CVE-2026-90215

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux7e84c961b2eb062d2f47037dcca52dcd1d3615b5 < 87812858c4c8df979cb70bcd0040b925a543df6faffected
LinuxLinux7e84c961b2eb062d2f47037dcca52dcd1d3615b5 < e065960366b55ab21e6c643c30dec2a41451900baffected
LinuxLinux7e84c961b2eb062d2f47037dcca52dcd1d3615b5 < 851c5e9a829d56cb0982965f07ef8966a6722884affected
LinuxLinux7e84c961b2eb062d2f47037dcca52dcd1d3615b5 < 31dd710cd84d5dd63c49f640d3a9f36c9699ca95affected
LinuxLinux6.9affected
LinuxLinux0 < 6.9unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References