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CVE-2025-37819

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: irqchip/gic-v2m: Prevent use after free of gicv2m_get_fwnode() With ACPI in place, gicv2m_get_fwnode() is registered with the p…

Published May 8, 2025CWE-416EPSS 0.22%

Overview

CVE-2025-37819 is a high-severity vulnerability. It was published on May 8, 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:

irqchip/gic-v2m: Prevent use after free of gicv2m_get_fwnode()

With ACPI in place, gicv2m_get_fwnode() is registered with the pci

subsystem as pci_msi_get_fwnode_cb(), which may get invoked at runtime

during a PCI host bridge probe. But, the call back is wrongly marked as

__init, causing it to be freed, while being registered with the PCI

subsystem and could trigger:

Unable to handle kernel paging request at virtual address ffff8000816c0400

gicv2m_get_fwnode+0x0/0x58 (P)

pci_set_bus_msi_domain+0x74/0x88

pci_register_host_bridge+0x194/0x548

This is easily reproducible on a Juno board with ACPI boot.

Retain the function for later use.

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/0c241dedc43a036599757cd08f356253fa3e5014Refgit.kernel.org/stable/c/2f2803e4b5e4df2b08d378deaab78b1681ef9b30Refgit.kernel.org/stable/c/3318dc299b072a0511d6dfd8367f3304fb6d9827Refgit.kernel.org/stable/c/3939d6f29d34cdb60e3f68b76e39e00a964a1d51Refgit.kernel.org/stable/c/47bee0081b483b077c7560bc5358ad101f89c8efRefgit.kernel.org/stable/c/b63de43af8d215b0499eac28b2caa4439183efc1Refgit.kernel.org/stable/c/dc0d654eb4179b06d3206e4396d072108b9ba082Refgit.kernel.org/stable/c/f95659affee301464f0d058d528d96b35b452da8Reflists.debian.org/debian-lts-announce/2025/08/msg00010.htmlReflists.debian.org/debian-lts-announce/2025/10/msg00007.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-37819?

CVE-2025-37819 is a high-severity vulnerability. It was published on May 8, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-37819?

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-2025-37819?

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-2025-37819?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-37819 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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