CVE-2025-67897: RUSTSEC-2025-0136 - Underflow in aes_key_unwrap function

CVE-2025-67897 · Severity: medium · CVSS 5.3 · Published 2025-12-14

In Sequoia before 2.1.0, aes_key_unwrap panics if passed a ciphertext that is too short. A remote attacker can take advantage of this issue to crash an application by sending a victim an encrypted message with a crafted PKESK or SKESK packet.

Technologies: sequoia-openpgp (crates.io). Vendors: crates.io.

Quick answers

Is CVE-2025-67897 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-67897 being exploited in the wild.
How severe is CVE-2025-67897?
Medium severity, with a CVSS score of 5.3, published 14 December 2025.
Which products and versions are affected?
sequoia-openpgp (crates.io) SEMVER:introduced=0,fixed=2.1.0, SEMVER:introduced=0.0.0-0,fixed=2.1.0.
Is there a fix for CVE-2025-67897?
Yes. sequoia-openpgp (crates.io): upgrade to 2.1.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-67897?
Check whether you run sequoia-openpgp (crates.io) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • sequoia-openpgp (crates.io): upgrade to 2.1.0 or later
    cargo update -p sequoia-openpgp

Affected products

  • sequoia-openpgp (crates.io) SEMVER:introduced=0,fixed=2.1.0, SEMVER:introduced=0.0.0-0,fixed=2.1.0

Identifiers

  • CVE-2025-67897
  • GHSA-v6x3-9r38-r27q
  • RUSTSEC-2025-0136

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