CVE-2026-31443
kernel: dmaengine: idxd: Fix crash when the event log is disabled
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · April 22, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's dmaengine: idxd driver. When hardware does not support event logging and an error triggers a Function Level Reset (FLR), the driver attempts to restore or free an event log that was never allocated. This improper handling can lead to a system crash, resulting in a Denial of Service (DoS) for affected systems.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-824 · Access of Uninitialized Pointer