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CVE-2026-64475

vfio/pci: Release the VGA arbiter client on register_device() failure

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.261, 5.12, 5.13, 5.15.212, 6.1.178, and 4 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

Summary

In the Linux kernel, the following vulnerability has been resolved: vfio/pci: Release the VGA arbiter client on register_device() failure The re-order in the Fixes commit below displaced vfio_pci_vga_init() as the last failure point of what is now vfio_pci_core_register_device() without introducing an unwind for the VGA arbiter registration. In current kernels this is mostly benign because vfio_pci_set_decode() only uses pci_dev state, but the original failure path could leave a callback with a freed vdev cookie. The stale registration also becomes unsafe again once the callback follows drvdata to the vfio device. Add the required VGA unwind callout.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • Linux Linux

    From 87856f9af04eaacf9848710625a4ffee1d020fa9 · fixed in 0f2a35a0c7ea7da347b814750eaa78adf3582381; From 4aeec3984ddc853f7c65903bde472ffdef738bae · fixed in 8d65decde9afd2bd78bcfffdc0df73b82a0b5509; From 4aeec3984ddc853f7c65903bde472ffdef738bae · fixed in ef4c38d30b3744e89eb5048218904bb629ea8d47; From 4aeec3984ddc853f7c65903bde472ffdef738bae · fixed in 9e0a3f642e607848669235f5069f35640abbfc88; From 4aeec3984ddc853f7c65903bde472ffdef738bae · fixed in 42d758a09d2c46c42357ecde9a5492f015bde2e5; From 4aeec3984ddc853f7c65903bde472ffdef738bae · fixed in 52adb2dff7ce3d8430e2bdc5988b618a430def85; From 4aeec3984ddc853f7c65903bde472ffdef738bae · fixed in 278a5659c391fe5afe5f9ce1bad1fd24e90144f1; From 4aeec3984ddc853f7c65903bde472ffdef738bae · fixed in daedde7f024ecf88bc8e832ed40cf2c795f0796a; From 5.10.37 · fixed in 5.10.261; From 5.11.21 · fixed in 5.12; From 5.12.4 · fixed in 5.13

  • Linux Linux

    5.13

  • KernelLinux

    fixed in 5.10.261; From 5.11.0 · fixed in 5.15.212; From 5.13.0 · fixed in 6.1.178; From 5.16.0 · fixed in 6.6.145; From 6.2.0 · fixed in 6.12.96; From 6.7.0 · fixed in 6.18.39; From 6.13.0 · fixed in 7.1.4

References 8

git.kernel.org