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CVE-2022-49076

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: RDMA/hfi1: Fix use-after-free bug for mm struct Under certain conditions, such as MPI_Abort, the hfi1 cleanup code may represen…

Published Feb 26, 2025CWE-416EPSS 0.26%

Overview

CVE-2022-49076 is a high-severity vulnerability. It was published on February 26, 2025 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

In the Linux kernel, the following vulnerability has been resolved:

RDMA/hfi1: Fix use-after-free bug for mm struct

Under certain conditions, such as MPI_Abort, the hfi1 cleanup code may

represent the last reference held on the task mm.

hfi1_mmu_rb_unregister() then drops the last reference and the mm is freed

before the final use in hfi1_release_user_pages(). A new task may

allocate the mm structure while it is still being used, resulting in

problems. One manifestation is corruption of the mmap_sem counter leading

to a hang in down_write(). Another is corruption of an mm struct that is

in use by another task.

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/0b7186d657ee55e2cdefae498f07d5c1961e8023Refgit.kernel.org/stable/c/2bbac98d0930e8161b1957dc0ec99de39ade1b3cRefgit.kernel.org/stable/c/5a9a1b24ddb510715f8f621263938186579a965cRefgit.kernel.org/stable/c/5f54364ff6cfcd14cddf5441c4a490bb28dd69f7Refgit.kernel.org/stable/c/9ca11bd8222a612de0d2f54d050bfcf61ae2883f

How CyberStrike helps

Frequently asked questions

What is CVE-2022-49076?

CVE-2022-49076 is a high-severity vulnerability. It was published on February 26, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2022-49076?

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-2022-49076?

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-2022-49076?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-49076 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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