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CVE-2023-52617PCI: switchtec: Fix stdev_release() crash after surprise hot remove

Description

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/[email protected]

Timeline

  1. ID reserved

    By Linux

  2. · 12 days later

    Published

  3. · 2 years later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2023-52617, by who scored it
Scored byCVSSScoreVector
CISA-ADPADP (enrichment)3.1Medium4.4CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
NVDNVD · Analyzed3.1Medium4.4CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.24% · top 85% of all CVEs (13 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.4.

Affected products

  • Linux · Linux

    • affected f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 – < d8c293549946ee5078ed0ab77793cec365559355
    • affected f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 – < 4a5d0528cf19dbf060313dffbe047bc11c90c24c
    • affected f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 – < ff1c7e2fb9e9c3f53715fbe04d3ac47b80be7eb8
    • affected f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 – < 1d83c85922647758c1f1e4806a4c5c3cf591a20a
    • affected f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 – < 0233b836312e39a3c763fb53512b3fa455b473b3
    • affected f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 – < e129c7fa7070fbce57feb0bfc5eaa65eef44b693
    • affected f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 – < df25461119d987b8c81d232cfe4411e91dcabe66

  • Linux · Linux

    • affected 5.0
    • unaffected < 5.0
    • unaffected 5.4.269 – ≤ 5.4.*
    • unaffected 5.10.210 – ≤ 5.10.*
    • unaffected 5.15.149 – ≤ 5.15.*
    • unaffected 6.1.77 – ≤ 6.1.*
    • unaffected 6.6.16 – ≤ 6.6.*
    • unaffected 6.7.4 – ≤ 6.7.*
    • unaffected 6.8 – ≤ *

References

References8

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .