Microsoft has reported that two vulnerabilities in its Defender software are currently being exploited. The first, identified as CVE-2026-41091, is a privilege escalation flaw that has a CVSS score of 7.8, meaning it poses a significant risk. If successfully exploited, attackers could gain SYSTEM privileges, which would allow them to control the affected systems. The second vulnerability is a denial-of-service flaw, though specific details about its CVE designation weren't provided. These vulnerabilities affect Microsoft Defender, and users of the software should be vigilant as attackers are actively exploiting these flaws in the wild. It's crucial for individuals and organizations to take immediate action to secure their systems.
Articles tagged "Privilege Escalation"
Found 37 articles
Researchers have revealed a vulnerability in the Linux kernel, identified as CVE-2026-46333, which has remained unnoticed for nine years. This flaw involves improper privilege management, allowing unprivileged local users to access sensitive files and execute commands with root privileges on default installations of several major Linux distributions. The vulnerability has a CVSS score of 5.5, indicating a moderate severity level. Affected users include those running various Linux distributions, which could expose them to significant risks if exploited. It's crucial for system administrators and users to be aware of this vulnerability and take appropriate action to secure their systems.
Drupal has issued urgent security updates to address a serious vulnerability in Drupal Core, identified as CVE-2026-9082. This flaw can allow attackers to execute malicious code remotely, escalate privileges, or disclose sensitive information on PostgreSQL sites. With a CVSS score of 6.5, the vulnerability affects users relying on Drupal's database abstraction API. This issue is particularly concerning for organizations using Drupal for their web applications, as the potential for exploitation could lead to significant data breaches or system compromises. Users are strongly advised to apply the available security updates promptly to mitigate the risk.
Security Affairs
A newly discovered Linux local privilege escalation vulnerability, named PinTheft, affects the RDS subsystem and has a public exploit available. This flaw poses a significant risk to Arch Linux users, as they are particularly vulnerable to attacks utilizing this exploit. The vulnerability was identified by the V12 security team, and given the increasing number of similar security issues in Linux, users are urged to take immediate action. Patching the affected systems is crucial to prevent potential exploitation. This incident serves as a reminder for users and administrators to stay vigilant and regularly update their systems to safeguard against emerging threats.
A new vulnerability known as PinTheft has been identified in Arch Linux systems, allowing local attackers to escalate their privileges to root. This flaw has been patched recently, but now a proof-of-concept exploit has been released publicly, which could make it easier for malicious actors to take advantage of the vulnerability. Users running Arch Linux should be particularly vigilant, as this could lead to unauthorized access and control over affected systems. The presence of a publicly available exploit raises concerns about potential attacks, especially in environments where security measures may not be robust. It’s crucial for users to apply the latest patches and updates to mitigate the risks associated with this vulnerability.
Researchers recently released a proof of concept (PoC) for a vulnerability in the Linux kernel known as DirtyDecrypt, which was patched back in April. This vulnerability allows local attackers to gain elevated privileges, potentially giving them root access to affected systems. While the vulnerability was addressed in a previous update, the release of the PoC means that those who haven't applied the patch could be at risk. It is crucial for users and administrators of Linux systems to ensure they are running the latest updates to mitigate this risk. The implications of this vulnerability are significant, especially for environments where security is paramount, such as servers and critical infrastructure.
Security Affairs
A security researcher known as Chaotic Eclipse has disclosed a serious zero-day vulnerability in Windows called MiniPlasma, which allows attackers to gain SYSTEM privileges on fully updated Windows 11 systems. This flaw, affecting the 'cldflt.sys' file, was believed to have been patched back in 2020 under the CVE-2020-17103 designation, but it appears that the fix was either incomplete or not properly implemented. The existence of a proof-of-concept exploit for this vulnerability raises significant concerns for users and organizations, as it could allow malicious actors to escalate their privileges and potentially take control of affected systems. This issue affects all patched versions of Windows 11, meaning a wide range of users are at risk. Companies should prioritize reviewing their security protocols and consider additional monitoring to mitigate potential exploitation.
A recently discovered vulnerability in the Linux kernel's rxgk module allows attackers to escalate their privileges and gain root access on certain systems. This flaw has been patched, but a proof-of-concept exploit is now available, which can be used by malicious actors to take control of affected machines. Users of Linux systems, particularly those running versions that include the vulnerable module, are at risk. It's crucial for system administrators to apply the latest patches to protect against potential exploitation. The existence of an exploit in the wild raises significant concerns about the security of Linux environments, especially in sensitive applications.
