CVE catalog
CVE-2026-71227
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, th
- Severity
- Medium · CVSS 5.1
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.20% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | libkcapi | sid | 1.5.1-2 | fixed |
| Debian | libkcapi | forky | 1.5.1-2 | fixed |
| Debian | libkcapi | trixie | 1.4.0-1 | vulnerable |
| Debian | libkcapi | bookworm | 1.4.0-1 | vulnerable |
| Cpe | hardened_images | Not reported | Not reported | unknown |
| Cpe | openshift_container_platform | Not reported | Not reported | unknown |
| Cpe | libkcapi | Not reported | 1.5.1 | fixed |
| Cpe | enterprise_linux | Not reported | Not reported | unknown |
| Alpine | libkcapi | 3.21 | 1.5.1-r0 | fixed |
| Alpine | libkcapi | 3.22 | 1.5.1-r0 | fixed |
| Alpine | libkcapi | 3.23 | 1.5.1-r0 | fixed |
| Alpine | libkcapi | 3.24 | 1.5.1-r0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | libkcapi | source | sid | 1.5.1-1 | not yet assigned | Not reported | [1143974] |
| Debian | libkcapi | source | forky | 1.5.1-1 | not yet assigned | Not reported | [1143974] |
| Debian | libkcapi | source | trixie | (unfixed) | not yet assigned | Not reported | [1143974] |
| Debian | libkcapi | source | bookworm | (unfixed) | not yet assigned | Not reported | [1143974] |
| Cpe | libkcapi | cpe | Not reported | 1.5.1 | Not reported | NVD-CVE-2026-71227 | Not reported |
| Alpine | libkcapi | apk | 3.21 | 1.5.1-r0 | Not reported | ALPINE-CVE-2026-71227 | Not reported |
| Alpine | libkcapi | apk | 3.22 | 1.5.1-r0 | Not reported | ALPINE-CVE-2026-71227 | Not reported |
| Alpine | libkcapi | apk | 3.23 | 1.5.1-r0 | Not reported | ALPINE-CVE-2026-71227 | Not reported |
| Alpine | libkcapi | apk | 3.24 | 1.5.1-r0 | Not reported | ALPINE-CVE-2026-71227 | Not reported |
Notes
[trixie] libkcapi: Minor issue [bookworm] libkcapi: Minor issue, revisit when fixed upstream
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [kcapi-tools]Affected
Source package: [libkcapi]
Details (2)
1.4.0-1· amd64 · bookwormAffected
nvd · libkcapi · debian · bookworm; nvd · libkcapi · debian · 12
1.4.0-1· arm64 · bookwormAffected
nvd · libkcapi · debian · bookworm; nvd · libkcapi · debian · 12
- [libkcapi1]Affected
Source package: [libkcapi]
Details (2)
1.4.0-1· amd64 · bookwormAffected
nvd · libkcapi · debian · bookworm; nvd · libkcapi · debian · 12
1.4.0-1· arm64 · bookwormAffected
nvd · libkcapi · debian · bookworm; nvd · libkcapi · debian · 12
- [libkcapi-dev]Affected
Source package: [libkcapi]
Details (2)
1.4.0-1· amd64 · bookwormAffected
nvd · libkcapi · debian · bookworm; nvd · libkcapi · debian · 12
1.4.0-1· arm64 · bookwormAffected
nvd · libkcapi · debian · bookworm; nvd · libkcapi · debian · 12
- [libkcapi-doc]Affected
Source package: [libkcapi]
Details (2)
1.4.0-1· all · bookwormAffected
nvd · libkcapi · debian · bookworm; nvd · libkcapi · debian · 12
1.4.0-1· all · bookwormAffected
nvd · libkcapi · debian · bookworm; nvd · libkcapi · debian · 12
[Debian 13 (Trixie)]
- [kcapi-tools]Affected
Source package: [libkcapi]
Details (2)
1.4.0-1+b2· amd64 · trixieAffected
nvd · libkcapi · debian · 13
1.4.0-1+b2· arm64 · trixieAffected
nvd · libkcapi · debian · 13
- [libkcapi1]Affected
Source package: [libkcapi]
Details (2)
1.4.0-1+b2· amd64 · trixieAffected
nvd · libkcapi · debian · 13
1.4.0-1+b2· arm64 · trixieAffected
nvd · libkcapi · debian · 13
- [libkcapi-dev]Affected
Source package: [libkcapi]
Details (2)
1.4.0-1+b2· amd64 · trixieAffected
nvd · libkcapi · debian · 13
1.4.0-1+b2· arm64 · trixieAffected
nvd · libkcapi · debian · 13
- [libkcapi-doc]Affected
Source package: [libkcapi]
Details (2)
1.4.0-1· all · trixieAffected
nvd · libkcapi · debian · 13
1.4.0-1· all · trixieAffected
nvd · libkcapi · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2026_67265.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-71227]
- [https://osv.dev/vulnerability/ALPINE-CVE-2026-71227]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-71227]
- [https://security-tracker.debian.org/tracker/CVE-2026-71227]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-71227.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3322.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]