NetSight
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high7.8

CVE-2026-23001

In the Linux kernel, the following vulnerability has been resolved: macvlan: fix possible UAF in macvlan_forward_source() Add RCU protection on (struct macvlan…

Impact

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

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 3.18.1 before 5.10.249
from 5.11 before 5.15.199
from 5.16 before 6.1.162
from 6.2 before 6.6.122
from 6.7 before 6.12.67
from 6.13 before 6.18.7

Weakness classification

CWE-416

References