High
Security advisory
ARM mbed TLS before 2.1.11, before 2.7.2, and before 2.8.0 has a buffer over-read in ssl_parse_server_key_exchange() that could cause a crash on invalid input.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2018-9988
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 09:20 UTC · Revision 1
Source evidence
ARM mbed TLS before 2.1.11, before 2.7.2, and before 2.8.0 has a buffer over-read in ssl_parse_server_key_exchange() that could cause a crash on invalid input.
osv:CVE-2018-9988
Complete source record
{
"id": "20bd50be38d572c1ff4513fb6c82e1e03fb5ef3e56bee7994acf5872b72dc328",
"url": "https://osv.dev/vulnerability/CVE-2018-9988",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2018-9988",
"summary": "ARM mbed TLS before 2.1.11, before 2.7.2, and before 2.8.0 has a buffer over-read in ssl_parse_server_key_exchange() that could cause a crash on invalid input.",
"evidence": "osv:CVE-2018-9988",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2018-9988",
"aliases": [
"CVE-2018-9988"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/Mbed-TLS/mbedtls",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "1c986a9859f9456af999d16ba5056914669689fc"
},
{
"introduced": "32605dc83042d737e715a685e53176388d73540e"
},
{
"fixed": "9ae1fba869657bea7ec419412b1c26ed59eb7cd3"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "2.1.11"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "2.7.0"
},
{
"fixed": "2.7.2"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"mbedtls-2.7.0",
"mbedtls-2.7.2-rc1",
"mbedtls-2.1.11-rc1",
"mbedtls-2.7.1",
"mbedtls-2.1.10",
"mbedtls-2.1.9",
"mbedtls-2.1.9-rc1",
"mbedtls-2.1.8",
"mbedtls-2.1.6",
"mbedtls-2.1.5",
"mbedtls-2.1.4",
"mbedtls-2.1.3",
"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-2018-9988.json"
}
},
{
"ranges": [
{
"repo": "https://github.com/mbed-tls/mbedtls",
"type": "GIT",
"events": [
{
"introduced": "79a5e72719cb23daee6e0e55f7b85659bb3a89b8"
},
{
"last_affected": "79a5e72719cb23daee6e0e55f7b85659bb3a89b8"
},
{
"fixed": "027f84c69f4ef30c0693832a6c396ef19e563ca1"
},
{
"fixed": "a1098f81c252b317ad34ea978aea2bc47760b215"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:trustedfirmware:mbed_tls:2.8.0:rc1:*:*:*:*:*:*",
"range": [
{
"introduced": "2.8.0-rc1"
},
{
"last_affected": "2.8.0-rc1"
}
],
"source": "CPE_STRING"
},
{
"range": [
{
"fixed": "027f84c69f4ef30c0693832a6c396ef19e563ca1"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "a1098f81c252b317ad34ea978aea2bc47760b215"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
"2.8.0-rc1",
"mbedtls-2.8.0-rc1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-9988.json",
"vanir_signatures": [
{
"id": "CVE-2018-9988-43fb1513",
"digest": {
"threshold": 0.9,
"line_hashes": [
"233533454219406490390061696350408919024",
"56484956550389749533093667307607617125",
"40390773951587925798454177479524955136"
]
},
"source": "https://github.com/mbed-tls/mbedtls/commit/a1098f81c252b317ad34ea978aea2bc47760b215",
"target": {
"file": "library/ssl_cli.c"
},
"deprecated": false,
"signature_type": "Line",
"signature_version": "v1"
},
{
"id": "CVE-2018-9988-4d2fe0f3",
"digest": {
"threshold": 0.9,
"line_hashes": [
"40390773951587925798454177479524955136",
"233557313143411844596687656495997824922",
"139334063042468566397505368396940106530",
"229043678886504611548731213413437725144"
]
},
"source": "https://github.com/mbed-tls/mbedtls/commit/027f84c69f4ef30c0693832a6c396ef19e563ca1",
"target": {
"file": "library/ssl_cli.c"
},
"deprecated": false,
"signature_type": "Line",
"signature_version": "v1"
},
{
"id": "CVE-2018-9988-d3a3e59d",
"digest": {
"length": 8504,
"function_hash": "76443332738644645351952461628534168042"
},
"source": "https://github.com/mbed-tls/mbedtls/commit/a1098f81c252b317ad34ea978aea2bc47760b215",
"target": {
"file": "library/ssl_cli.c",
"function": "ssl_parse_server_key_exchange"
},
"deprecated": false,
"signature_type": "Function",
"signature_version": "v1"
},
{
"id": "CVE-2018-9988-d4de87ce",
"digest": {
"length": 8732,
"function_hash": "221937009738997935641169211938580408167"
},
"source": "https://github.com/mbed-tls/mbedtls/commit/027f84c69f4ef30c0693832a6c396ef19e563ca1",
"target": {
"file": "library/ssl_cli.c",
"function": "ssl_parse_server_key_exchange"
},
"deprecated": false,
"signature_type": "Function",
"signature_version": "v1"
}
],
"vanir_signatures_modified": "2026-10-24T14:12:23Z"
}
}
],
"modified": "2026-10-24T14:12:23.948577465Z",
"provider": "osv",
"references": [
"https://lists.debian.org/debian-lts-announce/2018/09/msg00029.html",
"https://lists.debian.org/debian-lts-announce/2021/11/msg00021.html",
"https://tls.mbed.org/tech-updates/releases/mbedtls-2.8.0-2.7.2-and-2.1.11-released",
"https://github.com/ARMmbed/mbedtls/commit/027f84c69f4ef30c0693832a6c396ef19e563ca1",
"https://github.com/ARMmbed/mbedtls/commit/a1098f81c252b317ad34ea978aea2bc47760b215"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "8.0"
},
{
"last_affected": "8.0"
},
{
"introduced": "9.0"
},
{
"last_affected": "9.0"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2018-9988",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 443401,
"published_at": "2018-04-10T19:29:00.26+00:00"
}