Medium
Security advisory
In radare2 prior to 3.1.1, the parseOperand function inside libr/asm/p/asm_x86_nz.c may allow attackers to cause a denial of service (application crash in libr/util/strbuf.c via a stack-based buffer over-read) by crafting an input file, a related issue to CVE-2018-20455.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2018-20456
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 12:13 UTC · Revision 1
Source evidence
In radare2 prior to 3.1.1, the parseOperand function inside libr/asm/p/asm_x86_nz.c may allow attackers to cause a denial of service (application crash in libr/util/strbuf.c via a stack-based buffer over-read) by crafting an input file, a related issue to CVE-2018-20455.
osv:CVE-2018-20456
Complete source record
{
"id": "e041be9d8b8733c2920b38f3dfcfb04348a3804676c708b6afff18dc3778cee4",
"url": "https://osv.dev/vulnerability/CVE-2018-20456",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2018-20456",
"summary": "In radare2 prior to 3.1.1, the parseOperand function inside libr/asm/p/asm_x86_nz.c may allow attackers to cause a denial of service (application crash in libr/util/strbuf.c via a stack-based buffer over-read) by crafting an input file, a related issue to CVE-2018-20455.",
"evidence": "osv:CVE-2018-20456",
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"severity": "medium",
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"score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
}
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"affected": [
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"type": "GIT",
"events": [
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{
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{
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"range": [
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{
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"source": "CPE_RANGE"
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{
"range": [
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"versions": [
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],
"database_specific": {
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"vanir_signatures": [
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"digest": {
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"source": "https://github.com/radareorg/radare2/commit/9b46d38dd3c4de6048a488b655c7319f845af185",
"target": {
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"source": "https://github.com/radareorg/radare2/commit/9b46d38dd3c4de6048a488b655c7319f845af185",
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"function": "parseOperand"
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"source": "https://github.com/radareorg/radare2/commit/b143e1b1b5622ef2f41a90f4c0f7ed4c477caf40",
"target": {
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"function": "r_buf_read_string"
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{
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"source": "https://github.com/radareorg/radare2/commit/b143e1b1b5622ef2f41a90f4c0f7ed4c477caf40",
"target": {
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"vanir_signatures_modified": "2026-10-20T13:21:52Z"
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],
"modified": "2026-10-20T13:21:52.267037658Z",
"provider": "osv",
"references": [
"https://github.com/radare/radare2/commit/9b46d38dd3c4de6048a488b655c7319f845af185",
"https://github.com/radare/radare2/issues/12372"
],
"provider_metadata": {}
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"related_cves": [
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"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 387567,
"published_at": "2018-12-25T19:29:00.29+00:00"
}