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Tag: kernel

U.S. CISA adds Android and Linux Kernel flaws to its Known Exploited Vulnerabilities catalog

U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Android and Linux Kernel flaws to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added Windows Shell and ConnectWise ScreenConnect flaws to its Known Exploited Vulnerabilities (KEV) catalog. Below are the flaws added to the catalog: CVE-2022-0492 (CVSS score of 7.0) Linux Kernel Improper Authentication…

Making Vulnerable Drivers Exploitable Without Hardware – The BYOVD Perspective

1 Introduction This article provides a technical analysis of how many Windows kernel mode drivers can be interacted with from user mode without the hardware they were developed for. This work was motivated by driver-oriented vulnerability research and the need to evaluate the exploitability of individual findings, which frequently affect code whose reachability is hardware-gated.…

9-Year-Old Linux Kernel Flaw Enables Root Command Execution on Major Distros

Cybersecurity researchers have disclosed details of a vulnerability in the Linux kernel that remained undetected for nine years. The vulnerability, tracked as CVE-2026-46333 (CVSS score: 5.5), is a case of improper privilege management that could permit an unprivileged local user to disclose sensitive files and execute arbitrary commands as root on default installations of several…

DirtyDecrypt: PoC Released for yet another Linux flaw

DirtyDecrypt (CVE-2026-31635): working PoC out for a Linux kernel LPE flaw. Missing COW guard in rxgk_decrypt_skb lets local attackers reach root. After Copy Fail, Dirty Frag, and Fragnesia, here comes DirtyDecrypt, another local privilege escalation vulnerability in the kernel, this time with a working proof-of-concept already out in the open. The flaw was discovered and…

Linux Kernel bug Fragnesia allows local root access attacks

Fragnesia, a new Linux kernel flaw tracked as CVE-2026-46300, could let local attackers gain root access through page cache corruption. Researchers disclosed a new Linux kernel privilege escalation vulnerability named Fragnesia, tracked as CVE-2026-46300 (CVSS score of 7.8). The flaw affects the XFRM ESP-in-TCP subsystem and could allow local attackers to gain full root access…

Linux kernel maintainers suggest a ‘kill switch’ to protect systems until a zero-day vulnerability is patched

Linux server admins may get the ability to turn off a vulnerable function in the OS kernel until a patch for a zero-day vulnerability is ready, if a proposal from a kernel developer and maintainer is accepted by the open source community. The idea of a kill switch for privileged operators has been suggested by…

Linux developers weigh emergency “killswitch” for vulnerable kernel functions

Linux kernel developers are reviewing a proposal for an emergency risk mitigation mechanism (“Killswitch”) that would allow administrators to disable vulnerable kernel functions at runtime. The proposal, submitted by Linux kernel developer/maintainer Sasha Levin, arrives in the wake of the public disclosure of two privilege escalation vulnerabilities affecting the Linux kernel. What prompted the proposal…

Dirty Frag: A new Linux privilege escalation vulnerability is already in the wild

Dirty Frag: unpatched Linux kernel flaw grants root access on Ubuntu, RHEL and Fedora. A working exploit is already public. Security researchers have disclosed a new unpatched vulnerability in the Linux kernel, code-named Dirty Frag, that allows an unprivileged local user to gain full root access on most major Linux distributions, including Ubuntu, RHEL, Fedora,…

U.S. CISA adds a flaw in Linux Kernel to its Known Exploited Vulnerabilities catalog

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds a flaw in Linux Kernel to its Known Exploited Vulnerabilities catalog The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added a flaw in the Linux Kernel, tracked as CVE-2026-31431 (CVSS score of 7.8), to its Known Exploited Vulnerabilities (KEV) catalog. Recently, Xint Code researchers warned of a serious Linux…

mquire: Open-source Linux memory forensics tool

Linux memory forensics has long depended on debug symbols tied to specific kernel versions. These symbols are not installed on production systems by default, and sourcing them from external repositories creates a recurring problem: repositories go stale, kernel builds diverge, and analysts working incident response often find no published symbols for the exact kernel they…

Linux kernel 6.19 reaches stable release, kernel 7.0 work is already underway

Development activity on the Linux kernel continues into early 2026 with the stable release of version 6.19. Kernel maintainers have completed the pre-release cycle and merged the final set of changes into the mainline tree. The release follows the ongoing weekly rhythm of code submission and testing that supports Linux’s widespread use across servers, desktops,…

Linux kernel 6.19 reaches stable release, kernel 7.0 work is already underway

Development activity on the Linux kernel continues into early 2026 with the stable release of version 6.19. Kernel maintainers have completed the pre-release cycle and merged the final set of changes into the mainline tree. The release follows the ongoing weekly rhythm of code submission and testing that supports Linux’s widespread use across servers, desktops,…

Attackers exploit decade‑old Windows driver flaw to shut down modern EDR defenses

In a recent incident, attackers abused a legitimate but vulnerable Windows kernel driver to shut down endpoint security tools during an ongoing incident response. According to a Huntress report, the activity was observed during a customer investigation in early 2026 and involved the use of an old EnCase forensic driver (by Guidance Software) as part…