CVE-2026-90215mtd: ubi: Release device reference on busy detach
- —Not scoredno CVSS score yet
- 0.17%Exploitation in 30 daysEPSS · top 94% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 32 days later
· 32 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.17% · top 94% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 7e84c961b2eb062d2f47037dcca52dcd1d3615b5 – < 87812858c4c8df979cb70bcd0040b925a543df6f
- affected 7e84c961b2eb062d2f47037dcca52dcd1d3615b5 – < e065960366b55ab21e6c643c30dec2a41451900b
- affected 7e84c961b2eb062d2f47037dcca52dcd1d3615b5 – < 851c5e9a829d56cb0982965f07ef8966a6722884
- affected 7e84c961b2eb062d2f47037dcca52dcd1d3615b5 – < 31dd710cd84d5dd63c49f640d3a9f36c9699ca95
- affected 6.9
- unaffected < 6.9
- unaffected 6.12.110 – ≤ 6.12.*
- unaffected 6.18.52 – ≤ 6.18.*
- unaffected 7.2.6 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References4
- https://git.kernel.org/stable/c/87812858c4c8df979cb70bcd0040b925a543df6f (opens in a new tab)
- https://git.kernel.org/stable/c/e065960366b55ab21e6c643c30dec2a41451900b (opens in a new tab)
- https://git.kernel.org/stable/c/851c5e9a829d56cb0982965f07ef8966a6722884 (opens in a new tab)
- https://git.kernel.org/stable/c/31dd710cd84d5dd63c49f640d3a9f36c9699ca95 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-81808 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-90215)Record last updated .