PCI: pnv_php: Fix surprise plug detection and recovery

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-38623
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-08-22 16:15:35 UTC
Updated2026-11-05 22:17:21 UTC
DescriptionIn 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 pci_bus_to_OF_node() returns NULL. [bhelgaas: tidy comments]

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 360aebd85a4c946764f6301d68de2a817fad5159 6e7b5f922901585b8f11e0d6cda12bda5c59fc8a git Not specified
CNA Linux Linux affected 360aebd85a4c946764f6301d68de2a817fad5159 2ec8ec57bb8ebde3e2a015eff80e5d66e6634fe3 git Not specified
CNA Linux Linux affected 360aebd85a4c946764f6301d68de2a817fad5159 473999ba937eac9776be791deed7c84a21d7880b git Not specified
CNA Linux Linux affected 360aebd85a4c946764f6301d68de2a817fad5159 6e7b24c71e530a6c1d656e73d8a30ee081656844 git Not specified
CNA Linux Linux affected 360aebd85a4c946764f6301d68de2a817fad5159 48c6935a34981bb56f35be0774ec1f30c6e386f8 git Not specified
CNA Linux Linux affected 360aebd85a4c946764f6301d68de2a817fad5159 1d2f63680c5719a5da92639e981c6c9a87fcee08 git Not specified
CNA Linux Linux affected 360aebd85a4c946764f6301d68de2a817fad5159 78d20b8c13075eae3d884c21db7a09a6bbdda5b2 git Not specified
CNA Linux Linux affected 360aebd85a4c946764f6301d68de2a817fad5159 a2a2a6fc2469524caa713036297c542746d148dc git Not specified
CNA Linux Linux affected 4.9 Not specified
CNA Linux Linux unaffected 4.9 semver Not specified
CNA Linux Linux unaffected 5.10.241 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.190 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.148 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.102 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.42 6.12.* semver Not specified
CNA Linux Linux unaffected 6.15.10 6.15.* semver Not specified
CNA Linux Linux unaffected 6.16.1 6.16.* semver Not specified
CNA Linux Linux unaffected 6.17 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
lists.debian.org/debian-lts-announce/2025/10/msg00008.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Third Party Advisory
git.kernel.org/stable/c/1d2f63680c5719a5da92639e981c6c9a87fcee08 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/6e7b24c71e530a6c1d656e73d8a30ee081656844 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a2a2a6fc2469524caa713036297c542746d148dc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/48c6935a34981bb56f35be0774ec1f30c6e386f8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/2ec8ec57bb8ebde3e2a015eff80e5d66e6634fe3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/473999ba937eac9776be791deed7c84a21d7880b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/78d20b8c13075eae3d884c21db7a09a6bbdda5b2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/6e7b5f922901585b8f11e0d6cda12bda5c59fc8a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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