CVE-2026-23001
Full vulnerability record from the local CVENow database.
Description
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/[email protected]/T/#u
Severity
HIGH
CVSS score
7.8
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-01-25 15:15:54.970000
Last modified
2026-10-19 19:17:31.743000
View original CVE JSON
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-01-25T15:15:54.970",
"lastModified": "2026-10-19T19:17:31.743",
"vulnStatus": "Modified",
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmacvlan: fix possible UAF in macvlan_forward_source()\n\nAdd RCU protection on (struct macvlan_source_entry)->vlan.\n\nWhenever macvlan_hash_del_source() is called, we must clear\nentry->vlan pointer before RCU grace period starts.\n\nThis allows macvlan_forward_source() to skip over\nentries queued for freeing.\n\nNote that macvlan_dev are already RCU protected, as they\nare embedded in a standard netdev (netdev_priv(ndev)).\n\nhttps: //lore.kernel.org/netdev/[email protected]/T/#u"
},
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"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmacvlan: soluciona posible UAF en macvlan_forward_source()\n\nAñade protección RCU en (struct macvlan_source_entry)->vlan.\n\nSiempre que se llama a macvlan_hash_del_source(), debemos borrar el puntero entry->vlan antes de que comience el período de gracia de RCU.\n\nEsto permite a macvlan_forward_source() omitir entradas en cola para ser liberadas.\n\nTenga en cuenta que macvlan_dev ya están protegidos por RCU, ya que están incrustados en un netdev estándar (netdev_priv(ndev)).\n\nhttps: //lore.kernel.org/netdev/[email protected]/T/#u"
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