CVE-2026-30827 express-rate-limit: IPv4-mapped IPv6 addresses bypass per-client rate limiting (all IPv4 clients share one bucket on dual-stack servers)

express-rate-limit is a basic rate-limiting middleware for Express. In versions starting from 8.0.0 and prior to versions 8.0.2, 8.1.1, 8.2.2, and 8.3.0, the default keyGenerator in express-rate-limit applies IPv6 subnet masking /56 by default to all addresses that net.isIPv6 returns true for. Th...

CVE-2026-30827

CVE-2026-30827 affects express-rate-limit for Express. The default keyGenerator mishandles IPv4 when the system treats IPv4 addresses as IPv6 mapped (IPv4-mapped IPv6 addresses like ::ffff:x.x.x.x). On dual-stack servers, this causes a /56 subnet mask to be applied to all IPv6 addresses, making a...

express-rate-limit: IPv4-mapped IPv6 addresses bypass per-client rate limiting on servers with dual-stack network

Summary The default keyGenerator in express-rate-limit applies IPv6 subnet masking /56 by default to all addresses that net.isIPv6 returns true for. This includes IPv4-mapped IPv6 addresses ::ffff:x.x.x.x, which Node.js returns as request.ip on dual-stack servers. Because the first 80 bits of all...

USN-8070-1: 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: - x86 architecture; - MMC subsystem; - Network drivers; - USB Device Class drivers; - BTRFS file system; - File syste...

Unity Linux 20.1070e Security Update: kernel (UTSA-2026-005548)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-005548 advisory. In the Linux kernel, the following vulnerability has been resolved: netfilter: nftables: prevent nfskbduplicated corruption syzbot found that nfdupipv4 or nfdupipv6...

The vulnerability of the tcp_add_backlog() function in the net/ipv4/tcp_ipv4.c module, which is part of the Linux operating system’s IPv4 protocol implementation, allows a hacker to cause a service failure.

The vulnerability of the tcpaddbacklog function in the net/ipv4/tcpipv4.c module, which is part of the Linux operating system’s IPv4 protocol implementation, involves integer overflow or cyclic shift vulnerabilities. Exploiting this vulnerability could allow a remote attacker to cause a service...

CVE-2026-26324 OpenClaw has a SSRF guard bypass via full-form IPv4-mapped IPv6 (loopback / metadata reachable)

OpenClaw is a personal AI assistant. Prior to version 2026.2.14, OpenClaw's SSRF protection could be bypassed using full-form IPv4-mapped IPv6 literals such as 0:0:0:0:0:ffff:7f00:1 which is 127.0.0.1. This could allow requests that should be blocked loopback / private network / link-local metada...

CVE-2026-26324

OpenClaw is a personal AI assistant. Prior to version 2026.2.14, OpenClaw's SSRF protection could be bypassed using full-form IPv4-mapped IPv6 literals such as 0:0:0:0:0:ffff:7f00:1 which is 127.0.0.1. This could allow requests that should be blocked loopback / private network / link-local metada...

CVE-2026-23154

In the Linux kernel, the following vulnerability has been resolved: net: fix segmentation of forwarding fraglist GRO This patch enhances GSO segment handling by properly checking the SKBGSODODGY flag for fraglist GSO packets, addressing low throughput issues observed when a station accesses IPv4...

CVE-2025-12899

A flaw in Zephyr’s network stack allows an IPv4 packet containing ICMP type 128 to be misclassified as an ICMPv6 Echo Request. This results in an out-of-bounds memory read and creates a potential information-leak vulnerability in the networking subsystem...

ROS-20260128-73-0020

A vulnerability in the net/ipv4/ipgre.c and net/ipv6/ip6gre.c modules of the Linux operating system kernel is related to resource management errors. Exploitation of the vulnerability could allow an attacker to cause a denial of service...

CVE-2026-23004 dst: fix races in rt6_uncached_list_del() and rt_del_uncached_list()

In the Linux kernel, the following vulnerability has been resolved: dst: fix races in rt6uncachedlistdel and rtdeluncachedlist syzbot was able to crash the kernel in rt6uncachedlistflushdev in an interesting way 1 Crash happens in listdelinit/INITLISTHEAD while writing list-prev, while the prior...

Azure Linux 3.0 Security Update: kernel (CVE-2025-38192)

The version of kernel installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2025-38192 advisory. - In the Linux kernel, the following vulnerability has been resolved: net: clear the dst when changing skb...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-001888)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-001888 advisory. Integer overflow in the pinginitsock function in net/ipv4/ping.c in the Linux kernel through 3.14.1 allows local users to cause a denial of service use-after-free an...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-001915)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-001915 advisory. The nfnatredirectipv4 function in net/netfilter/nfnatredirect.c in the Linux kernel before 4.4 allows remote attackers to cause a denial of service NULL pointer...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-002256)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-002256 advisory. The nfnatredirectipv4 function in net/netfilter/nfnatredirect.c in the Linux kernel before 4.4 allows remote attackers to cause a denial of service NULL pointer...

CVE-2025-71097 ipv4: Fix reference count leak when using error routes with nexthop objects

In the Linux kernel, the following vulnerability has been resolved: ipv4: Fix reference count leak when using error routes with nexthop objects When a nexthop object is deleted, it is marked as dead and then fibtableflush is called to flush all the routes that are using the dead nexthop. The...

PT-2026-2618

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A reference count leak exists in the IPv4 implementation when using error routes with nexthop objects. Specifically, when a nexthop object is deleted, error routes do not get flushed,...

PT-2026-27665

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A kernel panic occurs when an IPv4 route references a standalone IPv6 nexthop object created with a loopback device. The function fib6 nh init misclassifies these objects as reject route...

CVE-2025-65568

The CVE-2025-65568 issue affects the omec-project UPF pfcpiface (upf-epc-pfcpiface:2.1.3-dev). During a PFCP Session Establishment Request, a CreateFAR with an empty or truncated IPv4 address triggers an out-of-bounds read in parseFAR() via ip2int(), causing an index-out-of-range panic and a deni...