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CVE-2022-3910

7.8 · HIGH

Use After Free vulnerability in Linux Kernel allows Privilege Escalation.

Published Nov 22, 2022CWE-416EPSS 1.05%

Overview

CVE-2022-3910 is a high-severity vulnerability. It was published on November 22, 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

Use After Free vulnerability in Linux Kernel allows Privilege Escalation. An improper Update of Reference Count in io_uring leads to Use-After-Free and Local Privilege Escalation.

When io_msg_ring was invoked with a fixed file, it called io_fput_file() which improperly decreased its reference count (leading to Use-After-Free and Local Privilege Escalation). Fixed files are permanently registered to the ring, and should not be put separately.

We recommend upgrading past commit https://github.com/torvalds/linux/commit/fc7222c3a9f56271fba02aabbfbae999042f1679 https://github.com/torvalds/linux/commit/fc7222c3a9f56271fba02aabbfbae999042f1679

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

GitHubgithub.com/torvalds/linux/commit/fc7222c3a9f56271fba02aabbfbae999042f1679Refkernel.dance/#fc7222c3a9f56271fba02aabbfbae999042f1679GitHubgithub.com/torvalds/linux/commit/fc7222c3a9f56271fba02aabbfbae999042f1679Refkernel.dance/#fc7222c3a9f56271fba02aabbfbae999042f1679

How CyberStrike helps

Frequently asked questions

What is CVE-2022-3910?

CVE-2022-3910 is a high-severity vulnerability. It was published on November 22, 2022 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2022-3910?

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-2022-3910?

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-2022-3910?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-3910 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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