ubuntu-cve-2026-71226
Vulnerability from osv_ubuntu
Published
2026-08-06 00:00
Modified
2026-08-06 00:00
Summary
Details
Memory Corruption via Uncanceled AIO Requests on Error: libkcapi's one-shot AIO path can return an error before all submitted IOCBs are drained, allowing later kernel writes into caller-owned output buffers.
Severity
7.3 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libkcapi-bin",
"binary_version": "0.13.0-0ubuntu1~ppa2"
},
{
"binary_name": "libkcapi0",
"binary_version": "0.13.0-0ubuntu1~ppa2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:FIPS:16.04:LTS",
"name": "libkcapi",
"purl": "pkg:deb/ubuntu/libkcapi@0.13.0-0ubuntu1~ppa2?arch=source\u0026distro=fips-updates/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.13.0-0ubuntu1~ppa1",
"0.13.0-0ubuntu1~ppa2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libkcapi-bin",
"binary_version": "0.13.0-0ubuntu1~ppa2"
},
{
"binary_name": "libkcapi0",
"binary_version": "0.13.0-0ubuntu1~ppa2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:FIPS:16.04:LTS",
"name": "libkcapi",
"purl": "pkg:deb/ubuntu/libkcapi@0.13.0-0ubuntu1~ppa2?arch=source\u0026distro=fips/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.13.0-0ubuntu1~ppa1",
"0.13.0-0ubuntu1~ppa2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "kcapi-tools",
"binary_version": "1.0.3-2"
},
{
"binary_name": "libkcapi1",
"binary_version": "1.0.3-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "libkcapi",
"purl": "pkg:deb/ubuntu/libkcapi@1.0.3-2?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.0.0-2",
"1.0.1-1",
"1.0.2-1",
"1.0.3-2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "kcapi-tools",
"binary_version": "1.0.3-2fips3"
},
{
"binary_name": "libkcapi1",
"binary_version": "1.0.3-2fips3"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:FIPS-updates:18.04:LTS",
"name": "libkcapi",
"purl": "pkg:deb/ubuntu/libkcapi@1.0.3-2fips3?arch=source\u0026distro=fips-updates/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.0.3-2fips3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "kcapi-tools",
"binary_version": "1.0.3-2fips3"
},
{
"binary_name": "libkcapi1",
"binary_version": "1.0.3-2fips3"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:FIPS:18.04:LTS",
"name": "libkcapi",
"purl": "pkg:deb/ubuntu/libkcapi@1.0.3-2fips3?arch=source\u0026distro=fips/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.0.3-2fips3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "kcapi-tools",
"binary_version": "1.1.5-1"
},
{
"binary_name": "libkcapi1",
"binary_version": "1.1.5-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "libkcapi",
"purl": "pkg:deb/ubuntu/libkcapi@1.1.5-1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.1.3-1",
"1.1.5-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "kcapi-tools",
"binary_version": "1.1.5-1fips1"
},
{
"binary_name": "libkcapi1",
"binary_version": "1.1.5-1fips1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:FIPS-updates:20.04:LTS",
"name": "libkcapi",
"purl": "pkg:deb/ubuntu/libkcapi@1.1.5-1fips1?arch=source\u0026distro=fips-updates/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.1.5-1fips1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "kcapi-tools",
"binary_version": "1.1.5-1fips1"
},
{
"binary_name": "libkcapi1",
"binary_version": "1.1.5-1fips1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:FIPS:20.04:LTS",
"name": "libkcapi",
"purl": "pkg:deb/ubuntu/libkcapi@1.1.5-1fips1?arch=source\u0026distro=fips/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.1.5-1fips1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "kcapi-tools",
"binary_version": "1.4.0-1"
},
{
"binary_name": "libkcapi1",
"binary_version": "1.4.0-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "libkcapi",
"purl": "pkg:deb/ubuntu/libkcapi@1.4.0-1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.2.1-1",
"1.3.1-1",
"1.3.1-2",
"1.3.1-3",
"1.4.0-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "kcapi-tools",
"binary_version": "1.4.0-1ubuntu0.1~Fips1"
},
{
"binary_name": "libkcapi1",
"binary_version": "1.4.0-1ubuntu0.1~Fips1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:FIPS-preview:22.04:LTS",
"name": "libkcapi",
"purl": "pkg:deb/ubuntu/libkcapi@1.4.0-1ubuntu0.1~Fips1?arch=source\u0026distro=fips-preview/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.4.0-1ubuntu0.1~Fips1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "kcapi-tools",
"binary_version": "1.4.0-1ubuntu0.1~Fips1"
},
{
"binary_name": "libkcapi1",
"binary_version": "1.4.0-1ubuntu0.1~Fips1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:FIPS-updates:22.04:LTS",
"name": "libkcapi",
"purl": "pkg:deb/ubuntu/libkcapi@1.4.0-1ubuntu0.1~Fips1?arch=source\u0026distro=fips-updates/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.4.0-1ubuntu0.1~Fips1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "kcapi-tools",
"binary_version": "1.4.0-1ubuntu4"
},
{
"binary_name": "libkcapi1",
"binary_version": "1.4.0-1ubuntu4"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "libkcapi",
"purl": "pkg:deb/ubuntu/libkcapi@1.4.0-1ubuntu4?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.4.0-1ubuntu3",
"1.4.0-1ubuntu4"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "kcapi-tools",
"binary_version": "1.4.0-1ubuntu5"
},
{
"binary_name": "libkcapi1",
"binary_version": "1.4.0-1ubuntu5"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "libkcapi",
"purl": "pkg:deb/ubuntu/libkcapi@1.4.0-1ubuntu5?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.4.0-1ubuntu4",
"1.4.0-1ubuntu5"
]
}
],
"aliases": [],
"details": "Memory Corruption via Uncanceled AIO Requests on Error: libkcapi\u0027s one-shot AIO path can return an error before all submitted IOCBs are drained, allowing later kernel writes into caller-owned output buffers.",
"id": "UBUNTU-CVE-2026-71226",
"modified": "2026-08-06T00:00:00Z",
"published": "2026-08-06T00:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-71226"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-71226"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2462114"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-71226"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-71226"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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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.
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