Linux Kernel
CISA alerts of active exploitation of three Linux kernel flaws
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) is warning that hackers are exploiting three Linux kernel vulnerabilities, one of them rated critical. The three security issues were added separately last week and have severity ratings ranging from medium to critical. One of them, tracked as CVE-2025-39964, existed in the Linux kernel for 14 years. […]
New Linux ‘Copy Fail’ flaw gives hackers root on major distros
An exploit has been published for a local privilege escalation vulnerability dubbed “Copy Fail” that impacts Linux kernels released since 2017, allowing an unprivileged local attacker to gain root permissions. The vulnerability is tracked as CVE-2026-31431 and was discovered by the offensive security company Theori, using its AI-driven pentesting platform Xint Code after scaning the […]
CISA: High-severity Linux flaw now exploited by ransomware gangs
CISA confirmed on Thursday that a high-severity privilege escalation flaw in the Linux kernel is now being exploited in ransomware attacks. While the vulnerability (tracked as CVE-2024-1086) was disclosed on January 31, 2024, as a use-after-free weakness in the netfilter: nf_tables kernel component and was fixed via a commit submitted in January 2024, it was first introduced […]
Google fixes actively exploited Android flaws in September update
Google has released the September 2025 security update for Android devices, addressing a total of 84 vulnerabilities, including two actively exploited flaws. The two flaws that were detected as exploited in zero-day attacks are CVE-2025-38352, an elevation of privilege in the Android kernel, and CVE-2025-48543, also an elevation of privilege problem in the Android Runtime component. Google noted […]
New Tor Oniux tool anonymizes any Linux app’s network traffic
Tor has announced Oniux, a new command-line tool for routing any Linux application securely through the Tor network for anonymized network connections. Unlike classic methods like torsocks, which rely on user-space tricks, Oniux uses Linux namespaces to create a fully isolated network environment for each application, preventing data leaks even if the app is malicious […]
CISA orders agencies to patch Linux kernel bug exploited in attacks
CISA has ordered federal agencies to secure their systems within three weeks against a high-severity Linux kernel flaw actively exploited in attacks. Tracked as CVE-2024-53104, the security bug was first introduced in kernel version 2.6.26 and was patched by Google for Android users on Monday. “There are indications that CVE-2024-53104 may be under limited, targeted exploitation,” the Android February 2025 […]
New stealthy Pumakit Linux rootkit malware spotted in the wild
A new Linux rootkit malware called Pumakit has been discovered that uses stealth and advanced privilege escalation techniques to hide its presence on systems. The malware is a multi-component set that includes a dropper, memory-resident executables, a kernel module rootkit, and a shared object (SO) userland rootkit. Elastic Security discovered Pumakit in a suspicious binary (‘cron’) upload […]
Linux kernel impacted by new SLUBStick cross-cache attack
A novel Linux Kernel cross-cache attack named SLUBStick has a 99% success in converting a limited heap vulnerability into an arbitrary memory read-and-write capability, letting the researchers elevate privileges or escape containers. The discovery comes from a team of researchers from the Graz University of Technology who demonstrated the attack on Linux kernel versions 5.9 and 6.2 (latest) using […]