CVE-2026-71227
Low
No strong exploitation signal.
CVSS base
5.1
MEDIUM
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS — probability of exploitation (30 days)
0.2%
6.2th percentile
CISA KEV
Not listed
Weakness / dates
CWE-835
Published 2026-08-05 · modified 2026-09-14
CVSS breakdown
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
| Attack Vector | L | Local |
| Attack Complexity | H | High |
| Privileges Required | N | None |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | N | None |
| Integrity | N | None |
| Availability | H | High |
Timeline
- 2026-08-05 — Published (NVD)
- 2026-09-14 — Last modified (NVD)
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.
Affected
References
- https://access.redhat.com/errata/RHSA-2026:56985
- https://access.redhat.com/errata/RHSA-2026:67265
- https://access.redhat.com/errata/RHSA-2026:67266
- https://access.redhat.com/errata/RHSA-2026:67267
- https://access.redhat.com/security/cve/CVE-2026-71227
- exploit https://bugzilla.redhat.com/show_bug.cgi?id=2462867