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CVE-2026-90216

ubi: Fix rollback for explicit UBI device numbers PUBLISHED

Description (CNA)

In the Linux kernel, the following vulnerability has been resolved: ubi: Fix rollback for explicit UBI device numbers ubi_init_attach() rolls back module initialization failures by scanning ubi_devices[0..i-1], where i is the mtd= parameter index. That assumes the parameter index matches the UBI device number. That assumption is not true when mtd= specifies an explicit ubi_num. A successfully attached device can be stored at a higher ubi_devices[] slot, and a later failure can miss it during rollback. Scan the full ubi_devices[] array and detach by the actual array index, matching the way UBI devices are stored.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected 83ff59a066637a6c28844bbf43009459408240f4 before 83c978921688af40dcab6db74882d1ff9b0b765c; affected 83ff59a066637a6c28844bbf43009459408240f4 before 6b92e66ec6dd8019e8efb2a568ef7c967c5a18c5; affected 83ff59a066637a6c28844bbf43009459408240f4 before 4417ab6ecad01cf2d01045ef8104c95a66b0e893; affected 83ff59a066637a6c28844bbf43009459408240f4 before 552e565ed8846e7db143e4a6bdf3f5677453c686; affected 83ff59a066637a6c28844bbf43009459408240f4 before 9754f049d5f1945d4c691d1f52824eb8daf8f9be; affected 83ff59a066637a6c28844bbf43009459408240f4 before e3f7e58189bc222971ddc860f1716f37e51ba996; affected 83ff59a066637a6c28844bbf43009459408240f4 before 87b3da4acb860605643ebee312178f13b20744cf; affected 83ff59a066637a6c28844bbf43009459408240f4 before 5b0a6b554e12a97f9771a9a9f4ea1f5457373c73
Linux / Linuxaffected 3.11; unaffected 0 before 3.11; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through *

CWE

No CWE identifiers supplied.

References