CVE-2024-49980

5.5 · MEDIUM

Published Oct 21, 2024 linux CWE-667 EPSS 0.18% (7th pctl) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-49980 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:

vrf: revert "vrf: Remove unnecessary RCU-bh critical section"

This reverts commit 504fc6f4f7f681d2a03aa5f68aad549d90eab853.

dev_queue_xmit_nit is expected to be called with BH disabled.

__dev_queue_xmit has the following:

/* Disable soft irqs for various locks below. Also

* stops preemption for RCU.

rcu_read_lock_bh();

VRF must follow this invariant. The referenced commit removed this

protection. Which triggered a lockdep warning:

================================

WARNING: inconsistent lock state

6.11.0 #1 Tainted: G W

--------------------------------

inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.

btserver/134819 [HC0[0]:SC0[0]:HE1:SE1] takes:

ffff8882da30c118 (rlock-AF_PACKET){+.?.}-{2:2}, at: tpacket_rcv+0x863/0x3b30

{IN-SOFTIRQ-W} state was registered at:

lock_acquire+0x19a/0x4f0

_raw_spin_lock+0x27/0x40

packet_rcv+0xa33/0x1320

__netif_receiv

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	>= 6.6, < 6.6.55	Affected

References

Ref git.kernel.org/stable/c/718a752bd746b3f4dd62516bb437baf73d548415 Ref git.kernel.org/stable/c/8c9381b3138246d46536db93ed696832abd70204 Ref git.kernel.org/stable/c/b04c4d9eb4f25b950b33218e33b04c94e7445e51 Ref git.kernel.org/stable/c/e61f8c4d179b2ffc0d3b7f821c3734be738643d0

Frequently Asked Questions

What is CVE-2024-49980?

CVE-2024-49980 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-2024-49980?

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-2024-49980?

How can CyberStrike help with CVE-2024-49980?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-49980 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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