GHSA-3899-R8V9-5W9H
Vulnerability from github – Published: 2026-10-06 09:31 – Updated: 2026-10-06 09:31In the Linux kernel, the following vulnerability has been resolved:
mmc: mxcmmc: cancel data work and watchdog on remove
mxcmci_remove() frees the host through the devm tail, but neither it nor mmc_remove_host() drains the driver's own asynchronous state. host->watchdog, a 10 s timer armed on the DMA path in mxcmci_setup_data(), is deleted only by the DMA- and IRQ-complete paths, which the remove path does not explicitly drain; it can therefore fire after the host is freed and dereference it in mxcmci_watchdog(). host->datawork, armed from the IRQ handler on the PIO path, is not cancelled by the remove path either.
Free the devm-registered IRQ, then cancel datawork and delete the watchdog in mxcmci_remove(), before dma_release_channel(). Freeing the IRQ first keeps a trailing handler from re-arming datawork between the cancel and the host free. Both callbacks are non-self-rearming.
This issue was found by an in-house static analysis tool.
{
"affected": [],
"aliases": [
"CVE-2026-98210"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-06T09:18:07Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: mxcmmc: cancel data work and watchdog on remove\n\nmxcmci_remove() frees the host through the devm tail, but neither it nor\nmmc_remove_host() drains the driver\u0027s own asynchronous state.\nhost-\u003ewatchdog, a 10 s timer armed on the DMA path in mxcmci_setup_data(),\nis deleted only by the DMA- and IRQ-complete paths, which the remove path\ndoes not explicitly drain; it can therefore fire after the host is freed\nand dereference it in mxcmci_watchdog(). host-\u003edatawork, armed from the\nIRQ handler on the PIO path, is not cancelled by the remove path either.\n\nFree the devm-registered IRQ, then cancel datawork and delete the watchdog\nin mxcmci_remove(), before dma_release_channel(). Freeing the IRQ first\nkeeps a trailing handler from re-arming datawork between the cancel and\nthe host free. Both callbacks are non-self-rearming.\n\nThis issue was found by an in-house static analysis tool.",
"id": "GHSA-3899-r8v9-5w9h",
"modified": "2026-10-06T09:31:30Z",
"published": "2026-10-06T09:31:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98210"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/23383e0578b58ba2dc0730cf9f7806bd66bf859a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/314966b490323bdcfd3162a1398b00e587e0ced4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/740f595f8ad678cb4d79f13edd12851df2492bdd"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a1ff367e0dc961d73707add508a95df5c3509bd1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ae10838a7cdf0e54caa9d0a4f488704fd04e7f01"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d3641afe6ee76d852834a34ef0669eefced32752"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d3a421c82412344022982d5b91ba23194a0a6f29"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e2948c4232209e87c861a680f20f1e3cf8a57fec"
}
],
"schema_version": "1.4.0",
"severity": []
}
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