CVE-2025-38623

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Source
https://cve.org/CVERecord?id=CVE-2025-38623
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38623.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-38623
Downstream
Related
Published
2025-08-22T16:00:32.046Z
Modified
2026-03-20T12:42:57.078292Z
Summary
PCI: pnv_php: Fix surprise plug detection and recovery
Details

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

PCI: pnv_php: Fix surprise plug detection and recovery

The existing PowerNV hotplug code did not handle surprise plug events correctly, leading to a complete failure of the hotplug system after device removal and a required reboot to detect new devices.

This comes down to two issues:

1) When a device is surprise removed, often the bridge upstream port will cause a PE freeze on the PHB. If this freeze is not cleared, the MSI interrupts from the bridge hotplug notification logic will not be received by the kernel, stalling all plug events on all slots associated with the PE.

2) When a device is removed from a slot, regardless of surprise or programmatic removal, the associated PHB/PE ls left frozen. If this freeze is not cleared via a fundamental reset, skiboot is unable to clear the freeze and cannot retrain / rescan the slot. This also requires a reboot to clear the freeze and redetect the device in the slot.

Issue the appropriate unfreeze and rescan commands on hotplug events, and don't oops on hotplug if pcibustoOFnode() returns NULL.

[bhelgaas: tidy comments]

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38623.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
360aebd85a4c946764f6301d68de2a817fad5159
Fixed
6e7b5f922901585b8f11e0d6cda12bda5c59fc8a
Fixed
2ec8ec57bb8ebde3e2a015eff80e5d66e6634fe3
Fixed
473999ba937eac9776be791deed7c84a21d7880b
Fixed
6e7b24c71e530a6c1d656e73d8a30ee081656844
Fixed
48c6935a34981bb56f35be0774ec1f30c6e386f8
Fixed
1d2f63680c5719a5da92639e981c6c9a87fcee08
Fixed
78d20b8c13075eae3d884c21db7a09a6bbdda5b2
Fixed
a2a2a6fc2469524caa713036297c542746d148dc

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38623.json"