CVE-2024-47684

5.5 · MEDIUM

Published Oct 21, 2024 linux CWE-476 EPSS 0.28% (20th pctl) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-47684 is a medium-severity vulnerability affecting linux linux_kernel. It was published on October 21, 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:

tcp: check skb is non-NULL in tcp_rto_delta_us()

We have some machines running stock Ubuntu 20.04.6 which is their 5.4.0-174-generic

kernel that are running ceph and recently hit a null ptr dereference in

tcp_rearm_rto(). Initially hitting it from the TLP path, but then later we also

saw it getting hit from the RACK case as well. Here are examples of the oops

messages we saw in each of those cases:

Jul 26 15:05:02 rx [11061395.780353] BUG: kernel NULL pointer dereference, address: 0000000000000020

Jul 26 15:05:02 rx [11061395.787572] #PF: supervisor read access in kernel mode

Jul 26 15:05:02 rx [11061395.792971] #PF: error_code(0x0000) - not-present page

Jul 26 15:05:02 rx [11061395.798362] PGD 0 P4D 0

Jul 26 15:05:02 rx [11061395.801164] Oops: 0000 [#1] SMP NOPTI

Jul 26 15:05:02 rx [11061395.805091] CPU: 0 PID: 9180 Comm: msgr-worker-1 Tainted: G W 5.4.0-174-generic #193-Ubuntu

Jul 26 15:05:02 rx [11061395.814996]

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	>= 4.13, < 5.10.227	Affected

References

Frequently Asked Questions

What is CVE-2024-47684?

CVE-2024-47684 is a medium-severity vulnerability affecting linux linux_kernel. It was published on October 21, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-47684?

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-2024-47684?

How can CyberStrike help with CVE-2024-47684?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-47684 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.

How CyberStrike Helps

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HackBrowser

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