High
Heap-based Buffer Overflow in Wireshark
Type: advisorySources: OSV
C12.22 protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-76886
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 01:42 UTC · Revision 1
Source evidence
C12.22 protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
osv:CVE-2026-76886
Complete source record
{
"id": "09e8f47a6323f1d36f105d82e7430a0ecb1dd58b51ba6a48abe36ddd87e6ac75",
"url": "https://osv.dev/vulnerability/CVE-2026-76886",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Heap-based Buffer Overflow in Wireshark",
"summary": "C12.22 protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service",
"evidence": "osv:CVE-2026-76886",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-76886",
"aliases": [
"CVE-2026-76886"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/wireshark/wireshark",
"type": "GIT",
"events": [
{
"introduced": "009a163470b581c7d3ee66d89c819cef1f9e50fe"
},
{
"fixed": "b6c99a3f2a1aecf7926e7e64a94488b2bd071571"
},
{
"introduced": "cdfb6721e77c19d43f4787f66e9d5f2525281a22"
},
{
"fixed": "e677bf052328efc1ed897a547fa161836a0e4ff7"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.18"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.6.0"
},
{
"fixed": "4.6.8"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v4.4.18rc0",
"v4.6.8rc0",
"v4.4.17",
"v4.6.7",
"v4.4.17rc0",
"v4.6.16",
"v4.4.16",
"v4.6.6",
"v4.6.6rc0",
"v4.4.16rc0",
"v4.4.15",
"v4.6.5",
"v4.4.15rc0",
"v4.6.5rc0",
"v4.4.14",
"v4.6.4",
"v4.4.14rc0",
"v4.6.4rc0",
"v4.4.13",
"v4.6.3",
"v4.4.13rc0",
"v4.4.12",
"v4.6.3rc0",
"v4.6.2",
"v4.4.12rc0",
"v4.6.2rc0",
"v4.4.11",
"v4.6.1",
"v4.4.11rc0",
"v4.6.1rc0",
"v4.4.10",
"v4.6.0",
"v4.4.10rc0",
"wireshark-4.4.9",
"v4.4.9",
"v4.4.9rc0",
"wireshark-4.4.8",
"v4.4.8",
"v4.4.8rc0",
"wireshark-4.4.7",
"v4.4.7",
"v4.6.7rc0",
"v4.4.7rc0",
"wireshark-4.4.6",
"v4.4.6",
"v4.4.6rc0",
"wireshark-4.4.5",
"v4.4.5",
"v4.4.5rc0",
"wireshark-4.4.4",
"v4.4.4",
"v4.4.4rc0",
"wireshark-4.4.3",
"v4.4.3",
"v4.4.3rc0",
"wireshark-4.4.2",
"v4.4.2",
"v4.4.2rc0",
"wireshark-4.4.1",
"v4.4.1",
"v4.4.1rc0",
"wireshark-4.4.0",
"v4.4.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-76886.json"
}
},
{
"ranges": [
{
"repo": "https://gitlab.com/wireshark/wireshark",
"type": "GIT",
"events": [
{
"introduced": "009a163470b581c7d3ee66d89c819cef1f9e50fe"
},
{
"fixed": "b6c99a3f2a1aecf7926e7e64a94488b2bd071571"
},
{
"introduced": "cdfb6721e77c19d43f4787f66e9d5f2525281a22"
},
{
"fixed": "e677bf052328efc1ed897a547fa161836a0e4ff7"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.18"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.6.0"
},
{
"fixed": "4.6.8"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v4.4.18rc0",
"v4.6.8rc0",
"v4.4.17",
"v4.6.7",
"v4.4.17rc0",
"v4.6.7rc0",
"v4.4.16",
"v4.6.6",
"v4.6.6rc0",
"v4.4.16rc0",
"v4.4.15",
"v4.6.5",
"v4.4.15rc0",
"v4.6.5rc0",
"v4.4.14",
"v4.6.4",
"v4.4.14rc0",
"v4.6.4rc0",
"v4.4.13",
"v4.6.3",
"v4.4.13rc0",
"v4.4.12",
"v4.6.3rc0",
"v4.6.2",
"v4.4.12rc0",
"v4.6.2rc0",
"v4.4.11",
"v4.6.1",
"v4.4.11rc0",
"v4.6.1rc0",
"v4.4.10",
"v4.6.0",
"v4.4.10rc0",
"wireshark-4.4.9",
"v4.4.9",
"v4.4.9rc0",
"wireshark-4.4.8",
"v4.4.8",
"v4.4.8rc0",
"wireshark-4.4.7",
"v4.4.7",
"v4.4.7rc0",
"wireshark-4.4.6",
"v4.4.6",
"v4.4.6rc0",
"wireshark-4.4.5",
"v4.4.5",
"v4.4.5rc0",
"wireshark-4.4.4",
"v4.4.4",
"v4.4.4rc0",
"wireshark-4.4.3",
"v4.4.3",
"v4.4.3rc0",
"wireshark-4.4.2",
"v4.4.2",
"v4.4.2rc0",
"wireshark-4.4.1",
"v4.4.1",
"v4.4.1rc0",
"wireshark-4.4.0",
"v4.4.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-76886.json"
}
}
],
"modified": "2026-10-28T02:30:48.548681964Z",
"provider": "osv",
"references": [
"https://gitlab.com/wireshark/wireshark/-/work_items/21439",
"https://www.wireshark.org/security/wnpa-sec-2026-75.html",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76886.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-76886",
"https://gitlab.com/wireshark/wireshark/-/work_items/21446"
],
"provider_metadata": {
"cwe_ids": [
"CWE-122"
],
"cna_assigner": "GitLab",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"introduced": "4.6.0"
},
{
"fixed": "4.6.8"
},
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.18"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76886.json"
}
},
"related_cves": [
{
"value": "CVE-2026-76886",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 517068,
"published_at": "2026-08-19T22:35:24.922+00:00"
}