CVE-2026-10512

The X25519 x86_64 assembly implementation fails to clear the most significant bit during the final modular reduction, so the computed result may not be fully reduced modulo the field prime 2^255 - 19. This can leave the field element in a non-canonical form, producing an incorrect result from the scalar multiplication and potentially a wrong shared secret. The final carry-propagation chains in the x64 and AVX2 reduction routines could overflow into the top bit, and the high limb was not masked afterward, so the 255-bit field element was left non-canonical.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10512.json",
    "cwe_ids": [
        "CWE-682"
    ],
    "cna_assigner": "wolfSSL"
}

References

Affected packages

Git / github.com/wolfssl/wolfssl

Affected ranges

Type

GIT

Repo

https://github.com/wolfssl/wolfssl

Events

Introduced

37884f864d6fd9b04f44677cb04da15d0c9d6526

Fixed

ac01707f552c611fbd135cc723b2682b3e7f80f2

Database specific

{
    "extracted_events": [
        {
            "introduced": "5.6.4"
        },
        {
            "last_affected": "5.9.1"
        },
        {
            "fixed": "5.9.2"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ],
    "cpe": "cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*"
}

Affected versions

v5.*

v5.2.1

v5.6.4-stable

v5.6.6-stable

v5.7.0-stable

v5.7.2-stable

v5.7.4-stable

v5.7.6-stable

v5.8.0-stable

v5.8.2-stable

v5.8.4-stable

v5.9.0-stable

v5.9.1-stable

Other

wolfEntropy1

wolfEntropy2d

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-10512.json"