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CVE-2022-48643

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: fix nft_counters_enabled underflow at nf_tables_addchain() syzbot is reporting underflow of nft_counters_…

Published Apr 28, 2024CWE-191EPSS 0.23%

Overview

CVE-2022-48643 is a medium-severity vulnerability. It was published on April 28, 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:

netfilter: nf_tables: fix nft_counters_enabled underflow at nf_tables_addchain()

syzbot is reporting underflow of nft_counters_enabled counter at

nf_tables_addchain() [1], for commit 43eb8949cfdffa76 ("netfilter:

nf_tables: do not leave chain stats enabled on error") missed that

nf_tables_chain_destroy() after nft_basechain_init() in the error path of

nf_tables_addchain() decrements the counter because nft_basechain_init()

makes nft_is_base_chain() return true by setting NFT_CHAIN_BASE flag.

Increment the counter immediately after returning from

nft_basechain_init().

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/710e3f526bd23a0d33435dedc52c3144de284378Refgit.kernel.org/stable/c/8bcad2a931313aeba076b76922d5813ef97d0a91Refgit.kernel.org/stable/c/91aa52652f4b37089aff3cb53e83049d826fef6dRefgit.kernel.org/stable/c/921ebde3c0d22c8cba74ce8eb3cc4626abff1ccdRefgit.kernel.org/stable/c/710e3f526bd23a0d33435dedc52c3144de284378Refgit.kernel.org/stable/c/8bcad2a931313aeba076b76922d5813ef97d0a91Refgit.kernel.org/stable/c/91aa52652f4b37089aff3cb53e83049d826fef6dRefgit.kernel.org/stable/c/921ebde3c0d22c8cba74ce8eb3cc4626abff1ccd

How CyberStrike helps

Frequently asked questions

What is CVE-2022-48643?

CVE-2022-48643 is a medium-severity vulnerability. It was published on April 28, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-48643?

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-2022-48643?

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-2022-48643?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-48643 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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