In the Linux kernel, the following vulnerability has been resolved:
s390/pci: Fix potential double remove of hotplug slot
In commit 6ee600bfbe0f ("s390/pci: remove hotplug slot when releasing the device") the zpci_exit_slot() was moved from zpci_device_reserved() to zpci_release_device() with the intention of keeping the hotplug slot around until the device is actually removed.
Now zpci_release_device() is only called once all references are dropped. Since the zPCI subsystem only drops its reference once the device is in the reserved state it follows that zpci_release_device() must only deal with devices in the reserved state. Despite that it contains code to tear down from both configured and standby state. For the standby case this already includes the removal of the hotplug slot so would cause a double removal if a device was ever removed in either configured or standby state.
Instead of causing a potential double removal in a case that should never happen explicitly WARN_ON() if a device in non-reserved state is released and get rid of the dead code cases.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 27, 2026 | Jul 27, 2026 |
| Redhat_linux | — | — | Jul 9, 2025 | Dec 28, 2024 |
| Ubuntu | — | Upgrade linux-image-generic-hwe-24.04Upgrade linux-image-oracle-64kUpgrade linux-image-6.11.0-1015-oemUpgrade linux-image-oracleUpgrade linux-image-6.11.0-1008-raspiUpgrade linux-image-oem-24.04Upgrade linux-image-6.11.0-1009-awsUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-realtimeUpgrade linux-image-6.11.0-1010-lowlatency-64kUpgrade linux-image-awsUpgrade linux-image-raspiUpgrade linux-image-6.11.0-1010-lowlatencyUpgrade linux-image-oem-24.04aUpgrade linux-image-6.11.0-18-generic-64kUpgrade linux-image-generic-64kUpgrade linux-image-gcpUpgrade linux-image-genericUpgrade linux-image-6.11.0-1011-oracle-64kUpgrade linux-image-lowlatency-64kUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-virtualUpgrade linux-image-6.11.0-1009-azure-fdeUpgrade linux-image-6.11.0-1009-gcpUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-6.11.0-1005-realtimeUpgrade linux-image-azureUpgrade linux-image-oem-24.04bUpgrade linux-image-6.11.0-1009-azureUpgrade linux-image-6.11.0-1011-oracleUpgrade linux-image-lowlatencyUpgrade linux-image-6.11.0-18-genericUpgrade linux-image-azure-fde | Feb 20, 2025 | Dec 28, 2024 |
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