CVE-2026-80842

A flaw was found in the Linux kernel's bridge multicast mcast component. A race condition in the handling of a master VLAN's multicast context during teardown can allow a network attacker to trigger a use-after-free vulnerability. This could lead to system instability or a denial of service DoS...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: net: bridge: Fixed a soft lockup issue in brmulticastqueryexpired. When setting multicastqueryinterval to a large value, the local variable time in brmulticastsendquery may overflow. If the time is less than a few milliseconds, t...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: Net: Bridge: mcast: Wait for previous GC cycles when removing a port The syzbot encountered a use-after-free issue1. This issue occurs because the bridge does not ensure that all previous garbage collection cycles are completed...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: Bridge: mcast: Fixed a use-after-free during router port configuration. The bridge maintains a global list of ports behind which a multicast router resides. This list is consulted during forwarding to ensure that multicast packet...

SUSE CVE-2026-80842

In the Linux kernel, the following vulnerability has been resolved: net: bridge: mcast: fix use-after-free of a master VLAN's multicast context brmulticasttoggleonevlan clears BRVLFLAGMCASTENABLED under br-multicastlock before stopping a VLAN's multicast context. That is the teardown handshake:...

AZL-99528 CVE-2026-80842 affecting package kernel for versions less than 6.6.157.1-1

In the Linux kernel, the following vulnerability has been resolved: net: bridge: mcast: fix use-after-free of a master VLAN's multicast context brmulticasttoggleonevlan clears BRVLFLAGMCASTENABLED under br-multicastlock before stopping a VLAN's multicast context. That is the teardown handshake:...

CVE-2026-80842

In the Linux kernel, the following vulnerability has been resolved: net: bridge: mcast: fix use-after-free of a master VLAN's multicast context brmulticasttoggleonevlan clears BRVLFLAGMCASTENABLED under br-multicastlock before stopping a VLAN's multicast context. That is the teardown handshake:...

CVE-2026-80842

In the Linux kernel, the following vulnerability has been resolved: net: bridge: mcast: fix use-after-free of a master VLAN's multicast context brmulticasttoggleonevlan clears BRVLFLAGMCASTENABLED under br-multicastlock before stopping a VLAN's multicast context. That is the teardown handshake:...

CVE-2026-80842 net: bridge: mcast: fix use-after-free of a master VLAN's multicast context

In the Linux kernel, the following vulnerability has been resolved: net: bridge: mcast: fix use-after-free of a master VLAN's multicast context brmulticasttoggleonevlan clears BRVLFLAGMCASTENABLED under br-multicastlock before stopping a VLAN's multicast context. That is the teardown handshake:...

EUVD-2026-71292

In the Linux kernel, the following vulnerability has been resolved: net: bridge: mcast: fix use-after-free of a master VLAN's multicast context brmulticasttoggleonevlan clears BRVLFLAGMCASTENABLED under br-multicastlock before stopping a VLAN's multicast context. That is the teardown handshake:...

CVE-2026-80842 net: bridge: mcast: fix use-after-free of a master VLAN's multicast context

In the Linux kernel, the following vulnerability has been resolved: net: bridge: mcast: fix use-after-free of a master VLAN's multicast context brmulticasttoggleonevlan clears BRVLFLAGMCASTENABLED under br-multicastlock before stopping a VLAN's multicast context. That is the teardown handshake:...

CVE-2026-80842

CVE-2026-80842 is a use-after-free in the Linux kernel bridge multicast subsystem, affecting master VLANs . When a master VLAN is deleted, br_multicast_toggle_one_vlan() returns early on the br_vlan_is_brentry() check without clearing BR_VLFLAG_MCAST_ENABLED under br->multicast_lock. The VLAN ...

PT-2026-85720

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A use-after-free issue exists in the bridge multicast component of the Linux kernel. The problem occurs during the teardown of a master VLAN's multicast context. Specifically, the br...

Linux Distros Unpatched Vulnerability : CVE-2026-80842

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - net: bridge: mcast: fix use-after-free of a master VLAN's multicast context brmulticasttoggleonevlan clears BRVLFLAGMCASTENABLED under br-multicastlock before...

AZL-96423 CVE-2026-74480 affecting package kernel for versions less than 6.6.152.1-1

In the Linux kernel, the following vulnerability has been resolved: net: bridge: stop fast-leave after deleting a port group brmulticastleavegroup iterates mp-ports with pp = &p-next in its fast-leave path. After brmulticastdelpg removes p, continuing the loop advances pp through the deleted entr...

CVE-2026-64032

A flaw was found in the Linux kernel's bridge multicast functionality. Improper management of multicast contexts when a bridge port is removed can lead to a use-after-free vulnerability. This issue could allow a local attacker to cause a system crash, resulting in a denial of service...

SUSE CVE-2026-64032

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...

CVE-2026-64032

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-2026-45605

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...

PT-2026-61349

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A use-after-free issue exists in the bridge component when removing a bridge port. This occurs when both per-port and per-port, VLAN multicast contexts are enabled on a single bridge por...