OESA-2026-3440 (CVE-2026-71226)
Vulnerability from osv_openeuler – Published: 2026-08-20 09:58 – Updated: 2026-08-20 09:58 – Source website
VLAI
Summary
libkcapi security update
Details
The Linux kernel exports a Netlink interface of type AF_ALG to allow user space to utilize the kernel crypto API. libkcapi uses this Netlink interface and exports easy to use APIs so that a developer does not need to consider the low-level Netlink interface handling. The library does not implement any cipher algorithms. All consumer requests are sent to the kernel for processing. Results from the kernel crypto API are returned to the consumer via the library API.
Security Fix(es):
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.(CVE-2026-71226)
A flaw was found in libkcapi. A local attacker can influence an application that uses the Asynchronous Input/Output (AIO) interface. By reusing an AIO-enabled handle after a prior completion error, the _kcapi_aio_read_all() function can enter a non-terminating wait loop. This can lead to a persistent denial of service, making the affected application or thread unresponsive.(CVE-2026-71227)
Severity
7.3 (High)
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"ecosystem_specific": {
"aarch64": [
"libkcapi-1.4.0-10.oe2403sp4.aarch64.rpm",
"libkcapi-debuginfo-1.4.0-10.oe2403sp4.aarch64.rpm",
"libkcapi-debugsource-1.4.0-10.oe2403sp4.aarch64.rpm",
"libkcapi-devel-1.4.0-10.oe2403sp4.aarch64.rpm",
"libkcapi-tests-1.4.0-10.oe2403sp4.aarch64.rpm"
],
"noarch": [
"libkcapi-help-1.4.0-10.oe2403sp4.noarch.rpm"
],
"src": [
"libkcapi-1.4.0-10.oe2403sp4.src.rpm"
],
"x86_64": [
"libkcapi-1.4.0-10.oe2403sp4.x86_64.rpm",
"libkcapi-debuginfo-1.4.0-10.oe2403sp4.x86_64.rpm",
"libkcapi-debugsource-1.4.0-10.oe2403sp4.x86_64.rpm",
"libkcapi-devel-1.4.0-10.oe2403sp4.x86_64.rpm",
"libkcapi-tests-1.4.0-10.oe2403sp4.x86_64.rpm"
]
},
"package": {
"ecosystem": "openEuler:24.03-LTS-SP4",
"name": "libkcapi",
"purl": "pkg:rpm/openEuler/libkcapi\u0026distro=openEuler-24.03-LTS-SP4"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.4.0-10.oe2403sp4"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"ecosystem_specific": {
"aarch64": [
"libkcapi-1.2.0-10.oe2003sp4.aarch64.rpm",
"libkcapi-debuginfo-1.2.0-10.oe2003sp4.aarch64.rpm",
"libkcapi-debugsource-1.2.0-10.oe2003sp4.aarch64.rpm",
"libkcapi-devel-1.2.0-10.oe2003sp4.aarch64.rpm",
"libkcapi-tests-1.2.0-10.oe2003sp4.aarch64.rpm"
],
"noarch": [
"libkcapi-help-1.2.0-10.oe2003sp4.noarch.rpm"
],
"src": [
"libkcapi-1.2.0-10.oe2003sp4.src.rpm"
],
"x86_64": [
"libkcapi-1.2.0-10.oe2003sp4.x86_64.rpm",
"libkcapi-debuginfo-1.2.0-10.oe2003sp4.x86_64.rpm",
"libkcapi-debugsource-1.2.0-10.oe2003sp4.x86_64.rpm",
"libkcapi-devel-1.2.0-10.oe2003sp4.x86_64.rpm",
"libkcapi-tests-1.2.0-10.oe2003sp4.x86_64.rpm"
]
},
"package": {
"ecosystem": "openEuler:20.03-LTS-SP4",
"name": "libkcapi",
"purl": "pkg:rpm/openEuler/libkcapi\u0026distro=openEuler-20.03-LTS-SP4"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.2.0-10.oe2003sp4"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"ecosystem_specific": {
"aarch64": [
"libkcapi-1.3.1-9.oe2203sp4.aarch64.rpm",
"libkcapi-debuginfo-1.3.1-9.oe2203sp4.aarch64.rpm",
"libkcapi-debugsource-1.3.1-9.oe2203sp4.aarch64.rpm",
"libkcapi-devel-1.3.1-9.oe2203sp4.aarch64.rpm",
"libkcapi-tests-1.3.1-9.oe2203sp4.aarch64.rpm"
],
"noarch": [
"libkcapi-help-1.3.1-9.oe2203sp4.noarch.rpm"
],
"src": [
"libkcapi-1.3.1-9.oe2203sp4.src.rpm"
],
"x86_64": [
"libkcapi-1.3.1-9.oe2203sp4.x86_64.rpm",
"libkcapi-debuginfo-1.3.1-9.oe2203sp4.x86_64.rpm",
"libkcapi-debugsource-1.3.1-9.oe2203sp4.x86_64.rpm",
"libkcapi-devel-1.3.1-9.oe2203sp4.x86_64.rpm",
"libkcapi-tests-1.3.1-9.oe2203sp4.x86_64.rpm"
]
},
"package": {
"ecosystem": "openEuler:22.03-LTS-SP4",
"name": "libkcapi",
"purl": "pkg:rpm/openEuler/libkcapi\u0026distro=openEuler-22.03-LTS-SP4"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.3.1-9.oe2203sp4"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"ecosystem_specific": {
