CVE-2023-52617

Summary

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

PCI: switchtec: Fix stdev_release() crash after surprise hot remove

A PCI device hot removal may occur while stdev->cdev is held open. The call to stdev_release() then happens during close or exit, at a point way past switchtec_pci_remove(). Otherwise the last ref would vanish with the trailing put_device(), just before return.

At that later point in time, the devm cleanup has already removed the stdev->mmio_mrpc mapping. Also, the stdev->pdev reference was not a counted one. Therefore, in DMA mode, the iowrite32() in stdev_release() will cause a fatal page fault, and the subsequent dma_free_coherent(), if reached, would pass a stale &stdev->pdev->dev pointer.

Fix by moving MRPC DMA shutdown into switchtec_pci_remove(), after stdev_kill(). Counting the stdev->pdev ref is now optional, but may prevent future accidents.

Reproducible via the script at https://lore.kernel.org/r/20231113212150.96410-1-dns@arista.com

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxf7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 < d8c293549946ee5078ed0ab77793cec365559355affected
LinuxLinuxf7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 < 4a5d0528cf19dbf060313dffbe047bc11c90c24caffected
LinuxLinuxf7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 < ff1c7e2fb9e9c3f53715fbe04d3ac47b80be7eb8affected
LinuxLinuxf7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 < 1d83c85922647758c1f1e4806a4c5c3cf591a20aaffected
LinuxLinuxf7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 < 0233b836312e39a3c763fb53512b3fa455b473b3affected
LinuxLinuxf7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 < e129c7fa7070fbce57feb0bfc5eaa65eef44b693affected
LinuxLinuxf7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 < df25461119d987b8c81d232cfe4411e91dcabe66affected
LinuxLinux5.0affected
LinuxLinux0 < 5.0unaffected
LinuxLinux5.4.269 <= 5.4.*unaffected
LinuxLinux5.10.210 <= 5.10.*unaffected
LinuxLinux5.15.149 <= 5.15.*unaffected
LinuxLinux6.1.77 <= 6.1.*unaffected
LinuxLinux6.6.16 <= 6.6.*unaffected
LinuxLinux6.7.4 <= 6.7.*unaffected
LinuxLinux6.8 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References