CVE-2026-90216

ubi: Fix rollback for explicit UBI device numbers

State: Published
Severity: Not scored
Published: Sep 17, 2026
Updated: Oct 19, 2026
Reserved: Sep 11, 2026

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	83ff59a066637a6c28844bbf43009459408240f4 to before 83c978921688af40dcab6db74882d1ff9b0b765cAffected 83ff59a066637a6c28844bbf43009459408240f4 to before 6b92e66ec6dd8019e8efb2a568ef7c967c5a18c5Affected 83ff59a066637a6c28844bbf43009459408240f4 to before 4417ab6ecad01cf2d01045ef8104c95a66b0e893Affected 83ff59a066637a6c28844bbf43009459408240f4 to before 552e565ed8846e7db143e4a6bdf3f5677453c686Affected 83ff59a066637a6c28844bbf43009459408240f4 to before 9754f049d5f1945d4c691d1f52824eb8daf8f9beAffected 83ff59a066637a6c28844bbf43009459408240f4 to before e3f7e58189bc222971ddc860f1716f37e51ba996Affected 83ff59a066637a6c28844bbf43009459408240f4 to before 87b3da4acb860605643ebee312178f13b20744cfAffected 83ff59a066637a6c28844bbf43009459408240f4 to before 5b0a6b554e12a97f9771a9a9f4ea1f5457373c73Affected
LinuxLinux	3.11Affected before 3.11Not affected 5.10.270 through 5.10.Not affected 5.15.221 through 5.15.Not affected 6.1.188 through 6.1.Not affected 6.6.157 through 6.6.Not affected 6.12.110 through 6.12.Not affected 6.18.52 through 6.18.Not affected 7.2.6 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

83ff59a066637a6c28844bbf43009459408240f4 to before 83c978921688af40dcab6db74882d1ff9b0b765cAffected
83ff59a066637a6c28844bbf43009459408240f4 to before 6b92e66ec6dd8019e8efb2a568ef7c967c5a18c5Affected
83ff59a066637a6c28844bbf43009459408240f4 to before 4417ab6ecad01cf2d01045ef8104c95a66b0e893Affected
83ff59a066637a6c28844bbf43009459408240f4 to before 552e565ed8846e7db143e4a6bdf3f5677453c686Affected
83ff59a066637a6c28844bbf43009459408240f4 to before 9754f049d5f1945d4c691d1f52824eb8daf8f9beAffected
83ff59a066637a6c28844bbf43009459408240f4 to before e3f7e58189bc222971ddc860f1716f37e51ba996Affected
83ff59a066637a6c28844bbf43009459408240f4 to before 87b3da4acb860605643ebee312178f13b20744cfAffected
83ff59a066637a6c28844bbf43009459408240f4 to before 5b0a6b554e12a97f9771a9a9f4ea1f5457373c73Affected

LinuxLinux

3.11Affected
before 3.11Not affected
5.10.270 through 5.10.*Not affected
5.15.221 through 5.15.*Not affected
6.1.188 through 6.1.*Not affected
6.6.157 through 6.6.*Not affected
6.12.110 through 6.12.*Not affected
6.18.52 through 6.18.*Not affected
7.2.6 through 7.2.*Not affected
7.3 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.