UBUNTU-CVE-2026-81886 (CVE-2026-81886)
Vulnerability from osv_ubuntu – Published: 2026-09-22 16:18 – Updated: 2026-09-22 16:18 – Source website
VLAI
Details
radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2's Windows 64-bit crash-dump dmp64 parser was vulnerable because the Windows dmp64 parser used an input-controlled physical-memory-run PageCount directly as the bound of a per-page allocation loop. The vulnerability is triggered by opening a small crafted full-memory Windows crash dump. The parser repeatedly allocated and appended page descriptors without validating the count against the dump size. This can cause denial of service through excessive memory consumption and processing time. This issue is fixed in version 6.2.0.
Severity
5.5 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libradare2-0.9.6",
"binary_version": "0.9.6-3.1ubuntu1"
},
{
"binary_name": "libradare2-common",
"binary_version": "0.9.6-3.1ubuntu1"
},
{
"binary_name": "radare2",
"binary_version": "0.9.6-3.1ubuntu1"
},
{
"binary_name": "radare2-plugins",
"binary_version": "0.9.6-3.1ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "radare2",
"purl": "pkg:deb/ubuntu/radare2@0.9.6-3.1ubuntu1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.9.6-3.1ubuntu1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libradare2-2.3",
"binary_version": "2.3.0+dfsg-2ubuntu0.1~esm1"
},
{
"binary_name": "libradare2-common",
"binary_version": "2.3.0+dfsg-2ubuntu0.1~esm1"
},
{
"binary_name": "radare2",
"binary_version": "2.3.0+dfsg-2ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "radare2",
"purl": "pkg:deb/ubuntu/radare2@2.3.0+dfsg-2ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.6.0+dfsg-1",
"2.0.0+dfsg-1",
"2.1.0+dfsg-1",
"2.3.0+dfsg-1",
"2.3.0+dfsg-2",
"2.3.0+dfsg-2ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libradare2-4.2.1",
"binary_version": "4.2.1+dfsg-2ubuntu0.1~esm1"
},
{
"binary_name": "libradare2-common",
"binary_version": "4.2.1+dfsg-2ubuntu0.1~esm1"
},
{
"binary_name": "radare2",
"binary_version": "4.2.1+dfsg-2ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "radare2",
"purl": "pkg:deb/ubuntu/radare2@4.2.1+dfsg-2ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.2.1+dfsg-5build1",
"4.0.0+dfsg-1",
"4.2.1+dfsg-1",
"4.2.1+dfsg-2",
"4.2.1+dfsg-2ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libradare2-5.0.0t64",
"binary_version": "5.5.0+dfsg-1.1ubuntu3+esm1"
},
{
"binary_name": "libradare2-common",
"binary_version": "5.5.0+dfsg-1.1ubuntu3+esm1"
},
{
"binary_name": "radare2",
"binary_version": "5.5.0+dfsg-1.1ubuntu3+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:24.04:LTS",
"name": "radare2",
"purl": "pkg:deb/ubuntu/radare2@5.5.0+dfsg-1.1ubuntu3+esm1?arch=source\u0026distro=esm-apps/noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.5.0+dfsg-1ubuntu1",
"5.5.0+dfsg-1.1ubuntu2",
"5.5.0+dfsg-1.1ubuntu3",
"5.5.0+dfsg-1.1ubuntu3+esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libradare2-6.0.0t64",
"binary_version": "6.0.7+ds-1"
},
{
"binary_name": "libradare2-common",
"binary_version": "6.0.7+ds-1"
},
{
"binary_name": "radare2",
"binary_version": "6.0.7+ds-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "radare2",
"purl": "pkg:deb/ubuntu/radare2@6.0.7+ds-1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.9.8+dfsg-2",
"6.0.4+dfsg-1",
"6.0.7+ds-1"
]
}
],
"aliases": [],
"details": "radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2\u0027s Windows 64-bit crash-dump dmp64 parser was vulnerable because the Windows dmp64 parser used an input-controlled physical-memory-run PageCount directly as the bound of a per-page allocation loop. The vulnerability is triggered by opening a small crafted full-memory Windows crash dump. The parser repeatedly allocated and appended page descriptors without validating the count against the dump size. This can cause denial of service through excessive memory consumption and processing time. This issue is fixed in version 6.2.0.",
"id": "UBUNTU-CVE-2026-81886",
"modified": "2026-09-22T16:18:00Z",
"published": "2026-09-22T16:18:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-81886"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-81886"
},
{
"type": "REPORT",
"url": "https://github.com/radareorg/radare2/security/advisories/GHSA-3xrx-wh64-8xr8"
},
{
"type": "REPORT",
"url": "https://github.com/radareorg/radare2/issues/26224"
},
{
"type": "REPORT",
"url": "https://github.com/radareorg/radare2/pull/26180"
},
{
"type": "REPORT",
"url": "https://github.com/radareorg/radare2/commit/a7519fdb4da6835c2cecd8fe248e7dd1133cf17a"
},
{
"type": "REPORT",
"url": "https://github.com/radareorg/radare2/releases/tag/6.2.0"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-81886"
]
}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
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