A cybersecurity researcher has disclosed a serious vulnerability in Windows, known as 'MiniPlasma', which allows attackers to escalate their privileges to SYSTEM level on fully patched systems. This zero-day exploit poses a significant risk because it can enable unauthorized access to sensitive data and system controls. Users of Windows systems, particularly those in corporate environments, should be on high alert as this exploit can potentially be used in cyberattacks. The researcher has also released a proof-of-concept (PoC) for the exploit, which can facilitate its misuse by malicious actors. This situation underscores the need for immediate attention to system security measures and vigilance against potential exploitation.
Researchers have identified four vulnerabilities in OpenClaw, a software framework that could be exploited by attackers to steal data, gain higher privileges, and maintain persistent access to systems. These vulnerabilities, referred to as Claw Chain, allow cybercriminals to infiltrate systems, extract sensitive information, and install backdoors for ongoing access. The flaws pose a significant risk to organizations using OpenClaw, as they can lead to serious data breaches and unauthorized control over affected systems. Companies that rely on this software should take immediate action to address these vulnerabilities to protect their data and systems from potential exploitation.
Security Affairs
Researchers have identified a new vulnerability in the Linux kernel, named Fragnesia and tracked as CVE-2026-46300, which could allow local attackers to gain root access through page cache corruption. This flaw affects the XFRM ESP-in-TCP subsystem and has a CVSS score of 7.8, indicating a significant risk. If exploited, it could enable attackers to take complete control of the affected systems. It's crucial for users of affected Linux systems to be aware of this vulnerability and take necessary precautions. The disclosure of this flaw highlights ongoing security challenges within the Linux ecosystem.
Help Net Security
CVE-2026-46300Researchers have discovered a new local privilege escalation vulnerability in the Linux kernel, identified as CVE-2026-46300, and nicknamed 'Fragnesia.' This vulnerability is related to the earlier Dirty Frag bugs and affects the xfrm-ESP Linux module. The flaw was unintentionally introduced when a patch was applied to fix one of the original Dirty Frag vulnerabilities, specifically CVE-2026-43284. This means that systems using the affected module could be at risk, potentially allowing attackers to gain elevated privileges. It is crucial for users and administrators of Linux systems to stay informed about this issue and apply necessary updates as they become available.
Infosecurity Magazine
A new vulnerability known as the Fragnesia flaw has been discovered in the Linux kernel, allowing unprivileged local users to escalate their privileges to root access. This flaw poses a significant risk as it enables attackers with local access to gain complete control over affected systems. Researchers have indicated that various Linux distributions could be impacted, making it crucial for system administrators to assess their environments. The potential for exploitation is concerning, especially in multi-user setups where unauthorized users could exploit this flaw to compromise system integrity. Users and administrators should prioritize patching their systems to mitigate the risk associated with this vulnerability.
A new variant of a local privilege escalation vulnerability in the Linux kernel, named Fragnesia, has been identified. This vulnerability, tracked as CVE-2026-46300 with a CVSS score of 7.8, allows local attackers to gain root access through page cache corruption. This marks the third such vulnerability discovered in the Linux kernel within just two weeks, raising concerns for users and administrators. The flaw is rooted in the kernel's XFRM component, which is responsible for managing IPsec protocols. This means that systems using affected kernel versions could be at risk if not addressed promptly, as attackers could exploit this vulnerability to gain elevated privileges and potentially take control of vulnerable systems.
Schneier on Security
A newly disclosed Linux vulnerability, dubbed 'copy.fail', poses a serious risk across multiple distributions, including Ubuntu, RHEL, Debian, SUSE, Amazon Linux, and Fedora. Revealed by Theori on April 29, 2026, this local privilege escalation flaw allows attackers to manipulate the Linux kernel's crypto API to write unauthorized data into the page cache of files they do not own. Importantly, the exploit does not modify files on disk, making it difficult for traditional monitoring tools like AIDE and Tripwire to detect. This vulnerability is concerning because it affects a wide range of systems without requiring any specific modifications for different distributions. Organizations using these Linux variants should prioritize assessing their security posture and applying necessary mitigations to protect against potential exploitation.