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CVE-2024-33621

5.5 · MEDIUM
Published Jun 21, 2024 linux EPSS 0.27% (19th pctl)

Overview

CVE-2024-33621 is a medium-severity vulnerability affecting linux linux_kernel. 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 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 >= 3.19, < 4.19.316 Affected

References

Ref git.kernel.org/stable/c/0049a623dfbbb49888de7f0c2f33a582b5ead989 Ref git.kernel.org/stable/c/13c4543db34e0da5a7d2f550b6262d860f248381 Ref git.kernel.org/stable/c/183c4b416454b9983dc1b8aa0022b748911adc48 Ref git.kernel.org/stable/c/1abbf079da59ef559d0ab4219d2a0302f7970761 Ref git.kernel.org/stable/c/54213c09801e0bd2549ac42961093be36f65a7d0 Ref git.kernel.org/stable/c/54768bacfde60e8e4757968d79f8726711dd2cf5 Ref git.kernel.org/stable/c/b3dc6e8003b500861fa307e9a3400c52e78e4d3a Ref git.kernel.org/stable/c/cb53706a3403ba67f4040b2a82d9cf79e11b1a48 Ref git.kernel.org/stable/c/0049a623dfbbb49888de7f0c2f33a582b5ead989 Ref git.kernel.org/stable/c/13c4543db34e0da5a7d2f550b6262d860f248381

Frequently Asked Questions

What is CVE-2024-33621?

CVE-2024-33621 is a medium-severity vulnerability affecting linux linux_kernel. 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 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.

How can CyberStrike help with CVE-2024-33621?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-33621 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

Autonomous Discovery

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Code Review

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HackBrowser

Browser-based exploitation validates findings with real proof-of-concept.

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