A significant vulnerability has been found in the Linux kernel's netfilter subsystem. Specifically, the bug affects the ipset bitmap implementation, which is used for efficient IP address filtering. The bug, CVE-2024-53141, allows local users to gain elevated privileges, which can lead to root privileges on the systems affected. The bug exists in kernel versions through and including 6.12.2 and has been remedied by the Linux community in patch commit 35f56c554eb1b56b77b3cf197a6b00922d49033d. The bug is the result of an out-of-bounds write condition that occurs when processing certain IP address configurations in CIDR notation, thus allowing attackers to manipulate kernel memory structures. The root cause of the vulnerability lies in insufficient input validation in the bitmap_ip_uadt function, a core component of the ipset subsystem. When a CIDR range is provided without an associated upper IP boundary (IP_TO), the system computes memory positions without verifying whether they fall within the valid limits of the bitmap structure. Attackers can utilize this vulnerability by creating special IPset setups that cause an integer underflow, leading to arbitrary memory writes in kernel space. Due to the nature of Netfilter being widely used in container setups and security appliances, the resulting threat is amplified in multi-user setups. In order to reduce the vulnerability, system administrators should strongly apply the official patch as soon as possible by updating to a kernel that includes the patch. Where timely patching is not possible, restricting access to netfilter capabilities and closely monitoring related system activity is recommended, as these actions can help to decrease exposure. The patch provided proper IP range checks in bitmap sets to remove this security flaw.
Security researchers have confirmed active exploitation of CVE-2026-46817, a critical vulnerability affecting Oracle E-Business Suite (EBS). The flaw exists in the File Transmissio...
Google Threat Intelligence has uncovered STOCKSTAY, an advanced backdoor associated with the Russia-linked Turla advanced persistent threat (APT) group. Designed to support prolong...
Cybersecurity firm Infoblox has uncovered a massive network of more than 236,000 fraudulent websites built using templates based on DCloud Uni App, a legitimate Chinese open source...