CVE-2026-31443
Received Received - Intake
Use-After-Free Crash in Linux dmaengine idxd Driver

Publication date: 2026-04-22

Last updated on: 2026-05-07

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Fix crash when the event log is disabled If reporting errors to the event log is not supported by the hardware, and an error that causes Function Level Reset (FLR) is received, the driver will try to restore the event log even if it was not allocated. Also, only try to free the event log if it was properly allocated.
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Meta Information
Published
2026-04-22
Last Modified
2026-05-07
Generated
2026-06-16
AI Q&A
2026-04-22
EPSS Evaluated
2026-06-15
NVD
CVE-2026-31443
EUVD
EUVD-2026-24775
Affected Vendors & Products
Showing 7 associated CPEs
Vendor Product Version / Range
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel From 6.19 (inc) to 6.19.11 (exc)
linux linux_kernel From 6.14 (inc) to 6.18.21 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

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.

Impact Analysis

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.

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