CVE-2025-69652 affects GNU Binutils, specifically the readelf utility through version 2.46. The vulnerability stems from improper handling of malformed DWARF debugging information embedded in ELF binaries. The root cause is incomplete cleanup of internal state (debug_info_p) in the process_debug_info() function, which leads to invalid state being passed into DWARF attribute parsing routines. When these routines encounter certain malformed attributes with an unexpected zero data length, the byte_get_little_endian() function triggers a fatal abort, causing the readelf process to terminate unexpectedly with a SIGABRT signal. This behavior results in a denial of service condition. Importantly, no memory corruption or arbitrary code execution has been observed, indicating the vulnerability does not allow for privilege escalation or remote code execution. The attack vector requires an attacker to supply a crafted ELF file and have it processed by readelf, which typically implies local or controlled environment exploitation. The vulnerability is tracked under CWE-460 (Improper Cleanup). The CVSS v3.1 base score is 6.2, reflecting a medium severity with local attack vector, low complexity, no privileges required, no user interaction, and impact limited to availability. No patches or fixes have been linked yet, and no known exploits have been reported in the wild as of the publication date.

The primary impact of CVE-2025-69652 is denial of service against systems or users relying on GNU Binutils readelf for ELF binary inspection or debugging. This can disrupt development, debugging, or automated analysis pipelines that process ELF files, especially in environments where untrusted or potentially malicious ELF files are analyzed. While the vulnerability does not allow code execution or data compromise, the denial of service could be leveraged to interrupt build systems, continuous integration workflows, or forensic investigations. Organizations with automated ELF processing tools or security scanners that invoke readelf may experience service interruptions or require manual intervention. The impact is localized to the availability of the readelf utility and does not extend to broader system compromise. Since exploitation requires local access or the ability to supply crafted ELF files for processing, remote exploitation is unlikely without additional vulnerabilities. However, in environments where ELF files are received from untrusted sources, such as software supply chains or shared development environments, the risk of denial of service is heightened.

To mitigate CVE-2025-69652, organizations should: 1) Avoid processing untrusted or unauthenticated ELF binaries with vulnerable versions of readelf; 2) Implement strict validation and sandboxing of ELF files before analysis to prevent malformed inputs from reaching readelf; 3) Monitor for and apply official patches or updates from GNU Binutils maintainers as soon as they become available; 4) Consider using alternative tools or updated versions of readelf that have addressed this vulnerability; 5) Integrate input sanitization and integrity checks in automated pipelines that handle ELF files to detect malformed debug information early; 6) Employ runtime protections such as process isolation or containerization when running readelf to limit the impact of potential crashes; 7) Maintain up-to-date inventories of tooling versions to quickly identify vulnerable deployments; 8) Educate developers and analysts about the risks of processing untrusted ELF files and encourage cautious handling; 9) If possible, implement monitoring to detect abnormal termination of readelf processes to enable rapid response; 10) For critical environments, consider disabling debug info processing if feasible or using custom parsing logic that is resilient to malformed DWARF data.