PCI: pnv_php: Clean up allocated IRQs on unplug

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-38624
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: Clean up allocated IRQs on unplug When the root of a nested PCIe bridge configuration is unplugged, the pnv_php driver leaked the allocated IRQ resources for the child bridges' hotplug event notifications, resulting in a panic. Fix this by walking all child buses and deallocating all its IRQ resources before calling pci_hp_remove_devices(). Also modify the lifetime of the workqueue at struct pnv_php_slot::wq so that it is only destroyed in pnv_php_free_slot(), instead of pnv_php_disable_irq(). This is required since pnv_php_disable_irq() will now be called by workers triggered by hot unplug interrupts, so the workqueue needs to stay allocated. The abridged kernel panic that occurs without this patch is as follows: WARNING: CPU: 0 PID: 687 at kernel/irq/msi.c:292 msi_device_data_release+0x6c/0x9c CPU: 0 UID: 0 PID: 687 Comm: bash Not tainted 6.14.0-rc5+ #2 Call Trace: msi_device_data_release+0x34/0x9c (unreliable) release_nodes+0x64/0x13c devres_release_all+0xc0/0x140 device_del+0x2d4/0x46c pci_destroy_dev+0x5c/0x194 pci_hp_remove_devices+0x90/0x128 pci_hp_remove_devices+0x44/0x128 pnv_php_disable_slot+0x54/0xd4 power_write_file+0xf8/0x18c pci_slot_attr_store+0x40/0x5c sysfs_kf_write+0x64/0x78 kernfs_fop_write_iter+0x1b0/0x290 vfs_write+0x3bc/0x50c ksys_write+0x84/0x140 system_call_exception+0x124/0x230 system_call_vectored_common+0x15c/0x2ec [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 8c1ad4af160691e157d688ad9619ced2df556aac git Not specified
CNA Linux Linux affected 360aebd85a4c946764f6301d68de2a817fad5159 912e200240b6f9758f0b126e64a61c9227f4ad37 git Not specified
CNA Linux Linux affected 360aebd85a4c946764f6301d68de2a817fad5159 398170b7fd0e0db2f8096df5206c75e5ff41415a git Not specified
CNA Linux Linux affected 360aebd85a4c946764f6301d68de2a817fad5159 32173edf3fe2d447e14e5e3b299387c6f9602a88 git Not specified
CNA Linux Linux affected 360aebd85a4c946764f6301d68de2a817fad5159 28aa3cfce12487614219e7667ec84424e1f43227 git Not specified
CNA Linux Linux affected 360aebd85a4c946764f6301d68de2a817fad5159 1773c19fa55e944cdd2634e2d9e552f87f2d38d5 git Not specified
CNA Linux Linux affected 360aebd85a4c946764f6301d68de2a817fad5159 bbd302c4b79df10197ffa7270ca3aa572eeca33c git Not specified
CNA Linux Linux affected 360aebd85a4c946764f6301d68de2a817fad5159 4668619092554e1b95c9a5ac2941ca47ba6d548a 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/1773c19fa55e944cdd2634e2d9e552f87f2d38d5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/4668619092554e1b95c9a5ac2941ca47ba6d548a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/8c1ad4af160691e157d688ad9619ced2df556aac 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/398170b7fd0e0db2f8096df5206c75e5ff41415a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/912e200240b6f9758f0b126e64a61c9227f4ad37 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/28aa3cfce12487614219e7667ec84424e1f43227 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/32173edf3fe2d447e14e5e3b299387c6f9602a88 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/bbd302c4b79df10197ffa7270ca3aa572eeca33c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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