CVE-2023-52617
Status: AnalyzedMedium (4.4)—
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.
Read full descriptionShow less
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
CVSS
- Version: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
- Base score: 4.4
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 0.24%
- Percentile among all scored CVEs: 13
- Score date: 10/8/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (2)
CWEs
- CWE-459
References
- https://git.kernel.org/stable/c/0233b836312e39a3c763fb53512b3fa455b473b3
- https://git.kernel.org/stable/c/1d83c85922647758c1f1e4806a4c5c3cf591a20a
- https://git.kernel.org/stable/c/4a5d0528cf19dbf060313dffbe047bc11c90c24c
- https://git.kernel.org/stable/c/d8c293549946ee5078ed0ab77793cec365559355
- https://git.kernel.org/stable/c/df25461119d987b8c81d232cfe4411e91dcabe66
- https://git.kernel.org/stable/c/e129c7fa7070fbce57feb0bfc5eaa65eef44b693
- https://git.kernel.org/stable/c/ff1c7e2fb9e9c3f53715fbe04d3ac47b80be7eb8
- https://git.kernel.org/stable/c/0233b836312e39a3c763fb53512b3fa455b473b3
- https://git.kernel.org/stable/c/1d83c85922647758c1f1e4806a4c5c3cf591a20a
- https://git.kernel.org/stable/c/4a5d0528cf19dbf060313dffbe047bc11c90c24c
- https://git.kernel.org/stable/c/d8c293549946ee5078ed0ab77793cec365559355
- https://git.kernel.org/stable/c/df25461119d987b8c81d232cfe4411e91dcabe66
- https://git.kernel.org/stable/c/e129c7fa7070fbce57feb0bfc5eaa65eef44b693
- https://git.kernel.org/stable/c/ff1c7e2fb9e9c3f53715fbe04d3ac47b80be7eb8
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
Raw JSON (NVD)
Show
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: switchtec: Fix stdev_release() crash after surprise hot remove\n\nA PCI device hot removal may occur while stdev->cdev is held open. The call\nto stdev_release() then happens during close or exit, at a point way past\nswitchtec_pci_remove(). Otherwise the last ref would vanish with the\ntrailing put_device(), just before return.\n\nAt that later point in time, the devm cleanup has already removed the\nstdev->mmio_mrpc mapping. Also, the stdev->pdev reference was not a counted\none. Therefore, in DMA mode, the iowrite32() in stdev_release() will cause\na fatal page fault, and the subsequent dma_free_coherent(), if reached,\nwould pass a stale &stdev->pdev->dev pointer.\n\nFix by moving MRPC DMA shutdown into switchtec_pci_remove(), after\nstdev_kill(). Counting the stdev->pdev ref is now optional, but may prevent\nfuture accidents.\n\nReproducible via the script at\nhttps://lore.kernel.org/r/20231113212150.96410-1-dns@arista.com"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: PCI: switchtec: corrige el bloqueo de stdev_release() después de una eliminación sorpresa en caliente. Puede ocurrir una eliminación en caliente del dispositivo PCI mientras stdev->cdev se mantiene abierto. La llamada a stdev_release() ocurre durante el cierre o la salida, en un punto mucho más allá de switchtec_pci_remove(). De lo contrario, la última referencia desaparecería con el put_device() final, justo antes del retorno. En ese momento posterior, la limpieza devm ya eliminó la asignación stdev->mmio_mrpc. Además, la referencia stdev->pdev no se contaba. Por lo tanto, en modo DMA, iowrite32() en stdev_release() causará un error de página fatal, y el dma_free_coherent() posterior, si se alcanza, pasaría un puntero &stdev->pdev->dev obsoleto. Para solucionarlo, mueva el apagado de MRPC DMA a switchtec_pci_remove(), después de stdev_kill(). Contar stdev->pdev ref ahora es opcional, pero puede evitar accidentes futuros. Reproducible a través del script en https://lore.kernel.org/r/20231113212150.96410-1-dns@arista.com"
}
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