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CVE-2024-50130

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: netfilter: bpf: must hold reference on net namespace BUG: KASAN: slab-use-after-free in __nf_unregister_net_hook+0x640/0x6b0 Re…

Published Nov 5, 2024CWE-416EPSS 0.23%

Overview

CVE-2024-50130 is a high-severity vulnerability. It was published on November 5, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. 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:

netfilter: bpf: must hold reference on net namespace

BUG: KASAN: slab-use-after-free in __nf_unregister_net_hook+0x640/0x6b0

Read of size 8 at addr ffff8880106fe400 by task repro/72=

bpf_nf_link_release+0xda/0x1e0

bpf_link_free+0x139/0x2d0

bpf_link_release+0x68/0x80

__fput+0x414/0xb60

Eric says:

It seems that bpf was able to defer the __nf_unregister_net_hook()

after exit()/close() time.

Perhaps a netns reference is missing, because the netns has been

dismantled/freed already.

bpf_nf_link_attach() does :

link->net = net;

But I do not see a reference being taken on net.

Add such a reference and release it after hook unreg.

Note that I was unable to get syzbot reproducer to work, so I

do not know if this resolves this splat.

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/1230fe7ad3974f7bf6c78901473e039b34d4fb1fRefgit.kernel.org/stable/c/d0d7939543a1b3bb93af9a18d258a774daf8f162Refgit.kernel.org/stable/c/f41bd93b3e0508edc7ba820357f949071dcc0acc

How CyberStrike helps

Frequently asked questions

What is CVE-2024-50130?

CVE-2024-50130 is a high-severity vulnerability. It was published on November 5, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-50130?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-50130?

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-2024-50130?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-50130 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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