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CVE-2022-34918

7.8 · HIGH

An issue was discovered in the Linux kernel through 5.18.9.

Published Jul 4, 2022CWE-843EPSS 5.45%

Overview

CVE-2022-34918 is a high-severity vulnerability. It was published on July 4, 2022 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

An issue was discovered in the Linux kernel through 5.18.9. A type confusion bug in nft_set_elem_init (leading to a buffer overflow) could be used by a local attacker to escalate privileges, a different vulnerability than CVE-2022-32250. (The attacker can obtain root access, but must start with an unprivileged user namespace to obtain CAP_NET_ADMIN access.) This can be fixed in nft_setelem_parse_data in net/netfilter/nf_tables_api.c.

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

Refpacketstormsecurity.com/files/168191/Kernel-Live-Patch-Security-Notice-LSN-0089-1.htmlRefpacketstormsecurity.com/files/168543/Netfilter-nft_set_elem_init-Heap-Overflow-Privilege-Escalation.htmlRefwww.openwall.com/lists/oss-security/2022/07/05/1Refwww.openwall.com/lists/oss-security/2022/08/06/5Refgit.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=7e6bc1f6cabcd30aba0b11219d8e01b952eacbb6Reflore.kernel.org/netfilter-devel/cd9428b6-7ffb-dd22-d949-d86f4869f452%40randorisec.fr/T/#uRefsecurity.netapp.com/advisory/ntap-20220826-0004/Refwww.debian.org/security/2022/dsa-5191Refwww.openwall.com/lists/oss-security/2022/07/02/3Refwww.randorisec.fr/crack-linux-firewall/

How CyberStrike helps

Frequently asked questions

What is CVE-2022-34918?

CVE-2022-34918 is a high-severity vulnerability. It was published on July 4, 2022 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2022-34918?

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-2022-34918?

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-2022-34918?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-34918 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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