CVE-2023-52617: Debian Linux

Medium severity, CVSS 4.4. EPSS: 0.2% chance of exploitation in the next 30 days.

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 products

• Debian Debian Linux: version 10.0 only
• Linux Linux Kernel: before 5.4.269 (fixed in 5.4.269); from 5.5, before 5.10.210 (fixed in 5.10.210); from 5.11, before 5.15.149 (fixed in 5.15.149); from 5.16, before 6.1.77 (fixed in 6.1.77); from 6.2, before 6.6.16 (fixed in 6.6.16); from 6.7, before 6.7.4 (fixed in 6.7.4)

Published 2024-03-18. Last modified 2026-06-17.