High
nasm — security advisory
A heap buffer overflow vulnerability exists in the Netwide Assembler (NASM) due to a lack of bounds checking in the obj_directive() function. This vulnerability can be exploited by a user assembling a malicious .asm file, potentially leading to heap memory corruption, denial of service (crash), and arbitrary code execution.
- Products
- nasm
- Affected versions
- 2.11.06-1really2.11.05-1, 2.11.08-1, 2.11.08-1ubuntu0.1, 2.13.01-2, 2.13.02-0.1, 2.14.02-1, 2.15.05-1, 2.15.05-1ubuntu0.1~esm1, 2.15.05-1ubuntu0.1~esm2, 2.16.01-1, 2.16.01-1build1, 2.16.01-1ubuntu0.1~esm1, 2.16.01-1ubuntu0.1~esm2, 2.16.03-1, 3.01-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-6067
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:43 UTC · Revision 1
Source evidence
A heap buffer overflow vulnerability exists in the Netwide Assembler (NASM) due to a lack of bounds checking in the obj_directive() function. This vulnerability can be exploited by a user assembling a malicious .asm file, potentially leading to heap memory corruption, denial of service (crash), and arbitrary code execution.
osv:UBUNTU-CVE-2026-6067
nasm
Fixed versions: Not specified
nasm
Fixed versions: Not specified
nasm
Fixed versions: Not specified
nasm
Fixed versions: Not specified
nasm
Fixed versions: Not specified
nasm
Fixed versions: Not specified
nasm
Fixed versions: Not specified
nasm
Fixed versions: Not specified
Complete source record
{
"id": "ae705d90adad281c1ecc7b68a0e26ed8e4e09dde5131ffbaf5f32061d11c1dce",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-6067",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-6067",
"summary": "A heap buffer overflow vulnerability exists in the Netwide Assembler (NASM) due to a lack of bounds checking in the obj_directive() function. This vulnerability can be exploited by a user assembling a malicious .asm file, potentially leading to heap memory corruption, denial of service (crash), and arbitrary code execution.",
"evidence": "osv:UBUNTU-CVE-2026-6067",
"products": [
{
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"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.11.06-1really2.11.05-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.11.08-1",
"evidence": "/affected/0/versions"
},
{
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"evidence": "/affected/0/versions"
}
]
},
{
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},
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"affected_versions": [
{
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},
{
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{
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"evidence": "/affected/3/versions"
},
{
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"evidence": "/affected/3/versions"
},
{
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{
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{
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"evidence": "/affected/4/versions"
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{
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{
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},
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{
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},
{
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},
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"affected_versions": [
{
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{
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"evidence": "/affected/7/package/name"
},
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"affected_versions": [
{
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"evidence": "/affected/7/versions"
},
{
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}
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}
],
"severity": "high",
"structured": {
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"aliases": [
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],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
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"events": [
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}
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}
],
"package": {
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},
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"2.11.08-1ubuntu0.1"
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},
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}
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},
{
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"package": {
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"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
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"2.13.02-0.1"
],
"database_specific": {
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},
"ecosystem_specific": {
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},
{
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},
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],
"database_specific": {
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},
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"2.15.05-1ubuntu0.1~esm2"
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"ecosystem_specific": {
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},
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],
"modified": "2026-10-17T12:56:00.392633470Z",
"provider": "osv",
"upstream": [
"CVE-2026-6067"
],
"references": [
"https://ubuntu.com/security/CVE-2026-6067",
"https://www.cve.org/CVERecord?id=CVE-2026-6067",
"https://github.com/netwide-assembler/nasm/issues/203"
]
},
"related_cves": [
{
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"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 354535,
"published_at": "2026-04-10T14:16:00+00:00"
}