Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: In the net: bridge section, for the mcast function, it was decided to always update the mdbnEntries value for VLAN contexts. The syzbot triggered a warning1 regarding the number of mdb entries in a context. It turns out that ther...

CVE-2026-64032

The CVE-2026-64032 entry documents a Linux kernel use-after-free in bridge multicast snooping when removing a bridge port. The issue occurs when both per-port and per-{port, VLAN} multicast contexts become enabled on a single bridge port due to interactions between per-VLAN multicast snooping and...

EUVD-2026-45605

In the Linux kernel, the following vulnerability has been resolved: bridge: mcast: Fix a possible use-after-free when removing a bridge port When per-VLAN multicast snooping is enabled, the bridge iterates over all the bridge ports, disables the per-port multicast context on each port and enables...

EUVD-2026-32379

In the Linux kernel, the following vulnerability has been resolved: net: bridge: mcast: always update mdbnentries for vlan contexts syzbot triggered a warning1 about the number of mdb entries in a context. It turned out that there are multiple ways to trigger that warning today some got added...

UBUNTU-CVE-2026-45913

In the Linux kernel, the following vulnerability has been resolved: net: bridge: mcast: always update mdbnentries for vlan contexts syzbot triggered a warning1 about the number of mdb entries in a context. It turned out that there are multiple ways to trigger that warning today some got added...

CVE-2026-45913

CVE-2026-45913 concerns the Linux kernel bridge multicast code where mdb_n_entries for VLAN contexts could be inconsistently updated, triggering kernel warnings. The fix standardizes counting by removing conditional increases and ensuring the counter is initialized on port-vlan context creation a...

CVE-2026-45913 net: bridge: mcast: always update mdb_n_entries for vlan contexts

In the Linux kernel, the following vulnerability has been resolved: net: bridge: mcast: always update mdbnentries for vlan contexts syzbot triggered a warning1 about the number of mdb entries in a context. It turned out that there are multiple ways to trigger that warning today some got added...