ubi: Fix rollback for explicit UBI device numbers
Key facts
- Attack vector
- —
- Privileges required
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- User interaction
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- Attack complexity
- —
- Impact type
- —
- Confidentiality · integrity · availability
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- Fix status
- Partial Red Hat: 6 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6, 7.3
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet: Fix deferred |
Not affected: 1 product
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2026-90216
- 2026-10-03 Alias added: GHSA-98x6-774g-8659
- 2026-10-13 Affected versions changed · Red Hat
- 2026-10-13 CVSS score added · Red Hat
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-11-07 Affected versions changed · Red Hat
References
Other 8
- https://git.kernel.org/stable/c/83c978921688af40dcab6db74882d1ff9b0b765c
- https://git.kernel.org/stable/c/6b92e66ec6dd8019e8efb2a568ef7c967c5a18c5
- https://git.kernel.org/stable/c/4417ab6ecad01cf2d01045ef8104c95a66b0e893
- https://git.kernel.org/stable/c/552e565ed8846e7db143e4a6bdf3f5677453c686
- https://git.kernel.org/stable/c/9754f049d5f1945d4c691d1f52824eb8daf8f9be
- https://git.kernel.org/stable/c/e3f7e58189bc222971ddc860f1716f37e51ba996
- https://git.kernel.org/stable/c/87b3da4acb860605643ebee312178f13b20744cf
- https://git.kernel.org/stable/c/5b0a6b554e12a97f9771a9a9f4ea1f5457373c73
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Sources
- CVE-2026-90216 · CVE Program
- CVE-2026-90216 · NVD
- FIRST EPSS
- GHSA-98x6-774g-8659 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-90216 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences