Memory Corruption Vulnerability in 7-Zip by RAR5 Handler

CVE-2025-53816

What is CVE-2025-53816?

CVE-2025-53816 is a memory corruption vulnerability found in the 7-Zip file archiver, specifically related to the RAR5 file format handler. 7-Zip is widely used for file compression and archiving, known for its high compression ratios. This vulnerability occurs due to a flaw that allows zeroes to be written outside of the heap buffer during the processing of RAR5 files. If exploited, this can lead to memory corruption issues, potentially resulting in a denial of service. The vulnerability affects versions of 7-Zip prior to 25.0.0, which contains the necessary fix. Organizations using earlier versions of this software could face significant disruptions, including crashes or unexpected behavior within their applications relying on 7-Zip for file handling.

Potential impact of CVE-2025-53816

1. Denial of Service: The primary impact of this vulnerability is the potential for denial of service (DoS) attacks, which could disrupt operations and services that depend on 7-Zip for file management and compression tasks, leading to downtime and loss of productivity.

2. Data Integrity Issues: Memory corruption may lead to data corruption when handling RAR5 files, risking the integrity of critical files and archives, which can result in data loss or compromised data reliability.

3. Reputational Damage: Organizations may suffer reputational harm if they experience disruptions or data integrity issues due to this vulnerability, especially if client data or services are impacted, leading to loss of customer trust and potential financial repercussions.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch →

References