CVE-2025-37819

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

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.

N/A

CVSS

Severity:

EPSS 0.03%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/0c241dedc43a036599757cd08f356253fa3e5014
https://git.kernel.org/stable/c/b63de43af8d215b0499eac28b2caa4439183efc1
https://git.kernel.org/stable/c/f95659affee301464f0d058d528d96b35b452da8
https://git.kernel.org/stable/c/dc0d654eb4179b06d3206e4396d072108b9ba082
https://git.kernel.org/stable/c/2f2803e4b5e4df2b08d378deaab78b1681ef9b30
https://git.kernel.org/stable/c/3939d6f29d34cdb60e3f68b76e39e00a964a1d51
https://git.kernel.org/stable/c/47bee0081b483b077c7560bc5358ad101f89c8ef
https://git.kernel.org/stable/c/3318dc299b072a0511d6dfd8367f3304fb6d9827

Frequently Asked Questions

What is the severity of CVE-2025-37819?: CVE-2025-37819 has not yet been assigned a CVSS score.
How to fix CVE-2025-37819?: To fix CVE-2025-37819, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-37819 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-37819 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-37819?: CVE-2025-37819 affects Linux Linux, Linux Linux.

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