CVE-2026-90215
In the Linux kernel, the following vulnerability has been resolved: mtd: ubi: Release device reference on busy detach ubi_detach_mtd_dev() obtains a device reference through ubi_get_device() before checking whether the UBI device is busy. The busy return path drops ubi->ref_count but leaves the device reference held, so the device object cannot be released after a later detach. Drop the device reference before returning -EBUSY.
Affected versions
Linux kernel versions
6.9
and later are affected. Fixed in
6.12.110,
6.18.52,
7.2.6,
7.3-rc1
and their respective stable series.
References
4 totalFrequently asked questions
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What is CVE-2026-90215?
CVE-2026-90215 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.9 onward and has been patched in 6.12.110, 6.18.52, 7.2.6 and others. CVE-2026-90215 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-90215?
Yes. CVE-2026-90215 has been patched. Fixed versions include 6.12.110, 6.18.52, 7.2.6 and others. If you are running Linux kernel 6.9 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-90215 actively exploited?
No. CVE-2026-90215 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.