Vulnerability identifier: #VU94104

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-27390

CWE-ID: CWE-399

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to the way the synchronize_net() function is called within the ipv6_mc_down() function in net/ipv6/mcast.c, which can lead to long synchronization up to 5 minutes. A remote attacker can perform a denial of service (DoS) attack by initiating multiple connections.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel:

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External links
http://git.kernel.org/stable/c/9d159d6637ccce25f879d662a480541ef4ba3a50
http://git.kernel.org/stable/c/a03ede2282ebbd181bd6f5c38cbfcb5765afcd04
http://git.kernel.org/stable/c/26d4bac55750d535f1f0b8790dc26daf6089e373
http://git.kernel.org/stable/c/7eb06ee5921189812e6b4bfe7b0f1e878be16df7
http://git.kernel.org/stable/c/5da9a218340a2bc804dc4327e5804392e24a0b88
http://git.kernel.org/stable/c/17ef8efc00b34918b966388b2af0993811895a8c

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.