kernel: tcp: fix tcp_mtup_probe_success vs wrong snd_cwnd

In the Linux kernel, the following vulnerability has been resolved: tcp: fix tcpmtupprobesuccess vs wrong sndcwnd syzbot got a new report 1 finally pointing to a very old bug, added in initial support for MTU probing. tcpmtuprobe has checks about starting an MTU probe if tcpsndcwndtp = 11. But...

kernel: ipv6: ensure sane device mtu in tunnels

A flaw was found in the Linux kernel’s IPv6 networking code affecting the handling of IPv6 GRE tunnels. Under certain conditions, an IPv6 tunnel configuration could result in an invalid MTU Maximum Transmission Unit value being written to a network device without sanitization. Because the MTU val...

kernel: tcp: Fix a data-race around sysctl_tcp_mtu_probe_floor.

In the Linux kernel, the following vulnerability has been resolved: tcp: Fix a data-race around sysctltcpmtuprobefloor. While reading sysctltcpmtuprobefloor, it can be changed concurrently. Thus, we need to add READONCE to its reader...

PT-2025-8531 · Linux +2 · Linux Kernel +2

Name of the Vulnerable Software and Affected Versions: Linux kernel affected versions not specified Description: A data-race issue exists in the Linux kernel related to sysctl tcp mtu probing. This issue occurs because the value of sysctl tcp mtu probing can be changed concurrently while it is...

PT-2025-8527 · Linux +2 · Linux Kernel +2

Name of the Vulnerable Software and Affected Versions: Linux kernel affected versions not specified Description: A data-race issue exists around sysctl tcp mtu probe floor in the Linux kernel. The value of sysctl tcp mtu probe floor can be changed concurrently while it is being read, which requir...

CVE-2023-20027

A vulnerability in the implementation of the IPv4 Virtual Fragmentation Reassembly VFR feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition on an affected device. This vulnerability is due to improper reassembly of large packe...

CVE-2023-20027 Cisco IOS XE Software Virtual Fragmentation Reassembly Denial of Service Vulnerability

A vulnerability in the implementation of the IPv4 Virtual Fragmentation Reassembly VFR feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition on an affected device. This vulnerability is due to improper reassembly of large packe...

CVE-2023-20027

A vulnerability in the implementation of the IPv4 Virtual Fragmentation Reassembly VFR feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition on an affected device. This vulnerability is due to improper reassembly of large packe...

Cisco IOS XE Software Virtual Fragmentation Reassembly Denial of Service Vulnerability

A vulnerability in the implementation of the IPv4 Virtual Fragmentation Reassembly VFR feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition on an affected device. This vulnerability is due to improper reassembly of large packe...

CVE-2023-28116 Buffer overflow in L2CAP due to misconfigured MTU

Contiki-NG is an open-source, cross-platform operating system for internet of things IoT devices. In versions 4.8 and prior, an out-of-bounds write can occur in the BLE L2CAP module of the Contiki-NG operating system. The network stack of Contiki-NG uses a global buffer packetbuf for processing o...

Debian: Security Advisory (DLA-310-1)

The remote host is missing an update for the Debian SPDX-FileCopyrightText: 2023 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

K22843911: F5 Path MTU Discovery vulnerability CVE-2015-7759

Security Advisory Description BIG-IP LTM, AAM, AFM, Analytics, APM, ASM, Link Controller, and PEM 12.0.0 before HF1, when the TCP profile for a virtual server is configured with Congestion Metrics Cache enabled, allow remote attackers to cause a denial of service Traffic Management Microkernel TM...

K15792: Path MTU discovery vulnerability CVE-2004-1060

Security Advisory Description Multiple TCP/IP and ICMP implementations, when using Path MTU PMTU discovery PMTUD, allow remote attackers to cause a denial of service network throughput reduction for TCP connections via forged ICMP "Fragmentation Needed and Don't Fragment was Set" packets with a l...

K52510343: ICMP PMTU messages are forwarded to the server side when the TCP proxy-mss setting is enabled in the associated profile

Security Advisory Description This issue occurs when all of the following conditions are met: Internet Control Message Protocol ICMP path maximum transmission unit PMTU messages are forwarded through the BIG-IP system running on the affected versions. OneConnect or SNAT is configured and actively...

SUSE CVE-2013-4163

The ip6appenddatamtu function in net/ipv6/ip6output.c in the IPv6 implementation in the Linux kernel through 3.10.3 does not properly maintain information about whether the IPV6MTU setsockopt option had been specified, which allows local users to cause a denial of service BUG and system crash via...

SUSE CVE-2013-7098

OpenConnect VPN client with GnuTLS before 5.02 contains a heap overflow if MTU is increased on reconnection...

SUSE CVE-2015-0272

GNOME NetworkManager allows remote attackers to cause a denial of service IPv6 traffic disruption via a crafted MTU value in an IPv6 Router Advertisement RA message, a different vulnerability than CVE-2015-8215...

SUSE CVE-2020-35499

A NULL pointer dereference flaw in Linux kernel versions prior to 5.11 may be seen if scosockgetsockopt function in net/bluetooth/sco.c do not have a sanity check for a socket connection, when using BTSNDMTU/BTRCVMTU for SCO sockets. This could allow a local attacker with a special user privilege...

GSD-2022-1008281 macvlan: enforce a consistent minimal mtu

macvlan: enforce a consistent minimal mtu This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.14.300 by commit...

GSD-2022-1008214 macvlan: enforce a consistent minimal mtu

macvlan: enforce a consistent minimal mtu This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.19.267 by commit...