CVE-2025-37819

System crash via freed GICv2m callback

Published May 8, 2025 · Updated Jun 11, 2026

Use-after-free in the Linux kernel allows local users to crash an ACPI-based system during a runtime PCI host bridge probe. The gicv2m_get_fwnode callback in drivers/irqchip/irq-gic-v2m.c remains registered after its __init-marked code is freed, so PCI later dereferences released memory. Reachability requires an ACPI boot and a compatible GICv2m platform; the upstream report reproduces the paging fault on an Arm Juno board.

CVSS severity7.8
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel allows local users to crash an ACPI-based system during a runtime PCI host bridge probe. The gicv2m_get_fwnode callback in drivers/irqchip/irq-gic-v2m.c remains registered after its __init-marked code is freed, so PCI later dereferences released memory. Reachability requires an ACPI boot and a compatible GICv2m platform; the upstream report reproduces the paging fault on an Arm Juno board.

The record

CVE
CVE-2025-37819
Published
May 8, 2025
Updated
Jun 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0644b3daca28dcb320373ae20069c269c9386304 <0c241dedc43a036599757cd08f356253fa3e5014
  2. Affected versionversion=0644b3daca28dcb320373ae20069c269c9386304 <2f2803e4b5e4df2b08d378deaab78b1681ef9b30
  3. Affected versionversion=0644b3daca28dcb320373ae20069c269c9386304 <3318dc299b072a0511d6dfd8367f3304fb6d9827
  4. Affected versionversion=0644b3daca28dcb320373ae20069c269c9386304 <3939d6f29d34cdb60e3f68b76e39e00a964a1d51
  5. Affected versionversion=0644b3daca28dcb320373ae20069c269c9386304 <47bee0081b483b077c7560bc5358ad101f89c8ef
  6. Affected versionversion=0644b3daca28dcb320373ae20069c269c9386304 <b63de43af8d215b0499eac28b2caa4439183efc1
  7. Affected versionversion=0644b3daca28dcb320373ae20069c269c9386304 <dc0d654eb4179b06d3206e4396d072108b9ba082
  8. Affected versionversion=0644b3daca28dcb320373ae20069c269c9386304 <f95659affee301464f0d058d528d96b35b452da8
  9. Affected versionversion=4.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0644b3daca28dcb320373ae20069c269c9386304 <0c241dedc43a036599757cd08f356253fa3e5014; version=0644b3daca28dcb320373ae20069c269c9386304 <2f2803e4b5e4df2b08d378deaab78b1681ef9b30; version=0644b3daca28dcb320373ae20069c269c9386304 <3318dc299b072a0511d6dfd8367f3304fb6d9827; version=0644b3daca28dcb320373ae20069c269c9386304 <3939d6f29d34cdb60e3f68b76e39e00a964a1d51; version=0644b3daca28dcb320373ae20069c269c9386304 <47bee0081b483b077c7560bc5358ad101f89c8ef; version=0644b3daca28dcb320373ae20069c269c9386304 <b63de43af8d215b0499eac28b2caa4439183efc1; version=0644b3daca28dcb320373ae20069c269c9386304 <dc0d654eb4179b06d3206e4396d072108b9ba082; version=0644b3daca28dcb320373ae20069c269c9386304 <f95659affee301464f0d058d528d96b35b452da8; version=4.5

Published CVSS scores

5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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