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CVE-2022-48933

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: fix memory leak during stateful obj update stateful objects can be updated from the control plane.

Published Aug 22, 2024CWE-401EPSS 0.21%

Overview

CVE-2022-48933 is a medium-severity vulnerability. It was published on August 22, 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 memory leak during stateful obj update

stateful objects can be updated from the control plane.

The transaction logic allocates a temporary object for this purpose.

The ->init function was called for this object, so plain kfree() leaks

resources. We must call ->destroy function of the object.

nft_obj_destroy does this, but it also decrements the module refcount,

but the update path doesn't increment it.

To avoid special-casing the update object release, do module_get for

the update case too and release it via nft_obj_destroy().

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/34bb90e407e3288f610558beaae54ecaa32b11c4Refgit.kernel.org/stable/c/53026346a94c43f35c32b18804041bc483271d87Refgit.kernel.org/stable/c/7e9880e81d3fd6a43c202f205717485290432826Refgit.kernel.org/stable/c/dad3bdeef45f81a6e90204bcc85360bb76eccec7Refgit.kernel.org/stable/c/e96e204ee6fa46702f6c94c3c69a09e69e0eac52

How CyberStrike helps

Frequently asked questions

What is CVE-2022-48933?

CVE-2022-48933 is a medium-severity vulnerability. It was published on August 22, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-48933?

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-2022-48933?

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-2022-48933?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-48933 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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