openssl_encrypt before 1.4.9 fails to validate KDF cost parameters in encrypted file metadata and keystore headers, allowing attackers to trigger unbounded memory allocation. Attackers can craft malicious encrypted files declaring arbitrarily large Argon2, scrypt, or balloon KDF parameters to exhaust system memory and crash the process without authentication.
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History
Thu, 27 Aug 2026 16:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | openssl_encrypt before 1.4.9 fails to validate KDF cost parameters in encrypted file metadata and keystore headers, allowing attackers to trigger unbounded memory allocation. Attackers can craft malicious encrypted files declaring arbitrarily large Argon2, scrypt, or balloon KDF parameters to exhaust system memory and crash the process without authentication. | |
| Title | openssl_encrypt before 1.4.9 Denial of Service via KDF | |
| Weaknesses | CWE-400 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-08-27T19:28:47.802Z
Reserved: 2026-08-27T11:13:14.063Z
Link: CVE-2026-81721
No data.
Status : Received
Published: 2026-08-27T17:21:02.650
Modified: 2026-08-27T17:21:02.650
Link: CVE-2026-81721
No data.
OpenCVE Enrichment
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Weaknesses