Linux Kernel up to 5.18.14 nfnetlink_queue.c nfqnl_mangle denial of service

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.18.14. It has been classified as problematic. This impacts the function nfqnl_mangle of the file net/netfilter/nfnetlink_queue.c. Performing a manipulation results in denial of service. This vulnerability was named CVE-2022-36946. The attack may be initiated remotely. There is no available exploit. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 5.18.14 (Operating System). This affects the function nfqnl_mangle of the file net/netfilter/nfnetlink_queue.c. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

nfqnl_mangle in net/netfilter/nfnetlink_queue.c in the Linux kernel through 5.18.14 allows remote attackers to cause a denial of service (panic) because, in the case of an nf_queue verdict with a one-byte nfta_payload attribute, an skb_pull can encounter a negative skb->len.

The weakness was presented 07/28/2022. It is possible to read the advisory at marc.info. This vulnerability is uniquely identified as CVE-2022-36946 since 07/27/2022. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 233373 (Amazon Linux 2 : kernel (ALASKERNEL-5.10-2025-086)), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at marc.info.

The vulnerability is also documented in the vulnerability database at Tenable (233373). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.18.0
• 5.18.1
• 5.18.2
• 5.18.3
• 5.18.4
• 5.18.5
• 5.18.6
• 5.18.7
• 5.18.8
• 5.18.9
• 5.18.10
• 5.18.11
• 5.18.12
• 5.18.13
• 5.18.14

License

• open-source

Website

• Vendor: https://www.kernel.org/

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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