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CVE-2022-48861

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: vdpa: fix use-after-free on vp_vdpa_remove When vp_vdpa driver is unbind, vp_vdpa is freed in vdpa_unregister_device and then v…

Published Jul 16, 2024CWE-416EPSS 0.20%

Overview

CVE-2022-48861 is a medium-severity vulnerability. It was published on July 16, 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:

vdpa: fix use-after-free on vp_vdpa_remove

When vp_vdpa driver is unbind, vp_vdpa is freed in vdpa_unregister_device

and then vp_vdpa->mdev.pci_dev is dereferenced in vp_modern_remove,

triggering use-after-free.

Call Trace of unbinding driver free vp_vdpa :

do_syscall_64

vfs_write

kernfs_fop_write_iter

device_release_driver_internal

pci_device_remove

vp_vdpa_remove

vdpa_unregister_device

kobject_release

device_release

kfree

Call Trace of dereference vp_vdpa->mdev.pci_dev:

vp_modern_remove

pci_release_selected_regions

pci_release_region

pci_resource_len

pci_resource_end

(dev)->resource[(bar)].end

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/4b1743bc715a3691a63ac21b349079b07bf1b19eRefgit.kernel.org/stable/c/dc54ba9932aeaaa1a21fe214af1f446593a78274Refgit.kernel.org/stable/c/eb057b44dbe35ae14527830236a92f51de8f9184Refgit.kernel.org/stable/c/4b1743bc715a3691a63ac21b349079b07bf1b19eRefgit.kernel.org/stable/c/dc54ba9932aeaaa1a21fe214af1f446593a78274Refgit.kernel.org/stable/c/eb057b44dbe35ae14527830236a92f51de8f9184

How CyberStrike helps

Frequently asked questions

What is CVE-2022-48861?

CVE-2022-48861 is a medium-severity vulnerability. It was published on July 16, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-48861?

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-2022-48861?

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-2022-48861?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-48861 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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