Compliance Impact

The vulnerability CVE-2026-3505 involves unbounded chunk size in the PGP AEAD implementation, leading to potential pre-authentication resource exhaustion and denial of service. The patch enforces strict chunk size validation to comply with RFC 9580 section 5.13.2, which specifies chunk size constraints for AEAD encrypted data packets.

However, there is no information provided in the available context or resources about how this vulnerability directly impacts compliance with common standards and regulations such as GDPR or HIPAA.

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Executive Summary

CVE-2026-3505 is a vulnerability in the Bouncy Castle Java cryptographic library (bc-java) affecting versions before 1.84. It involves an unbounded chunk size in the PGP AEAD (Authenticated Encryption with Associated Data) implementation. Specifically, the chunk size used during encryption and decryption is not properly limited or validated, which violates the constraints defined in RFC 9580.

This lack of validation allows an attacker to specify excessively large chunk sizes, leading to resource exhaustion before authentication occurs. The vulnerability is due to missing or insufficient checks on the chunk size parameter, which can cause the system to allocate excessive resources during processing.

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Impact Analysis

This vulnerability can be exploited by an attacker to cause pre-authentication resource exhaustion. Because the chunk size is unbounded, an attacker can send specially crafted PGP AEAD encrypted data packets with very large chunk sizes, causing the system to consume excessive memory or processing power.

The impact of this is a potential denial of service (DoS) condition, where legitimate users may be unable to use the affected system or application due to resource depletion caused by the attack.

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Detection Guidance

Detection of this vulnerability involves identifying usage of vulnerable versions of the Bouncy Castle Java library (bc-java) prior to version 1.84, specifically versions 1.74 through 1.83.

Since the vulnerability relates to unbounded PGP AEAD chunk sizes causing resource exhaustion, monitoring for unusually large or malformed AEAD encrypted data packets in network traffic or application logs may help detect exploitation attempts.

There are no specific commands provided in the available resources to detect this vulnerability directly on a system or network.

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Mitigation Strategies

The primary mitigation step is to upgrade the Bouncy Castle Java library (bc-java) to version 1.84 or later, where the vulnerability has been fixed by adding strict chunk size validation according to RFC 9580.

This update enforces chunk size limits and prevents resource exhaustion attacks caused by unbounded chunk sizes in PGP AEAD encrypted data packets.

Until the upgrade can be applied, consider monitoring and limiting resource usage related to PGP AEAD processing to reduce the risk of denial of service.

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