CVE-2026-48736

Summary: CVE-2026-48736 affects Symfony's NoPrivateNetworkHttpClient and IpUtils::PRIVATE_SUBNETS, where IPv6 transition prefixes (6to4, NAT64, Teredo, IPv4‑mapped IPv6) could bypass private‑IP checks and enable SSRF-like behavior when processing attacker‑supplied URLs. What’s affected: Symfony f...

EUVD-2026-43243

parseipv4 in subsys/net/ip/utils.c reached via netipaddrparse for strings of the form "a.b.c.d:port" copies the port substring into a fixed 17-byte stack buffer char ipaddrNETIPV4ADDRLEN + 1 using a length of strlen - end - 1, where strlen is the full, unbounded input length and end is only the...

FTP Fetch, Windows x64 IPv6 Bind TCP Stager

Fetch and execute an x64 payload from an FTP server. Listen for an IPv6 connection Windows x64 Module Options This module requires Metasploit: https://metasploit.com/download Current source: https://github.com/rapid7/metasploit-framework module MetasploitModule include...

FTP Fetch, Windows Upload/Execute, Reverse TCP Stager (IPv6)

Fetch and execute an x86 payload from an FTP server. Uploads an executable and runs it staged. Connect back to the attacker over IPv6 Module Options This module requires Metasploit: https://metasploit.com/download Current source: https://github.com/rapid7/metasploit-framework module...

FTP Fetch, Linux Command Shell, Bind TCP Inline (IPv6)

Fetch and execute a x86 payload from an FTP server. Listen for a connection over IPv6 and spawn a command shell Module Options...

CVE-2026-53450 Coturn: IPv4-mapped 127.0.0.1 bypasses default loopback peer protection

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.13.0, coturn rejects loopback peers by default unless allow-loopback-peers is enabled, but the default loopback guard can be bypassed by using the IPv4-mapped IPv6 peer address ::ffff:127.0.0.1 in a TURN...

CVE-2026-59882

guzzlehttp/psr7 is a PSR-7 HTTP message library implementation in PHP. Prior to 2.12.3, Uri::assertValidHost does not reject URI host components containing authority delimiters, embedded ports, or malformed IPv6 brackets, allowing Uri::getHost to disagree with the URI authority used for security ...

flyto-core has SSRF guard bypass via IPv6 transition addresses (IPv4-mapped / 6to4 / NAT64) in validate_url_ssrf

Summary flyto-core's SSRF protection validateurlssrf / isprivateip in src/core/utils.py blocks private and metadata destinations by resolving the host and testing the resulting IP for membership in a hardcoded PRIVATEIPRANGES list. That list contains only the native RFC 1918 / loopback / link-loc...

kernel: tcp: fix potential race in tcp_v6_syn_recv_sock()

A flaw was found in the Linux kernel. A race condition exists in the TCP Transmission Control Protocol IPv6 Internet Protocol version 6 socket handling, specifically within the tcpv6synrecvsock function. This occurs because a child socket becomes visible in the TCP hash table before its...

kernel: netfilter: flowtable: strictly check for maximum number of actions

A flaw was found in the Netfilter flowtable component of the Linux kernel. This vulnerability occurs because the system does not strictly check the maximum number of hardware offload actions for IPv6, allowing it to process more actions than supported. This could potentially lead to system...

CVE-2026-53362

In the Linux kernel, the following vulnerability has been resolved: ipv6: account for fraggap on the paged allocation path In ip6appenddata, when the paged-allocation branch is taken MSGMORE / NETIFFSG / large fraglen, alloclen and pagedlen are computed as alloclen = fragheaderlen + transhdrlen;...

USN-8493-1: Linux kernel vulnerabilities

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - RISC-V architecture; - Cryptographic API; - InfiniBand drivers; - IOMMU subsystem; - Network drivers; -...

USN-8491-1: Linux kernel (OEM) vulnerabilities

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - ARM64 architecture; - x86 architecture; - Block layer subsystem; - Cryptographic API; - DMA engine subsystem; -...

kernel: netfilter: nft_inner: Fix IPv6 inner_thoff desync

A flaw was found in the Linux kernel's netfilter subsystem, specifically within the nftinner module. This vulnerability arises from an incorrect handling of IPv6 inner packet processing, where the transport header offset innerthoff becomes desynchronized from the Layer 4 protocol l4proto. A remot...

kernel: mptcp: fix slab-use-after-free in __inet_lookup_established

A flaw was found in the Linux kernel's Multipath TCP MPTCP implementation. Due to incorrect memory allocation for IPv6 subflow child sockets, a use-after-free vulnerability exists. A remote attacker could exploit this by triggering concurrent lookups in the kernel's hash table, potentially leadin...

RHEL 9 : kernel (RHSA-2026:34095)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:34095 advisory. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: mptcp: fix slab-use-after-fre...

ROS-20260701-73-0012

The vulnerability in the kernel-lt is related to the failure to release resources after their useful period has ended. Exploiting this vulnerability allows a remote attacker to cause service interruptions through specially created IPv6 traffic...

K000161993: Golang vulnerability CVE-2025-47912

Security Advisory Description The Parse function permits values other than IPv6 addresses to be included in square brackets within the host component of a URL. RFC 3986 permits IPv6 addresses to be included within the host component, enclosed within square brackets. For example: "http://::1/". IP...

CVE-2026-7656

The IPv6 Neighbor Discovery handlers in subsys/net/ip/ipv6nbr.c handlerainput, handlensinput, handlenainput used an incorrect boolean expression that combined the RFC 4861 validity checks with the ICMPv6 code check using the wrong operator precedence: the form was length/hop/source/target checks ...

CVE-2026-49412

A use-after-free vulnerability exists in the FreeBSD kernel's IPV6_MSFILTER socket option handler. The kernel handler drops a serializing lock while copying the source-filter list from userspace; if another thread frees the multicast filter structure during this window, the handler is left with a...