of/overlay: don't leak fragment references when changeset init fails
In the Linux kernel, the following vulnerability has been resolved: of/overlay: don't leak fragment references when changeset init fails init_overlay_changeset() stores the number of initialized fragments in ovcs->count only on full success. When find_target() or the __symbols__ lookup fails partway through, the target and overlay references taken for the fragments initialized so far are never dropped: free_overlay_changeset() bounds its cleanup loop by ovcs->count, which is still 0. Store the running count on the error path so free_overlay_changeset() puts whatever was set up. The store is guarded by ovcs->fragments because on the allocation-failure path cnt still holds the counting pass total while there is no fragments array; everywhere else cnt only counts fully-initialized fragments.
CVE-2026-98831
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-2026-98831
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": "61b4de4e0b384f4a22c55c3bada604da49cec4e1",
"lessThan": "702b5db6e7b3865be70675d57d6fd7dde80d02b6",
"versionType": "git"
},
{
"status": "affected",
"version": "61b4de4e0b384f4a22c55c3bada604da49cec4e1",
"lessThan": "894573e2fdaeb1b15030b7eebc22615edf28a6cd",
"versionType": "git"
},
{
"status": "affected",
"version": "61b4de4e0b384f4a22c55c3bada604da49cec4e1",
"lessThan": "7a46f1917b320cc8762183b802301da02a191b6a",
"versionType": "git"
},
{
"status": "affected",
"version": "61b4de4e0b384f4a22c55c3bada604da49cec4e1",
"lessThan": "3a23fb158ba517b77a2e5258263bdfdaa480f758",
"versionType": "git"
},
{
"status": "affected",
"version": "61b4de4e0b384f4a22c55c3bada604da49cec4e1",
"lessThan": "1d62f0f2bc7edb12ed09f71203df0e47fa4efca4",
"versionType": "git"
}
],
"programFiles": [
"drivers/of/overlay.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.56",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.10",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/of/overlay.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98831
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48995 · Revision 1
- Added to Heist Feed
- Publisher date