CVE-2026-31650
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: mmc: vub300: fix use-after-free on disconnect The vub300 driver maintains an explicit reference count for the controller and its driver data and the last reference can in theory be dropped after the driver has been unbound. This specifically means that the controller allocation must not be device managed as that can lead to use-after-free. Note that the lifetime is currently also incorrectly tied the parent USB device rather than interface, which can lead to memory leaks if the driver is unbound without its device being physically disconnected (e.g. on probe deferral). Fix both issues by reverting to non-managed allocation of the controller.
Severity
HIGH
CVSS score
7.8
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-04-24 15:16:44.473000
Last modified
2026-10-21 13:18:40.907000
View original CVE JSON
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-04-24T15:16:44.473",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: vub300: fix use-after-free on disconnect\n\nThe vub300 driver maintains an explicit reference count for the\ncontroller and its driver data and the last reference can in theory be\ndropped after the driver has been unbound.\n\nThis specifically means that the controller allocation must not be\ndevice managed as that can lead to use-after-free.\n\nNote that the lifetime is currently also incorrectly tied the parent USB\ndevice rather than interface, which can lead to memory leaks if the\ndriver is unbound without its device being physically disconnected (e.g.\non probe deferral).\n\nFix both issues by reverting to non-managed allocation of the controller."
}
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