CVE-2026-31443
Use-After-Free Crash in Linux dmaengine idxd Driver
Publication date: 2026-04-22
Last updated on: 2026-04-22
Assigner: kernel.org
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in the Linux kernel's dmaengine idxd driver. It occurs when the hardware does not support reporting errors to the event log, and an error causing a Function Level Reset (FLR) is received. In this case, the driver incorrectly attempts to restore the event log even though it was never allocated, which can lead to a crash. Additionally, the driver may try to free the event log without verifying if it was properly allocated.
How can this vulnerability impact me? :
This vulnerability can cause the Linux kernel to crash when certain hardware errors occur and the event log is disabled or unsupported. Such crashes can lead to system instability, unexpected downtime, and potential loss of data or service availability.