaaefc3b04490fbc8274d37881a2b1b112Refgit.kernel.org/stable/c/da54b3039d436227deebbc202cefea63bd318a38

How CyberStrike helps

Frequently asked questions

What is CVE-2024-56647?

CVE-2024-56647 is a medium-severity vulnerability. It was published on December 27, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-56647?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-56647?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-56647?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-56647 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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