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CVE-2024-33621

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: ipvlan: Dont Use skb->sk in ipvlan_process_v{4,6}_outbound Raw packet from PF_PACKET socket ontop of an IPv6-backed ipvlan devi…

Published Jun 21, 2024EPSS 0.27%

Overview

CVE-2024-33621 is a medium-severity vulnerability. It was published on June 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:

ipvlan: Dont Use skb->sk in ipvlan_process_v{4,6}_outbound

Raw packet from PF_PACKET socket ontop of an IPv6-backed ipvlan device will

hit WARN_ON_ONCE() in sk_mc_loop() through sch_direct_xmit() path.

WARNING: CPU: 2 PID: 0 at net/core/sock.c:775 sk_mc_loop+0x2d/0x70

Modules linked in: sch_netem ipvlan rfkill cirrus drm_shmem_helper sg drm_kms_helper

CPU: 2 PID: 0 Comm: swapper/2 Kdump: loaded Not tainted 6.9.0+ #279

Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014

RIP: 0010:sk_mc_loop+0x2d/0x70

Code: fa 0f 1f 44 00 00 65 0f b7 15 f7 96 a3 4f 31 c0 66 85 d2 75 26 48 85 ff 74 1c

RSP: 0018:ffffa9584015cd78 EFLAGS: 00010212

RAX: 0000000000000011 RBX: ffff91e585793e00 RCX: 0000000002c6a001

RDX: 0000000000000000 RSI: 0000000000000040 RDI: ffff91e589c0f000

RBP: ffff91e5855bd100 R08: 0000000000000000 R09: 3d00545216f43d00

R10: ffff91e584fdcc50 R11: 00000060dd8616f4 R12: ffff91e58132d000

R13:

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/0049a623dfbbb49888de7f0c2f33a582b5ead989Refgit.kernel.org/stable/c/13c4543db34e0da5a7d2f550b6262d860f248381Refgit.kernel.org/stable/c/183c4b416454b9983dc1b8aa0022b748911adc48Refgit.kernel.org/stable/c/1abbf079da59ef559d0ab4219d2a0302f7970761Refgit.kernel.org/stable/c/54213c09801e0bd2549ac42961093be36f65a7d0Refgit.kernel.org/stable/c/54768bacfde60e8e4757968d79f8726711dd2cf5Refgit.kernel.org/stable/c/b3dc6e8003b500861fa307e9a3400c52e78e4d3aRefgit.kernel.org/stable/c/cb53706a3403ba67f4040b2a82d9cf79e11b1a48Refgit.kernel.org/stable/c/0049a623dfbbb49888de7f0c2f33a582b5ead989Refgit.kernel.org/stable/c/13c4543db34e0da5a7d2f550b6262d860f248381

How CyberStrike helps

Frequently asked questions

What is CVE-2024-33621?

CVE-2024-33621 is a medium-severity vulnerability. It was published on June 21, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-33621?

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-2024-33621?

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-2024-33621?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-33621 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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