kernel: net: bridge: stop fast-leave after deleting a port group

A flaw was found in the Linux kernel's network bridge module. When handling multicast fast-leave, a vulnerability exists where the system may attempt to access a port group after it has been deleted. This can occur if multicast-to-unicast was previously enabled and then disabled, leading to a sta...

kernel: net: bridge: stop fast-leave after deleting a port group

A flaw was found in the Linux kernel's network bridge module. When handling multicast fast-leave, a vulnerability exists where the system may attempt to access a port group after it has been deleted. This can occur if multicast-to-unicast was previously enabled and then disabled, leading to a sta...

kernel: net: bridge: stop fast-leave after deleting a port group

A flaw was found in the Linux kernel's network bridge module. When handling multicast fast-leave, a vulnerability exists where the system may attempt to access a port group after it has been deleted. This can occur if multicast-to-unicast was previously enabled and then disabled, leading to a sta...

kernel: net: bridge: stop fast-leave after deleting a port group

A flaw was found in the Linux kernel's network bridge module. When handling multicast fast-leave, a vulnerability exists where the system may attempt to access a port group after it has been deleted. This can occur if multicast-to-unicast was previously enabled and then disabled, leading to a sta...

kernel: net: bridge: stop fast-leave after deleting a port group

A flaw was found in the Linux kernel's network bridge module. When handling multicast fast-leave, a vulnerability exists where the system may attempt to access a port group after it has been deleted. This can occur if multicast-to-unicast was previously enabled and then disabled, leading to a sta...

kernel: net: bridge: stop fast-leave after deleting a port group

A flaw was found in the Linux kernel's network bridge module. When handling multicast fast-leave, a vulnerability exists where the system may attempt to access a port group after it has been deleted. This can occur if multicast-to-unicast was previously enabled and then disabled, leading to a sta...

CVE-2026-74659

A flaw was found in the Linux kernel's Multiple Registration Protocol MRP bridge module. When constructing MRP test frames, the brmrpalloctestskb function fails to properly initialize certain fields. This oversight results in three uninitialized bytes being transmitted in every MRA MRPTest frame,...

CVE-2026-64537

In the Linux kernel, the following vulnerability has been resolved: bridge: cfm: reject invalid CCM interval at configuration time ccmtxworkexpired re-arms itself via queuedelayedwork using the configured expinterval converted by intervaltous. When expinterval is BRCFMCCMINTERVALNONE or out of...

CVE-2026-63988

A flaw was found in the Linux kernel's bridge module. A local user, by interacting with the sysfs path for bridge port attributes, could trigger a 'sleep in atomic context' issue. This occurs because the brportstore function, while holding a lock that requires an atomic context, calls a function...

CVE-2026-63989

A flaw was found in the Linux kernel's bridge module. When configuring network bridge ports, a critical function was incorrectly holding a lock during an operation that could cause the system to pause unexpectedly. This can lead to a kernel crash, making the system unavailable and resulting in a...

Kazuar: Anatomy of a nation-state botnet

In this article 1. Delivery 2. Module types 3. Botnet operations 4. Who is Secret Blizzard? 5. Mitigation and protection guidance 6. Microsoft Defender detections Kazuar, a sophisticated malware family attributed to the Russian state actor Secret Blizzard, has been under constant development for...

Kazuar: Anatomy of a nation-state botnet

In this article 1. Delivery 2. Module types 3. Botnet operations 4. Who is Secret Blizzard? 5. Mitigation and protection guidance 6. Microsoft Defender detections Kazuar, a sophisticated malware family attributed to the Russian state actor Secret Blizzard, has been under constant development for...

CVE-2026-43100

A flaw was found in the Linux kernel's bridge module. A local user can trigger a null pointer dereference by creating a bridge with specific configuration options. This vulnerability can lead to a system crash, resulting in a Denial of Service DoS. Mitigation To mitigate this issue, prevent the...

CVE-2026-31752

A flaw was found in the Linux kernel's bridge module. A remote attacker could exploit this by sending a malformed Neighbor Discovery ND option. This could cause the brndsend function to improperly process option lengths, potentially leading to information disclosure or a denial of service DoS...

CVE-2026-31752

In the Linux kernel, the following vulnerability has been resolved: bridge: brndsend: validate ND option lengths brndsend walks ND options according to option-provided lengths. A malformed option can make the parser advance beyond the computed option span or use a too-short source LLADDR option...

EUVD-2025-201647

In the Linux kernel, the following vulnerability has been resolved: net: bridge: fix use-after-free due to MST port state bypass syzbot reported1 a use-after-free when deleting an expired fdb. It is due to a race condition between learning still happening and a port being deleted, after all its...

EUVD-2009-0478

Malware in sbrugna...

The vulnerability of the br_mst_set_state() function in the implementation of the IEEE 802.1D protocol in Linux kernel allows a attacker to compromise the confidentiality, integrity, and accessibility of the protected information.

The vulnerability of the brmstsetstate function in the net/bridge/brmst.c module of the IEEE 802.1D protocol implementation in the Linux operating system is related to the reallocation of previously released memory. Exploiting this vulnerability could allow an attacker to compromise the...

CVE-2024-40921

CVE-2024-40921 impacts the Linux kernel’s networking stack, specifically the bridge/mst path: the change fixes passing a vlan group pointer to br_mst_vlan_set_state by using the already obtained group rather than dereferencing it again. Root cause is a non-functional dereference path related to a...

Linux kernel security vulnerabilities

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that stems from a reference counting error in the fpga:bridge module...