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 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: Bug: Unchecked dereferencing of a NULL pointer in the kernel. Address: 0000000000000000 Causes: - ip6rcvcore net/ipv6/ip6input.c:190:20 - ipv6rcv net/ipv6/ip6input.c:306:8 - processbacklog net.core/dev.c:6186:4 - napipoll...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: net: dsa: clean up FDB, MDB, VLAN entries on unbind As explained in many places, such as commit b117e1e8a86d “net: dsa: delete dsalegacyfdbadd and dsalegacyfdbdel”, DSA is written under the assumption that higher layers perform...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: RDMA/cm: Fixed the issue of leaking the multicast GID table reference. If the CM ID is destroyed while the CM event for multicast creation is still queued, the cancelworksync function will prevent the work from running. This also...

AlmaLinux 9.2 [TuxCare] Security Update: corosync / corosync-vqsim / corosynclib / corosynclib-devel (ALMALINUX9.2:CLSA-2026:1790352190)

The AlmaLinux 9.2 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1790352190 advisory. - A heap-based buffer overflow was found in Corosync's Totem Process Group totempg message reassembly. When processing fragmented multicast...

AlmaLinux 9.6 [TuxCare] Security Update: corosync / corosync-vqsim / corosynclib / corosynclib-devel (ALMALINUX9.6:CLSA-2026:1790008457)

The AlmaLinux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1790008457 advisory. - A heap-based buffer overflow was found in Corosync's Totem Process Group totempg message reassembly. When processing fragmented multicast...

Rocky Linux 9.6 [TuxCare] Security Update: corosync / corosync-vqsim / corosynclib / corosynclib-devel (ALMALINUX9.6:CLSA-2026:1790008457)

The Rocky Linux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1790008457 advisory. - A heap-based buffer overflow was found in Corosync's Totem Process Group totempg message reassembly. When processing fragmented multicast...

SUSE CVE-2026-97939

In the Linux kernel, the following vulnerability has been resolved: ipmr: account multicast table and route memory A netadmin in a user+net namespace can create many IPv4 and IPv6 multicast routing tables with MRTTABLE and MRT6TABLE. Each unseen id allocates an mrtable via the shared mrtablealloc...

CVE-2026-97939

A flaw was found in the Linux kernel's IP multicast routing subsystem. A local user with network administration privileges inside a network namespace can create an excessive number of multicast routing tables. Because these allocations are not tracked against memory control group limits, kernel...

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...

Amazon Linux 2 : corosync (ALAS-2026-3955)

The version of corosync installed on the remote host is prior to 2.4.3-6. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3955 advisory. A heap-based buffer overflow was found in Corosync's Totem Process Group totempg message reassembly. When processing fragmented...

Important: corosync

Issue Overview: A heap-based buffer overflow was found in Corosync's Totem Process Group totempg message reassembly. When processing fragmented multicast messages, the buffer used to reassemble fragments lacks a runtime bounds check in release builds. A network-adjacent attacker able to send...

CVE-2026-98026

A flaw was found in the Linux kernel's network bridge subsystem. An attacker could exploit this vulnerability to cause a Denial of Service DoS or system crash through a use-after-free condition. This issue occurs during multicast port group removal, where the kernel immediately frees data...

CVE-2026-98122

A flaw was found in the Linux kernel's Virtual Extensible LAN VXLAN driver. A local unprivileged attacker can cause a denial of service DoS or potentially escalate privileges through memory corruption. This vulnerability occurs because the Multicast Database MDB subsystem improperly validates...

Important: corosync

Issue Overview: A heap-based buffer overflow was found in Corosync's Totem Process Group totempg message reassembly. When processing fragmented multicast messages, the buffer used to reassemble fragments lacks a runtime bounds check in release builds. A network-adjacent attacker able to send...

CVE-2026-98101

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: use copy-on-write RCU updates in ip6mcsource pmc-sflist is read locklessly under rcureadlock by inet6mccheck during packet reception in the UDP and RAW multicast receive paths. ip6mcsource mutated psl-sladdr and...

DEBIAN-CVE-2026-98099

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: use rcuassignpointer for rcu list updates Several places in net/ipv6/mcast.c update RCU-protected lists np-ipv6mclist, idev-mclist, idev-mctomb using direct pointer assignments instead of rcuassignpointer: 1. In...

DEBIAN-CVE-2026-97939

In the Linux kernel, the following vulnerability has been resolved: ipmr: account multicast table and route memory A netadmin in a user+net namespace can create many IPv4 and IPv6 multicast routing tables with MRTTABLE and MRT6TABLE. Each unseen id allocates an mrtable via the shared mrtablealloc...

AZL-104625 CVE-2026-97939 affecting package kernel 6.6.157.1-1

In the Linux kernel, the following vulnerability has been resolved: ipmr: account multicast table and route memory A netadmin in a user+net namespace can create many IPv4 and IPv6 multicast routing tables with MRTTABLE and MRT6TABLE. Each unseen id allocates an mrtable via the shared mrtablealloc...

CVE-2026-97939

In the Linux kernel, the following vulnerability has been resolved: ipmr: account multicast table and route memory A netadmin in a user+net namespace can create many IPv4 and IPv6 multicast routing tables with MRTTABLE and MRT6TABLE. Each unseen id allocates an mrtable via the shared mrtablealloc...