PT-2025-49033 · Linux+3 · Linux Kernel+3
Published
2025-08-26
·
Updated
2026-05-07
·
CVE-2025-40219
CVSS v2.0
5.5
Medium
| Vector | AV:L/AC:M/Au:S/C:P/I:P/A:C |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The Linux kernel had a synchronization issue related to SR-IOV (Single Root I/O Virtualization) enabling and disabling. Specifically, the
sriov disable() function lacked proper locking mechanisms when removing PCI devices representing Virtual Functions (VFs). This lack of locking could lead to double removal and list corruption, particularly observed on s390 systems. The issue stemmed from the absence of serialization against concurrent remove and rescan operations using the pci rescan remove lock. The problem was exacerbated by the interaction with hot-unplug events generated by the platform, which could race with the VF removal process. The fix involves adding the missing locking to the sriov del vfs() helper function and ensuring proper locking in sriov add vfs() as well, including error cases.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Deserialization of Untrusted Data
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Weakness Enumeration
Related Identifiers
Affected Products
Debian
Linuxmint
Linux Kernel
Ubuntu