Critical
Security advisory
RsaPad_PSS in wolfcrypt/src/rsa.c in wolfSSL before 4.6.0 has an out-of-bounds write for certain relationships between key size and digest size.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-36177
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 12:41 UTC · Revision 1
Source evidence
RsaPad_PSS in wolfcrypt/src/rsa.c in wolfSSL before 4.6.0 has an out-of-bounds write for certain relationships between key size and digest size.
osv:CVE-2020-36177
Complete source record
{
"id": "666d38786e6065d1be8161d93bac8da43eae5d1439cc64de373914f8454ad908",
"url": "https://osv.dev/vulnerability/CVE-2020-36177",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-36177",
"summary": "RsaPad_PSS in wolfcrypt/src/rsa.c in wolfSSL before 4.6.0 has an out-of-bounds write for certain relationships between key size and digest size.",
"evidence": "osv:CVE-2020-36177",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2020-36177",
"aliases": [
"CVE-2020-36177"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/wolfssl/wolfssl",
"type": "GIT",
"events": [
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{
"fixed": "9c87f979a7f1d3a6d786b260653d566c1d31a1c4"
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{
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{
"fixed": "fb2288c46dd4c864b78f00a47a364b96a09a5c0f"
}
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"database_specific": {
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{
"cpe": "cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*",
"range": [
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{
"fixed": "4.6.0"
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],
"source": "CPE_RANGE"
},
{
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"source": "REFERENCES_COMMIT"
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{
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"source": "REFERENCES_COMMIT"
},
{
"range": [
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}
],
"source": "REFERENCES_TAG",
"original_tag": "v4.6.0-stable"
}
]
}
}
],
"versions": [
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"v4.4.0-stable",
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"v3.12.0-stable",
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"v2.7.2",
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"v2.4.7",
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-36177.json",
"vanir_signatures": [
{
"id": "CVE-2020-36177-03c1f61b",
"digest": {
"length": 3081,
"function_hash": "264827503117103137381520981783684502268"
},
"source": "https://github.com/wolfssl/wolfssl/commit/fb2288c46dd4c864b78f00a47a364b96a09a5c0f",
"target": {
"file": "wolfcrypt/src/rsa.c",
"function": "RsaPad_PSS"
},
"deprecated": false,
"signature_type": "Function",
"signature_version": "v1"
},
{
"id": "CVE-2020-36177-adf7e918",
"digest": {
"threshold": 0.9,
"line_hashes": [
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"123195831299163795745100102789505259996",
"309197391360104330999440084668058661684",
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"259562928944948835646167924459328588964",
"287813323524317699182752393365196798478",
"322024080002241617975419750365199625970",
"41941024797507571717993383206268874663",
"146733773366898157865344531513444698049",
"241161486851679814673571446896303206491",
"331787621892583087312045700383027127388",
"318152332990762196055583516693558984668",
"122476733053937695029843239693435363133",
"130769971250333428400709323991852545009",
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"155768245028890335374704626374571268873",
"123065967750714728483204853449574795461",
"4165696885982239691162648787916102708",
"106384731890444553251747088636781840227",
"118449229286489254222740503918275919187",
"12804832652334037016008962743515846191",
"311334367273864107559091901172400196359",
"111505162837627812298630060997139385864",
"275283786168184748658947656770546945395",
"141825205460509034935881322110166488814"
]
},
"source": "https://github.com/wolfssl/wolfssl/commit/fb2288c46dd4c864b78f00a47a364b96a09a5c0f",
"target": {
"file": "wolfcrypt/src/rsa.c"
},
"deprecated": false,
"signature_type": "Line",
"signature_version": "v1"
}
],
"vanir_signatures_modified": "2026-10-20T14:12:20Z"
}
}
],
"modified": "2026-10-20T14:12:20.655584889Z",
"provider": "osv",
"references": [
"https://github.com/wolfSSL/wolfssl/releases/tag/v4.6.0-stable",
"https://github.com/wolfSSL/wolfssl/commit/63bf5dc56ccbfc12a73b06327361687091a4c6f7",
"https://github.com/wolfSSL/wolfssl/commit/fb2288c46dd4c864b78f00a47a364b96a09a5c0f",
"https://github.com/wolfSSL/wolfssl/pull/3426",
"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26567"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2020-36177",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 388712,
"published_at": "2021-01-06T16:15:12.44+00:00"
}