CVE-2024-53107 is a vulnerability identified in the Linux kernel, specifically within the fs/proc/task_mmu subsystem. The issue arises in the function pagemap_scan_get_args(), where an integer overflow can occur due to improper handling of the 'arg->vec_len' variable. This variable is a 64-bit unsigned integer (u64) that originates from user input. The vulnerability manifests when the multiplication of 'arg->vec_len' by the size of the structure 'page_region' causes an integer wraparound, leading to an incorrect calculation of memory size. This can result in buffer overflows or memory corruption. The root cause is the lack of proper bounds checking and the use of unsafe arithmetic operations that do not account for potential overflow. The fix involves using safe arithmetic helper functions such as size_mul() and size_add() that operate on unsigned long types and include overflow checks. Additionally, on 32-bit systems, there is a need to ensure that 'arg->vec_len' fits within the size limits of unsigned long to prevent truncation or wraparound. This vulnerability could be exploited by a local attacker who can supply crafted input to the proc filesystem interface, potentially leading to privilege escalation or denial of service by corrupting kernel memory structures. No known exploits are currently reported in the wild, and no CVSS score has been assigned yet.

For European organizations, the impact of CVE-2024-53107 could be significant, especially for those relying heavily on Linux-based infrastructure, including servers, cloud environments, and embedded systems. Successful exploitation could allow attackers with local access to escalate privileges, compromise system integrity, or cause denial of service conditions. This is particularly critical for sectors such as finance, healthcare, government, and critical infrastructure, where Linux systems are prevalent and security breaches can lead to severe operational disruptions and data breaches. The vulnerability affects both 32-bit and 64-bit Linux systems, broadening the scope of potentially impacted devices. Given the widespread use of Linux in enterprise and cloud environments across Europe, unpatched systems could become targets for attackers aiming to gain unauthorized control or disrupt services. Although no active exploitation is reported, the presence of this vulnerability in the kernel's proc filesystem interface—a common attack vector—raises the risk profile if attackers develop exploits.

European organizations should prioritize patching Linux kernel versions affected by CVE-2024-53107 as soon as vendor updates become available. Until patches are applied, organizations should restrict local access to trusted users only, as exploitation requires local user privileges. Employing strict access controls and monitoring for unusual activity related to proc filesystem interactions can help detect attempted exploitation. Additionally, system administrators should audit and limit the use of unprivileged user namespaces and container environments that might expose the vulnerable interface. For 32-bit systems, consider upgrading to 64-bit architectures where feasible, as the vulnerability's impact is more pronounced on 32-bit due to size limitations. Implementing kernel hardening techniques such as SELinux or AppArmor policies to restrict access to procfs entries can further reduce risk. Regular vulnerability scanning and integrating kernel security updates into automated patch management workflows will help maintain a secure posture.