Compilers undermine cryptographic software security

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February 10, 2026 at 8:59 PM

Overview

Researchers have identified vulnerabilities in compilers, particularly GCC, that can compromise the security of cryptographic software. The issue arises from how these compilers optimize code, potentially undoing constant-time implementations that are designed to prevent timing attacks. Timing attacks allow attackers to infer sensitive information, like passwords, based on how long it takes a system to respond to requests. This is a significant concern for developers of cryptographic software who rely on constant-time operations to secure user data. Companies that use GCC for their software development should be aware of these vulnerabilities and consider reviewing their code to ensure it remains secure against timing analysis attacks.

Key Takeaways

Affected Systems: GCC compiler, cryptographic software
Action Required: Developers should review their code for constant-time implementations and consider using alternative compilers or settings that preserve timing consistency.
Timeline: Newly disclosed

Original Article Summary

Meusel detailed how compilers, particularly GCC, can undo constant-time implementations designed to equalize response times and prevent attackers from inferring password information through timing analysis.

Impact

GCC compiler, cryptographic software

Exploitation Status

The exploitation status is currently unknown. Monitor vendor advisories and security bulletins for updates.

Timeline

Newly disclosed

Remediation

Developers should review their code for constant-time implementations and consider using alternative compilers or settings that preserve timing consistency.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

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