CVE-2026-71227: redhat enterprise_linux Infinite Loop
Vulnerability summary
CVE-2026-71227 is a medium (CVSS 5.1) Infinite Loop vulnerability in redhat enterprise_linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.3% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 5Timeline
- 05-08-2026PublishedVulnerability first disclosed.
- 21-09-2026Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
5 scores · 5 sources · 1 version- OSV · AlpineEcosystem advisory · calculated5.1MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated5.1MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.1MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST5.1MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.17%
Chance of exploitation in the next 30 days
Percentile
5%
Versus all other CVEs
30-day change
0.00 pp
From 0.17% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (bugzilla.redhat.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Redhat3 products
- enterprise_linux8.0 | 9.0 | 10.0
- hardened_imagesna
- openshift_container_platform4.0
Alpine1 product
- libkcapi≥ 0.12.0, < 1.5.1-r0
Debian1 product
- libkcapiAll versions (No fix recorded) | < 1.5.1-1
Smuellerdd1 product
- libkcapi≥ 0.12.0, < 1.5.1
Stephan muelle1 product
- libkcapi≥ 0.12.0, < 1.5.1
Ubuntu1 product
- libkcapiAll versions (No fix recorded)
6 vendors · 8 products
References
12 links- bugzilla.redhat.com/show_bug.cgi?id=2462867Issue TrackingX Refsource REDHATREPORTExploitVendor Advisory
