CVE-2023-52617 (GCVE-0-2023-52617)

Vulnerability from cvelistv5 – Published: 2024-03-18 10:19 – Updated: 2026-05-11 19:30
VLAI
Title
PCI: switchtec: Fix stdev_release() crash after surprise hot remove
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
Severity
4.4 (Medium)
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-10 20:25 UTC
CWE
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6667 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 , < d8c293549946ee5078ed0ab77793cec365559355 (git)
Affected: f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 , < 4a5d0528cf19dbf060313dffbe047bc11c90c24c (git)
Affected: f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 , < ff1c7e2fb9e9c3f53715fbe04d3ac47b80be7eb8 (git)
Affected: f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 , < 1d83c85922647758c1f1e4806a4c5c3cf591a20a (git)
Affected: f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 , < 0233b836312e39a3c763fb53512b3fa455b473b3 (git)
Affected: f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 , < e129c7fa7070fbce57feb0bfc5eaa65eef44b693 (git)
Affected: f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 , < df25461119d987b8c81d232cfe4411e91dcabe66 (git)
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Linux Linux Affected: 5.0
Unaffected: 0 , < 5.0 (semver)
Unaffected: 5.4.269 , ≤ 5.4.* (semver)
Unaffected: 5.10.210 , ≤ 5.10.* (semver)
Unaffected: 5.15.149 , ≤ 5.15.* (semver)
Unaffected: 6.1.77 , ≤ 6.1.* (semver)
Unaffected: 6.6.16 , ≤ 6.6.* (semver)
Unaffected: 6.7.4 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: PCI: switchtec: corrige el bloqueo de stdev_release() despu\u00e9s de una eliminaci\u00f3n sorpresa en caliente. Puede ocurrir una eliminaci\u00f3n en caliente del dispositivo PCI mientras stdev-\u0026gt;cdev se mantiene abierto. La llamada a stdev_release() ocurre durante el cierre o la salida, en un punto mucho m\u00e1s all\u00e1 de switchtec_pci_remove(). De lo contrario, la \u00faltima referencia desaparecer\u00eda con el put_device() final, justo antes del retorno. En ese momento posterior, la limpieza devm ya elimin\u00f3 la asignaci\u00f3n stdev-\u0026gt;mmio_mrpc. Adem\u00e1s, la referencia stdev-\u0026gt;pdev no se contaba. Por lo tanto, en modo DMA, iowrite32() en stdev_release() causar\u00e1 un error de p\u00e1gina fatal, y el dma_free_coherent() posterior, si se alcanza, pasar\u00eda un puntero \u0026amp;stdev-\u0026gt;pdev-\u0026gt;dev obsoleto. Para solucionarlo, mueva el apagado de MRPC DMA a switchtec_pci_remove(), despu\u00e9s de stdev_kill(). Contar stdev-\u0026gt;pdev ref ahora es opcional, pero puede evitar accidentes futuros. Reproducible a trav\u00e9s del script en https://lore.kernel.org/r/20231113212150.96410-1-dns@arista.com"
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}



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