Service crash via oversized AEAD authentication tags
Published May 28, 2026 · Updated May 28, 2026
Stack buffer overflow in CryptX before 0.088_001 allows remote attackers to crash consuming applications via oversized AEAD tags. Four AEAD decrypt_verify XS helpers copy a caller-supplied tag into a fixed 144-byte stack buffer without first bounding its length. Exploitation requires consuming code to pass an attacker-controlled oversized tag to an affected helper, and the published impact is a service interrupt through a crash.
Summary
What happened
Stack buffer overflow in CryptX before 0.088_001 allows remote attackers to crash consuming applications via oversized AEAD tags. Four AEAD decrypt_verify XS helpers copy a caller-supplied tag into a fixed 144-byte stack buffer without first bounding its length. Exploitation requires consuming code to pass an attacker-controlled oversized tag to an affected helper, and the published impact is a service interrupt through a crash.
The record
- CVE
- CVE-2026-41565
- Published
- May 28, 2026
- Updated
- May 28, 2026
- Vendor
- DCIT, a.s.
- Product
- CryptX
- Classifications
- CWE-121, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 28, 2026CVE publishedPublication date reported by the CVE source.
- May 28, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <0.088_001
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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