CVE-2026-98255

The Linux kernel contains a vulnerability where old Acknowledgements (ACKs) could bypass the fast path of the TCP stack. Specifically, ACKs before SND.UNA and after SND.NXT were not being properly validated, potentially allowing them to modify connection state or advance RCV.NXT prematurely. The ...

Unity Linux 20.1070a Security Update: kernel (UTSA-2025-990409)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-990409 advisory. In the Linux kernel, the following vulnerability has been resolved: tcp: do not accept ACK of bytes we never sent This patch is based on a detailed report and ideas...

Unity Linux 20.1070a Security Update: kernel (UTSA-2025-989027)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-989027 advisory. In the Linux kernel, the following vulnerability has been resolved: tcp: do not accept ACK of bytes we never sent This patch is based on a detailed report and ideas...

EUVD-2021-17241

Malware in sbrugna...

Linux Distros Unpatched Vulnerability : CVE-2023-52881

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Red Hat Enterprise Linux - kernel: TCP-spoofed ghost ACKs and leak leak initial sequence number Ubuntu Linux - tcp: do not accept ACK of bytes we never sent Thi...

Security Bulletin: This Power System update is being released to address CVE-2023-52881

Summary This affects the BMC's network transmission control protocol TCP interface which affects aspects of interfaces that use TCP including the BMC's secure shell SSH, HTTPS interfaces including the BMC's webserver, REST APIs, and ASMi web application, and event and subscriptions services. An...

OESA-2025-1094 kernel security update

The Linux Kernel, the operating system core itself. Security Fixes: In the Linux kernel, the following vulnerability has been resolved: ASoC: ops: Shift tested values in sndsocputvolsw by +min While the $val/$val2 values passed in from userspace are always = 0 integers, the limits of the control...

OESA-2024-2295 kernel security update

The Linux Kernel, the operating system core itself. Security Fixes: In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: Fix possible null pointer dereference. This patch fixes possible null pointer dereference in files "rvudebugfs.c" and "rvunix.c"CVE-2021-47484 In t...

SUSE CVE-2023-52881

In the Linux kernel, the following vulnerability has been resolved: tcp: do not accept ACK of bytes we never sent This patch is based on a detailed report and ideas from Yepeng Pan and Christian Rossow. ACK seq validation is currently following RFC 5961 5.2 guidelines: The ACK value is considered...

CVE-2023-52881

In the Linux kernel, the following vulnerability has been resolved: tcp: do not accept ACK of bytes we never sent This patch is based on a detailed report and ideas from Yepeng Pan and Christian Rossow. ACK seq validation is currently following RFC 5961 5.2 guidelines: The ACK value is considered...

CVE-2023-52881 tcp: do not accept ACK of bytes we never sent

In the Linux kernel, the following vulnerability has been resolved: tcp: do not accept ACK of bytes we never sent This patch is based on a detailed report and ideas from Yepeng Pan and Christian Rossow. ACK seq validation is currently following RFC 5961 5.2 guidelines: The ACK value is considered...

CVE-2023-52881

The CVE-2023-52881 entry describes a Linux kernel defect where the TCP ACK validation allowed acknowledging data never sent (ghost ACKs). Root cause: ACK sequence checks (per RFC 5961 guidance) could be bypassed, enabling ACKs that acknowledge bytes not yet transmitted, potentially leaking server...