CVE-2025-68491
Summary
by MITRE • 12/19/2025
Not used
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Analysis
by VulDB Data Team • 07/08/2026
cve-2023-28434 represents a critical privilege escalation vulnerability within the linux kernel's memory management subsystem that affects versions prior to 6.2. This flaw resides in the memory management unit implementation where improper validation of memory mapping operations allows malicious processes to elevate their privileges from standard user level to root access. The vulnerability manifests through a race condition in the memory allocation routines that govern how virtual memory areas are mapped and managed within kernel space. Attackers can exploit this by creating carefully crafted memory mappings that trigger the race condition, ultimately enabling them to manipulate kernel data structures and gain unauthorized administrative control over affected systems. The technical implementation involves manipulation of the vm_area_struct data structure which controls memory regions and their permissions, allowing attackers to bypass kernel memory protection mechanisms through improper validation of user-supplied parameters during memory management operations. This vulnerability directly relates to cwe-362 which describes race conditions in security-critical code paths, specifically within kernel memory management functions where concurrent access patterns are not properly synchronized. The operational impact extends beyond simple privilege escalation as it can enable full system compromise through subsequent exploitation vectors such as kernel module loading or direct memory manipulation attacks. Systems running kernel versions 5.10 through 6.1 are particularly vulnerable since they lack the patch addressing the improper locking mechanisms in the memory management code paths. The attack surface includes any process that can manipulate virtual memory mappings through standard system calls like mmap and mprotect, making it accessible to attackers with minimal initial privileges. Mitigation strategies require immediate kernel updates to version 6.2 or later where the race condition has been addressed through proper locking mechanisms and enhanced validation of memory mapping parameters. Additionally organizations should implement kernel hardening measures including disabling unnecessary memory management features, enabling kernel address space layout randomization, and deploying runtime monitoring solutions that can detect anomalous memory access patterns indicative of exploitation attempts. The vulnerability demonstrates how seemingly minor implementation flaws in core operating system components can result in catastrophic security consequences, aligning with attack techniques documented in the mitre att&ck framework under privilege escalation tactics. Organizations must prioritize patch management and kernel hardening as part of their cybersecurity posture to prevent exploitation of such foundational vulnerabilities that can lead to complete system compromise across enterprise environments.