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CVE-2025-67897

Sequoia: Sequoia: Application crash via crafted encrypted message

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Severity

Moderate

Red Hat Product Security

5.3

CVSS 3.1

Review impact separately from score.

Published · December 14, 2025

Updated · August 23, 2026

Description

A flaw was found in Sequoia. This vulnerability allows a remote attacker to crash an application via sending a victim an encrypted message with a crafted Public Key Encrypted Session Key (PKESK) or Symmetric Key Encrypted Session Key (SKESK) packet, which causes aes_key_unwrap to panic when processing a short ciphertext.

Statement

This vulnerability is rated Moderate for Red Hat. A remote attacker could crash an application using Sequoia by sending a specially crafted encrypted message. Successful exploitation requires high attack complexity and user interaction, as the victim must process the malicious message.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

CVSS / CWE

CVSS 3.1 · 5.3
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H

CWE-195 · Signed to Unsigned Conversion Error