CVE-2026-31389
Analyzed Analyzed - Analysis Complete
Use-After-Free in Linux Kernel SPI Controller Registration

Publication date: 2026-04-03

Last updated on: 2026-05-20

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: spi: fix use-after-free on controller registration failure Make sure to deregister from driver core also in the unlikely event that per-cpu statistics allocation fails during controller registration to avoid use-after-free (of driver resources) and unclocked register accesses.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-04-03
Last Modified
2026-05-20
Generated
2026-06-16
AI Q&A
2026-04-03
EPSS Evaluated
2026-06-15
NVD
CVE-2026-31389
EUVD
EUVD-2026-18761
Affected Vendors & Products
Showing 9 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 From 6.2 (inc) to 6.6.130 (exc)
linux linux_kernel From 6.7 (inc) to 6.12.78 (exc)
linux linux_kernel From 6.13 (inc) to 6.18.20 (exc)
linux linux_kernel From 6.19 (inc) to 6.19.10 (exc)
linux linux_kernel From 6.0 (inc) to 6.1.167 (exc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-416 The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Impact Analysis

The use-after-free vulnerability can cause the system to access freed memory, which may lead to system instability, crashes, or potential execution of arbitrary code.

Such issues can compromise the reliability and security of the Linux kernel, potentially affecting any system using the vulnerable SPI controller registration code.

Executive Summary

This vulnerability is a use-after-free issue in the Linux kernel related to the SPI (Serial Peripheral Interface) controller registration process.

Specifically, if the allocation of per-CPU statistics fails during the controller registration, the driver does not properly deregister from the driver core. This leads to use-after-free of driver resources and unclocked register accesses.

Mitigation Strategies

The vulnerability has been resolved by fixing the use-after-free issue in the Linux kernel related to SPI controller registration failure.

To mitigate this vulnerability, you should update your Linux kernel to a version that includes this fix.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-31389. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart