High
Security advisory
In Mbed TLS before 3.1.0, psa_aead_generate_nonce allows policy bypass or oracle-based decryption when the output buffer is at memory locations accessible to an untrusted application.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-45451
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 12:02 UTC · Revision 1
Source evidence
In Mbed TLS before 3.1.0, psa_aead_generate_nonce allows policy bypass or oracle-based decryption when the output buffer is at memory locations accessible to an untrusted application.
osv:CVE-2021-45451
Complete source record
{
"id": "96c9672c15e9d5e3ce6613a724c876c10aa481aa2d0f4d858cf00e272aac3328",
"url": "https://osv.dev/vulnerability/CVE-2021-45451",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-45451",
"summary": "In Mbed TLS before 3.1.0, psa_aead_generate_nonce allows policy bypass or oracle-based decryption when the output buffer is at memory locations accessible to an untrusted application.",
"evidence": "osv:CVE-2021-45451",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2021-45451",
"aliases": [
"CVE-2021-45451"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/Mbed-TLS/mbedtls",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "d65aeb37349ad1a50e0f6c9b694d4b5290d60e49"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "3.1.0"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v2.26.0",
"mbedtls-2.26.0",
"v2.24.0",
"mbedtls-2.24.0",
"mbedtls-2.19.1",
"mbedtls-2.22.0d0",
"mbedtls-2.21.0",
"mbedtls-2.20.0",
"mbedtls-2.20.0d0",
"mbedtls-2.19.0d2",
"mbedtls-2.19.0",
"mbedtls-2.19.0d1",
"mbedtls-2.16.0",
"mbedtls-2.14.0",
"mbedtls-2.13.1",
"mbedtls-2.13.0",
"mbedtls-2.12.0",
"mbedtls-2.11.0",
"mbedtls-2.10.0",
"mbedtls-2.7.0",
"mbedtls-2.9.0",
"mbedtls-2.8.0",
"mbedtls-2.8.0-rc1",
"mbedtls-2.7.0-rc1",
"mbedtls-2.6.0",
"mbedtls-2.6.0-rc1",
"mbedtls-2.5.1",
"mbedtls-2.5.0",
"mbedtls-2.4.0",
"mbedtls-2.2.1",
"yotta-2.3.1",
"mbedtls-2.3.0",
"mbedtls-2.2.0",
"mbedos-release-15-11",
"mbedos-techcon-oob2",
"mbedtls-2.1.2",
"mbedtls-2.1.0",
"mbedtls-2.1.1",
"beta-oob-2",
"mbedtls-2.0.0",
"polarssl-1.3.9",
"polarssl-1.3.8",
"polarssl-1.3.7",
"polarssl-1.3.6",
"polarssl-1.3.5",
"polarssl-1.3.4",
"polarssl-1.3.3",
"polarssl-1.3.2",
"polarssl-1.3.1",
"polarssl-1.3.0",
"polarssl-1.3.0-rc0",
"polarssl-1.2.6",
"polarssl-1.2.5",
"polarssl-1.2.4",
"polarssl-1.2.2",
"polarssl-1.2.1",
"polarssl-1.2.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-45451.json"
}
},
{
"ranges": [
{
"repo": "https://github.com/mbed-tls/mbedtls",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "d65aeb37349ad1a50e0f6c9b694d4b5290d60e49"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"fixed": "d65aeb37349ad1a50e0f6c9b694d4b5290d60e49"
}
],
"source": "REFERENCES_TAG",
"original_tag": "v3.1.0"
}
]
}
}
],
"versions": [
"v2.26.0",
"mbedtls-2.26.0",
"v2.24.0",
"mbedtls-2.24.0",
"mbedtls-2.19.1",
"mbedtls-2.22.0d0",
"mbedtls-2.21.0",
"mbedtls-2.20.0",
"mbedtls-2.20.0d0",
"mbedtls-2.19.0d2",
"mbedtls-2.19.0",
"mbedtls-2.19.0d1",
"mbedtls-2.16.0",
"mbedtls-2.14.0",
"mbedtls-2.13.1",
"mbedtls-2.13.0",
"mbedtls-2.12.0",
"mbedtls-2.11.0",
"mbedtls-2.10.0",
"mbedtls-2.7.0",
"mbedtls-2.9.0",
"mbedtls-2.8.0",
"mbedtls-2.8.0-rc1",
"mbedtls-2.7.0-rc1",
"mbedtls-2.6.0",
"mbedtls-2.6.0-rc1",
"mbedtls-2.5.1",
"mbedtls-2.5.0",
"mbedtls-2.4.0",
"mbedtls-2.2.1",
"yotta-2.3.1",
"mbedtls-2.3.0",
"mbedtls-2.2.0",
"mbedos-release-15-11",
"mbedos-techcon-oob2",
"mbedtls-2.1.2",
"mbedtls-2.1.0",
"mbedtls-2.1.1",
"beta-oob-2",
"mbedtls-2.0.0",
"polarssl-1.3.9",
"polarssl-1.3.8",
"polarssl-1.3.7",
"polarssl-1.3.6",
"polarssl-1.3.5",
"polarssl-1.3.4",
"polarssl-1.3.3",
"polarssl-1.3.2",
"polarssl-1.3.1",
"polarssl-1.3.0",
"polarssl-1.3.0-rc0",
"polarssl-1.2.6",
"polarssl-1.2.5",
"polarssl-1.2.4",
"polarssl-1.2.2",
"polarssl-1.2.1",
"polarssl-1.2.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-45451.json"
}
}
],
"modified": "2026-10-20T10:55:07.623074367Z",
"provider": "osv",
"references": [
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IL66WKJGXY5AXMTFE7QDMGL3RIBD6PX5/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TALJHOYAYSUJTLN6BYGLO4YJGNZUY74W/",
"https://github.com/ARMmbed/mbedtls/releases/tag/v3.1.0"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*",
"cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:fedora",
"extracted_events": [
{
"range": [
{
"introduced": "36"
},
{
"last_affected": "36"
},
{
"introduced": "37"
},
{
"last_affected": "37"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2021-45451",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 386933,
"published_at": "2021-12-21T07:15:06.86+00:00"
}