PT-2026-44940 · Liboqs · Liboqs

Vishnu2707 · Published 2026-05-29 · Updated 2026-06-04 · CVE-2026-46344

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Name of the Vulnerable Software and Affected Versions liboqs versions prior to 0.16.0

Description An out-of-bounds read exists in the XMSS and XMSS^MT stateful signature verification code. This occurs when the verification function is called with a signature buffer sized for the declared algorithm, but the public key contains OID bytes (pk[0..3]) referencing a different XMSS parameter set with larger sig bytes. The implementation re-parses the OID within the xmss sign open() and xmssmt sign open() functions and uses the larger sig bytes value to index the signature buffer. The out-of-bounds bytes are used as input for an internal hash computation and are not returned to the caller, preventing data leakage. The primary impact is a potential denial of service via a process crash if the read accesses an unmapped memory page.

Recommendations Update to version 0.16.0.

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-46344

Affected Products

Liboqs

References · 5

• https://github.com/open-quantum-safe/liboqs/commit/077e32a94f39af02209dbbc680bf8a43b774b305 · Patch
• https://github.com/open-quantum-safe/liboqs/security/advisories/GHSA-2wxh-55qf-c7wg · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-46344 · Security Note
• https://t.me/cveNotify/166066 · Telegram Post
• https://twitter.com/CVEnew/status/2060470689010774431 · Twitter Post