mtd: ubi: Release device reference on busy detach
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.
CVE-2026-90215
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-90215
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7e84c961b2eb062d2f47037dcca52dcd1d3615b5",
"lessThan": "87812858c4c8df979cb70bcd0040b925a543df6f",
"versionType": "git"
},
{
"status": "affected",
"version": "7e84c961b2eb062d2f47037dcca52dcd1d3615b5",
"lessThan": "e065960366b55ab21e6c643c30dec2a41451900b",
"versionType": "git"
},
{
"status": "affected",
"version": "7e84c961b2eb062d2f47037dcca52dcd1d3615b5",
"lessThan": "851c5e9a829d56cb0982965f07ef8966a6722884",
"versionType": "git"
},
{
"status": "affected",
"version": "7e84c961b2eb062d2f47037dcca52dcd1d3615b5",
"lessThan": "31dd710cd84d5dd63c49f640d3a9f36c9699ca95",
"versionType": "git"
}
],
"programFiles": [
"drivers/mtd/ubi/build.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.9"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.9",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/mtd/ubi/build.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90215
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36588 · Revision 1
- Added to Heist Feed
- Publisher date