"aarch64": [
"libkcapi-1.4.0-10.oe2403sp1.aarch64.rpm",
"libkcapi-debuginfo-1.4.0-10.oe2403sp1.aarch64.rpm",
"libkcapi-debugsource-1.4.0-10.oe2403sp1.aarch64.rpm",
"libkcapi-devel-1.4.0-10.oe2403sp1.aarch64.rpm",
"libkcapi-tests-1.4.0-10.oe2403sp1.aarch64.rpm"
],
"noarch": [
"libkcapi-help-1.4.0-10.oe2403sp1.noarch.rpm"
],
"src": [
"libkcapi-1.4.0-10.oe2403sp1.src.rpm"
],
"x86_64": [
"libkcapi-1.4.0-10.oe2403sp1.x86_64.rpm",
"libkcapi-debuginfo-1.4.0-10.oe2403sp1.x86_64.rpm",
"libkcapi-debugsource-1.4.0-10.oe2403sp1.x86_64.rpm",
"libkcapi-devel-1.4.0-10.oe2403sp1.x86_64.rpm",
"libkcapi-tests-1.4.0-10.oe2403sp1.x86_64.rpm"
]
},
"package": {
"ecosystem": "openEuler:24.03-LTS-SP1",
"name": "libkcapi",
"purl": "pkg:rpm/openEuler/libkcapi\u0026distro=openEuler-24.03-LTS-SP1"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.4.0-10.oe2403sp1"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"ecosystem_specific": {
"aarch64": [
"libkcapi-1.4.0-10.oe2403sp3.aarch64.rpm",
"libkcapi-debuginfo-1.4.0-10.oe2403sp3.aarch64.rpm",
"libkcapi-debugsource-1.4.0-10.oe2403sp3.aarch64.rpm",
"libkcapi-devel-1.4.0-10.oe2403sp3.aarch64.rpm",
"libkcapi-tests-1.4.0-10.oe2403sp3.aarch64.rpm"
],
"noarch": [
"libkcapi-help-1.4.0-10.oe2403sp3.noarch.rpm"
],
"src": [
"libkcapi-1.4.0-10.oe2403sp3.src.rpm"
],
"x86_64": [
"libkcapi-1.4.0-10.oe2403sp3.x86_64.rpm",
"libkcapi-debuginfo-1.4.0-10.oe2403sp3.x86_64.rpm",
"libkcapi-debugsource-1.4.0-10.oe2403sp3.x86_64.rpm",
"libkcapi-devel-1.4.0-10.oe2403sp3.x86_64.rpm",
"libkcapi-tests-1.4.0-10.oe2403sp3.x86_64.rpm"
]
},
"package": {
"ecosystem": "openEuler:24.03-LTS-SP3",
"name": "libkcapi",
"purl": "pkg:rpm/openEuler/libkcapi\u0026distro=openEuler-24.03-LTS-SP3"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.4.0-10.oe2403sp3"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"severity": "High"
},
"details": "The Linux kernel exports a Netlink interface of type AF_ALG to allow user space to utilize the kernel crypto API. libkcapi uses this Netlink interface and exports easy to use APIs so that a developer does not need to consider the low-level Netlink interface handling. The library does not implement any cipher algorithms. All consumer requests are sent to the kernel for processing. Results from the kernel crypto API are returned to the consumer via the library API.\r\n\r\nSecurity Fix(es):\n\nMemory Corruption via Uncanceled AIO Requests on Error: libkcapi\u0026apos;s one-shot AIO path can return an error before all submitted IOCBs are drained, allowing later kernel writes into caller-owned output buffers.(CVE-2026-71226)\n\nA flaw was found in libkcapi. A local attacker can influence an application that uses the Asynchronous Input/Output (AIO) interface. By reusing an AIO-enabled handle after a prior completion error, the _kcapi_aio_read_all() function can enter a non-terminating wait loop. This can lead to a persistent denial of service, making the affected application or thread unresponsive.(CVE-2026-71227)",
"id": "OESA-2026-3440",
"modified": "2026-08-20T09:58:11Z",
"published": "2026-08-20T09:58:11Z",
"references": [
{
"type": "ADVISORY",
"url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3440"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-71226"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-71227"
}
],
"schema_version": "1.7.2",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
"type": "CVSS_V3"
}
],
"summary": "libkcapi security update",
"upstream": [
"CVE-2026-71226",
"CVE-2026-71227"
]
}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
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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.
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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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