CVE-2026-53324

Summary

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

net: mana: Use pci_name() for debugfs directory naming

Use pci_name(pdev) for the per-device debugfs directory instead of hardcoded "0" for PFs and pci_slot_name(pdev->slot) for VFs. The previous approach had two issues:

  1. pci_slot_name() dereferences pdev->slot, which can be NULL for VFs in environments like generic VFIO passthrough or nested KVM, causing a NULL pointer dereference.

  2. Multiple PFs would all use "0", and VFs across different PCI domains or buses could share the same slot name, leading to -EEXIST errors from debugfs_create_dir().

pci_name(pdev) returns the unique BDF address, is always valid, and is unique across the system.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux6607c17c6c5e029da03a90085db22daf518232bf < 34dbd7b819544c99c9d96b400fe4db613f40ac4baffected
LinuxLinux6607c17c6c5e029da03a90085db22daf518232bf < 9211eb97e8f8c28bf9313ab97862d143dbbbef97affected
LinuxLinux6607c17c6c5e029da03a90085db22daf518232bf < c116f07ab9d22bb6f355f3cf9e44c1e6a47fe559affected
LinuxLinux6.13affected
LinuxLinux0 < 6.13unaffected
LinuxLinux6.18.33 <= 6.18.*unaffected
LinuxLinux7.0.10 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References