mm/mm_init: handle alloc_percpu failure in free_area_init_core_hotplug
In the Linux kernel, the following vulnerability has been resolved: mm/mm_init: handle alloc_percpu failure in free_area_init_core_hotplug We miss a failed allocation check for pgdat->per_cpu_nodestats, which results in a NULL deref when we offset into the per-cpu area. Propagate -ENOMEM up the stack and leave per_cpu_nodestats pointing at boot_nodestats so a later online can retry the allocation. hotadd_init_pgdat() returns NULL on failure, which __try_online_node() already maps to -ENOMEM. On failure nothing needs to be unwound: - the node is never marked online - per_cpu_nodestats is left pointing at boot_nodestats - __add_memory_resource() cleans up pending memblock resources - later online attempts retry the per_cpu_nodestats allocation
CVE-2026-93172
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-2026-93172
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": "75ef7184053989118d3814c558a9af62e7376a58",
"lessThan": "4dda09e7ca0bf0c3fa7c5c8f134d9804b67f455c",
"versionType": "git"
},
{
"status": "affected",
"version": "75ef7184053989118d3814c558a9af62e7376a58",
"lessThan": "4cc5caef9a8d1894dfa31d84a0daa0ac1437dadc",
"versionType": "git"
},
{
"status": "affected",
"version": "75ef7184053989118d3814c558a9af62e7376a58",
"lessThan": "bc3b5e6519b8df22d622a03eab6772784da97db4",
"versionType": "git"
},
{
"status": "affected",
"version": "75ef7184053989118d3814c558a9af62e7376a58",
"lessThan": "1017fe1c7f48e511c5a680e3057005daaff2f3a2",
"versionType": "git"
},
{
"status": "affected",
"version": "75ef7184053989118d3814c558a9af62e7376a58",
"lessThan": "2ebce860bdd7ae5e13002811bc9bbbf33fcfc221",
"versionType": "git"
}
],
"programFiles": [
"include/linux/memory_hotplug.h",
"mm/memory_hotplug.c",
"mm/mm_init.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"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": [
"include/linux/memory_hotplug.h",
"mm/memory_hotplug.c",
"mm/mm_init.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-93172
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48723 · Revision 1
- Added to Heist Feed
- Publisher date