New Quasar Linux implant targets developers with rootkit and backdoor capabilities
QLNX is designed for stealth and long-term persistence, operating in-memory and employing multiple techniques to evade detection, including log wiping, proce...
Linux
20 articles
Pam Backdoor Targets Linux Systems to Steal SSH Credentials
A newly observed Linux backdoor technique, dubbed Pam, is exploiting the flexibility of Pluggable Authentication Modules (PAM) to capture SSH credentials and...
Quasar Linux RAT Steals Developer Credentials for Software Supply Chain Compromise
A previously undocumented Linux implant codenamed Quasar Linux RAT (QLNX) is targeting developers' systems to establish a silent foothold as well as facilita...
New Linux PamDOORa Backdoor Uses PAM Modules to Steal SSH Credentials
Cybersecurity researchers have disclosed details of a new Linux backdoor named PamDOORa that's being advertised on the Rehub Russian cybercrime forum for $1,...
Another Universal Linux Local Privilege Escalation (LPE) Vulnerability: Dirty Frag, (Fri, May 8th)
Less than two weeks after the public disclosure of the Copy Fail vulnerability (CVE-2026-31431), another local privilege escalation (LPE) vulnerability in th...
New Linux 'Dirty Frag' zero-day gives root on all major distros
A new Linux zero-day vulnerability, named Dirty Frag, allows local attackers to gain root privileges on most major Linux distributions with a single command. [.
PoC Exploit Released for Dirty Frag Linux Kernel Vulnerability
A proof-of-concept exploit for a new Linux kernel vulnerability class dubbed “Dirty Frag”. This universal local privilege escalation vulnerability allows att...
Linux Kernel Dirty Frag LPE Exploit Enables Root Access Across Major Distributions
Details have emerged about a new, unpatched local privilege escalation (LPE) vulnerability impacting the Linux kernel. Dubbed Dirty Frag, it has been describ...
Smashing Security podcast #466: Meta sees everything, Copy Fail, and a deepfake gets hired
Meta's smart glasses promise privacy "designed for you" - but everything they record was being beamed off to workers in Nairobi to label by hand. When those ...
Sophisticated Quasar Linux RAT Targets Software Developers
The persistent, evasive implant provides remote access, surveillance, and credential exfiltration capabilities. The post Sophisticated Quasar Linux RAT Targe...
Copy Fail: What You Need to Know About the Most Severe Linux Threat in Years
Copy Fail (CVE-2026-31431) is a critical Linux kernel LPE that allows stealthy root access. This flaw impacts millions of systems.
New stealthy Quasar Linux malware targets software developers
A previously undocumented Linux implant named Quasar Linux (QLNX) is targeting developers' systems with a mix of rootkit, backdoor, and credential-stealing c...
Copy Fail lands in CISA KEV as actively exploited Linux flaw threatens widespread privilege escalation
The Cybersecurity and Infrastructure Security Agency (CISA) has added another Linux kernel vulnerability, CVE-2026-31431, also known as Copy Fail, to the Kno...
‘Copy Fail’ is a real Linux security crisis wrapped in AI slop
The actively exploited defect could affect every mainstream Linux distribution built since 2017, but some researchers found Theori’s AI-generated disclosure ...
[local] Linux Kernel proc_readdir_de() 6.18-rc5 - Local Privilege Escalation
Linux Kernel proc_readdir_de() 6.
[local] Linux nf_tables 6.19.3 - Local Privilege Escalation
Linux nf_tables 6.19.
CISA Adds Actively Exploited Linux Root Access Bug CVE-2026-31431 to KEV
The U.S.
CISA Adds One Known Exploited Vulnerability to Catalog
CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. CVE-2026-31431 Linux Ker...
Nine-Year-Old Zero-Day Flaw in Linux Kernel Discovered by AI-Equipped Security Researcher
A researcher from offensive security firm Theori has found a nine-year-old flaw in the Linux kernel with the help of AI
Copy Fail (CVE-2026-31431): Frequently asked questions about Linux kernel privilege escalation vulnerability
A flaw in the Linux kernel present since 2017 allows a local user to gain root access on virtually every major Linux distribution. A public exploit is availa...