macvlan: fix possible UAF in macvlan_forward_source()
In the Linux kernel, the following vulnerability has been resolved: macvlan: fix possible UAF in macvlan_forward_source() Add RCU protection on (struct macvlan_source_entry)->vlan. Whenever macvlan_hash_del_source() is called, we must clear entry->vlan pointer before RCU grace period starts. This allows macvlan_forward_source() to skip over entries queued for freeing. Note that macvlan_dev are already RCU protected, as they are embedded in a standard netdev (netdev_priv(ndev)). https: //lore.kernel.org/netdev/695fb1e8.050a0220.1c677c.039f.GAE@google.com/T/#u
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.249, 5.15.199, 6.1.162, 6.12.67, 6.18.7, 6.6.122
- CVEs
- CVE-2026-23001
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 5 Nov 2026, 04:08 UTC · Revision 1
Source evidence
macvlan: fix possible UAF in macvlan_forward_source()
core-osv · Original sourcePublished 25 Jan 2026, 14:36 UTC
In the Linux kernel, the following vulnerability has been resolved: macvlan: fix possible UAF in macvlan_forward_source() Add RCU protection on (struct macvlan_source_entry)->vlan. Whenever macvlan_hash_del_source() is called, we must clear entry->vlan pointer before RCU grace period starts. This allows macvlan_forward_source() to skip over entries queued for freeing. Note that macvlan_dev are already RCU protected, as they are embedded in a standard netdev (netdev_priv(ndev)). https: //lore.kernel.org/netdev/695fb1e8.050a0220.1c677c.039f.GAE@google.com/T/#u
osv:CVE-2026-23001
Kernel
Fixed versions: 5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.67, 6.18.7
Complete source record
{
"id": "ee2378cece88fced24ee435371275dcdf924be4c7eafbd2f5fef20f53c44179a",
"url": "https://osv.dev/vulnerability/CVE-2026-23001",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "macvlan: fix possible UAF in macvlan_forward_source()",
"summary": "In the Linux kernel, the following vulnerability has been resolved: macvlan: fix possible UAF in macvlan_forward_source() Add RCU protection on (struct macvlan_source_entry)->vlan. Whenever macvlan_hash_del_source() is called, we must clear entry->vlan pointer before RCU grace period starts. This allows macvlan_forward_source() to skip over entries queued for freeing. Note that macvlan_dev are already RCU protected, as they are embedded in a standard netdev (netdev_priv(ndev)). https: //lore.kernel.org/netdev/695fb1e8.050a0220.1c677c.039f.GAE@google.com/T/#u",
"evidence": "osv:CVE-2026-23001",
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"evidence": "/affected/1/ranges"
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"evidence": "/affected/1/ranges"
},
{
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"aliases": [
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"metrics": [
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"package": {
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"database_specific": {
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],
"modified": "2026-10-28T02:30:42.322904332Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/15f6faf36e162532bec5cc05eb3fc622108bf2ed",
"https://git.kernel.org/stable/c/232afc74a6dde0fe1830988e5827921f5ec9bb3f",
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"https://git.kernel.org/stable/c/6dbead9c7677186f22b7981dd085a0feec1f038e",
"https://git.kernel.org/stable/c/7470a7a63dc162f07c26dbf960e41ee1e248d80e",
"https://git.kernel.org/stable/c/8133e85b8a3ec9f10d861e0002ec6037256e987e",
"https://git.kernel.org/stable/c/8518712a2ca952d6da2238c6f0a16b4ae5ea3f13",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23001.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-23001",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
],
"provider_metadata": {
"cna_assigner": "Linux",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23001.json"
}
},
"related_cves": [
{
"value": "CVE-2026-23001",
"evidence": "/id"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 510145,
"published_at": "2026-01-25T14:36:15.79+00:00"
}