of/overlay: only treat a positive changeset id as registered
In the Linux kernel, the following vulnerability has been resolved: of/overlay: only treat a positive changeset id as registered of_overlay_fdt_apply() stores the idr_alloc() return value in ovcs->id before checking it. On failure the stored id is negative, free_overlay_changeset()'s "if (ovcs->id)" check passes, idr_remove() is called with a negative id and list_del() runs on ovcs->ovcs_list, which is not initialized until after the id allocation. An allocation failure at that point dereferences NULL. Make free_overlay_changeset() treat only a strict-positive id as registered. The rest of the function already copes with a partially-initialized ovcs, so the error path stays a plain goto err_free_ovcs.
CVE-2026-98854
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-2026-98854
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": "cc688475c56d34a2b584141f9544cbe23360080d",
"versionType": "git"
},
{
"status": "affected",
"version": "61b4de4e0b384f4a22c55c3bada604da49cec4e1",
"lessThan": "c08a54df9d33dcd6ff089adc9434b2c008af3a39",
"versionType": "git"
},
{
"status": "affected",
"version": "61b4de4e0b384f4a22c55c3bada604da49cec4e1",
"lessThan": "0d1525fdcd3355672b7485d61e55df6824ab5ad1",
"versionType": "git"
},
{
"status": "affected",
"version": "61b4de4e0b384f4a22c55c3bada604da49cec4e1",
"lessThan": "c875407c34dadaef0599834ad9c815f4c9f50d15",
"versionType": "git"
},
{
"status": "affected",
"version": "61b4de4e0b384f4a22c55c3bada604da49cec4e1",
"lessThan": "44081d708b5b885487bac792db78324b7b4c267d",
"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-2026-98854
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #49008 · Revision 1
- Added to Heist Feed
- Publisher date