Important: Red Hat Security Advisory: kernel security update

An update for kernel is now available for Red Hat Enterprise Linux 9.4 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for...

kernel: Linux kernel: Privilege escalation or Denial of Service via TCP Fast Open vulnerability

A flaw was found in the Linux kernel. A local attacker with low privileges could exploit a memory corruption vulnerability, specifically a use-after-free and double-free, within the TCP Fast Open TFO socket processing. This occurs when a listener is closed while a TFO socket is being processed in...

kernel: tcp: Clear tcp_sk(sk)->fastopen_rsk in tcp_disconnect()

A flaw was found in the TCP subsystem in tcpdisconnect of the Linux kernel.The server-side TCP Fast Open socket was reused as a new client before the TFO socket completes, leading to an information leak...

Important: Red Hat Security Advisory: kernel security update

An update for kernel is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerabilit...

Important: Red Hat Security Advisory: kernel security update

An update for kernel is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is...

kernel: tcp: Clear tcp_sk(sk)->fastopen_rsk in tcp_disconnect()

A flaw was found in the TCP subsystem in tcpdisconnect of the Linux kernel.The server-side TCP Fast Open socket was reused as a new client before the TFO socket completes, leading to an information leak...

kernel: Linux kernel: Privilege escalation or Denial of Service via TCP Fast Open vulnerability

A flaw was found in the Linux kernel. A local attacker with low privileges could exploit a memory corruption vulnerability, specifically a use-after-free and double-free, within the TCP Fast Open TFO socket processing. This occurs when a listener is closed while a TFO socket is being processed in...

Important: Red Hat Security Advisory: kernel security update

An update for kernel is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring Syst...

kernel: Linux kernel: Privilege escalation or Denial of Service via TCP Fast Open vulnerability

A flaw was found in the Linux kernel. A local attacker with low privileges could exploit a memory corruption vulnerability, specifically a use-after-free and double-free, within the TCP Fast Open TFO socket processing. This occurs when a listener is closed while a TFO socket is being processed in...

kernel: tcp: Clear tcp_sk(sk)->fastopen_rsk in tcp_disconnect()

A flaw was found in the TCP subsystem in tcpdisconnect of the Linux kernel.The server-side TCP Fast Open socket was reused as a new client before the TFO socket completes, leading to an information leak...

kernel: Linux kernel: Privilege escalation or Denial of Service via TCP Fast Open vulnerability

A flaw was found in the Linux kernel. A local attacker with low privileges could exploit a memory corruption vulnerability, specifically a use-after-free and double-free, within the TCP Fast Open TFO socket processing. This occurs when a listener is closed while a TFO socket is being processed in...

SUSE CVE-2025-68221

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix address removal logic in mptcppmnlrmaddr Fix inverted WARNONONCE condition that prevented normal address removal counter updates. The current code only executes decrement logic when the counter is already 0 abnormal...

SUSE CVE-2025-68227

In the Linux kernel, the following vulnerability has been resolved: mptcp: Fix proto fallback detection with BPF The sockmap feature allows bpf syscall from userspace, or based on bpf sockops, replacing the skprot of sockets during protocol stack processing with sockmap's custom read/write...

RHEL 9 : kernel (RHSA-2025:23426)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2025:23426 advisory. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: scsi: qla2xxx: Wait for io...

FreeBSD : FreeBSD -- ipfw denial of service (0b22e22a-dae9-11f0-80b8-bc241121aa0a)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 0b22e22a-dae9-11f0-80b8-bc241121aa0a advisory. In some cases, the tcp-setmss handler may free the packet data and throw an error without halting the...

RHEL 8 : kernel (RHSA-2025:23463)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2025:23463 advisory. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: ethtool: check device is...

RHEL 9 : kernel-rt (RHSA-2025:23424)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2025:23424 advisory. The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism...

RHEL 9 : kernel (RHSA-2025:23450)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2025:23450 advisory. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: wifi: cfg80211: fix...

RHEL 9 : kernel (RHSA-2025:23423)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2025:23423 advisory. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: scsi: qla2xxx: Wait for io...

EUVD-2025-203789

In the Linux kernel, the following vulnerability has been resolved: mptcp: Initialise rcvmss before calling tcpsendactivereset in mptcpdofastclose. syzbot reported divide-by-zero in tcpselectwindow by MPTCP socket. 0 We had a similar issue for the bare TCP and fixed in commit 499350a5a6e7 "tcp:...