Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: net: Fixed an unsafe loop on the list. The kernel may crash when deleting a genetlink family if there are still listeners for that family: Oops: Kernel access to a corrupted area, sig: 11 1 … NIP c000000000c080bc...

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 found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: RDMA/cma: Allow UD qptype to join multicast only Regarding multicast: - The SIDR is the only mode that makes sense; - In addition to PSUDP, other port spaces like PSIB are also allowed, as they are UD-compatible. In this case,...

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...

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...