CVE-2024-56647

5.5 · MEDIUM

Published Dec 27, 2024 linux EPSS 0.22% (13th pctl) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-56647 is a medium-severity vulnerability affecting linux linux_kernel. 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 and patches from linux. Update linux_kernel to the latest patched version. 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.

Affected Products

Vendor	Product	Versions	Status
linux	linux_kernel	>= 2.6.25, < 6.12.5	Affected

References

Ref git.kernel.org/stable/c/9545011e7b2a8fc0cbd6e387a09f12cd41d7d82f Ref git.kernel.org/stable/c/c44daa7e3c73229f7ac74985acb8c7fb909c4e0a Ref git.kernel.org/stable/c/d50981aaaefc3b04490fbc8274d37881a2b1b112 Ref git.kernel.org/stable/c/da54b3039d436227deebbc202cefea63bd318a38

Frequently Asked Questions

What is CVE-2024-56647?

CVE-2024-56647 is a medium-severity vulnerability affecting linux linux_kernel. 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?

How can CyberStrike help with CVE-2024-56647?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-56647 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

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