CVE-2026-49412

The CVE (CVE-2026-49412) affects FreeBSD’s kernel IPv6 multicast source filter (IPV6_MSFILTER) handling. The issue is a use-after-free: the handler releases a serializing lock to copy the source-filter list from userspace and later reacquires it; during the window a competing thread can free the ...

ipv6: mcast: Fix use-after-free when processing MLD queries

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CVE-2026-53263

A flaw was found in the Linux kernel's 6lowpan component. An off-by-one error during multicast context address compression can lead to the transmission of uninitialized kernel stack memory over the network. This vulnerability results in information disclosure, potentially allowing an attacker to...

UBUNTU-CVE-2026-53275

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: Fix use-after-free when processing MLD queries When processing an MLD query, a pointer to the multicast group address is retrieved when initially parsing the packet. This pointer is later dereferenced without being...

CVE-2026-53275

A flaw was found in the Linux kernel's IPv6 multicast mcast component. When processing Multicast Listener Discovery MLD queries, a pointer to the multicast group address is not correctly reloaded after certain packet manipulations. This can lead to a use-after-free vulnerability, potentially...

CVE-2026-53275

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: Fix use-after-free when processing MLD queries When processing an MLD query, a pointer to the multicast group address is retrieved when initially parsing the packet. This pointer is later dereferenced without being...

CVE-2026-53275 ipv6: mcast: Fix use-after-free when processing MLD queries

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: Fix use-after-free when processing MLD queries When processing an MLD query, a pointer to the multicast group address is retrieved when initially parsing the packet. This pointer is later dereferenced without being...

CVE-2026-53275

CVE-2026-53275 affects the Linux kernel IPv6 multicast path (net/ipv6/mcast.c) during MLD query processing. A pointer to the multicast group address is captured during initial packet parsing but is not reloaded after skb header changes from pskb_may_pull(), leading to a use-after-free in __mld_qu...

CVE-2026-53275

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: Fix use-after-free when processing MLD queries When processing an MLD query, a pointer to the multicast group address is retrieved when initially parsing the packet. This pointer is later dereferenced without being...

EUVD-2026-39226

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: Fix use-after-free when processing MLD queries When processing an MLD query, a pointer to the multicast group address is retrieved when initially parsing the packet. This pointer is later dereferenced without being...

CVE-2026-53263

In the Linux kernel, the following vulnerability has been resolved: 6lowpan: fix off-by-one in multicast context address compression The second memcpy in lowpaniphcmcastctxaddrcompress uses &data1 as destination and &ipaddr-s6addr11 as source, but both should be offset by one: &data2 and...

CVE-2026-53263

In Linux kernel CVE-2026-53263, the 6lowpan multicast context address compression had an off‑by‑one in the second memcpy of lowpan_iphc_mcast_ctx_addr_compress(), using data[1] and ipaddr->s6_addr[11] instead of data[2] and ipaddr->s6_addr[12]. This caused data[1] to be overwritten (RIID co...

EUVD-2026-39214

In the Linux kernel, the following vulnerability has been resolved: 6lowpan: fix off-by-one in multicast context address compression The second memcpy in lowpaniphcmcastctxaddrcompress uses &data1 as destination and &ipaddr-s6addr11 as source, but both should be offset by one: &data2 and...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: net:cpswnew: The ndosetrxmode callback is executed within a work queue. Commit 1767bb2d47b7 “ipv6: mcast: Do not hold RTNL for IPV6ADDMEMBERSHIP and MCASTJOINGROUP.” removed the RTNL lock for these operations. However, this chang...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: Wifi: mt76: mt7996 – Drop fragments with multicast or broadcast RA. IEEE 802.11 fragmentation can only be applied to unicast frames. Therefore, fragments are dropped during multicast or broadcast RA. This patch addresses...

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 in Linux 5.10

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 in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: use rcu-safe version of ipv6getlladdr Some time ago, 8965779d2c0e "ipv6,mcast: always hold idev-lock before mcalock" switched ipv6getlladdr to ipv6getlladdr, which is a rcu-unsafe version. This was acceptable, as...

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

In the Linux kernel, the following vulnerability has been resolved: IB/ipoib: Fixed the issue with locking the mcast list. The release of priv-lock while iterating over priv-multicastlist in ipoibmcastjointask creates a situation where ipoibmcastdevFlush may remove the items while the iteration i...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: RDMA/ucma: Protects the mc object during concurrent multicast operations. The commit mentioned in the “Fixes” section has been partially reverted to ensure that the allocation and erasure of multicast structures are locked...