CVE-2026-31779
Analyzed Analyzed - Analysis Complete
Out-of-Bounds Read in Linux Kernel iwlwifi MVM Driver

Publication date: 2026-05-01

Last updated on: 2026-05-11

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: mvm: fix potential out-of-bounds read in iwl_mvm_nd_match_info_handler() The memcpy function assumes the dynamic array notif->matches is at least as large as the number of bytes to copy. Otherwise, results->matches may contain unwanted data. To guarantee safety, extend the validation in one of the checks to ensure sufficient packet length. Found by Linux Verification Center (linuxtesting.org) with SVACE.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-05-01
Last Modified
2026-05-11
Generated
2026-06-16
AI Q&A
2026-05-01
EPSS Evaluated
2026-06-15
NVD
CVE-2026-31779
EUVD
EUVD-2026-26592
Affected Vendors & Products
Showing 11 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 7.0
linux linux_kernel From 6.13 (inc) to 6.18.22 (exc)
linux linux_kernel From 6.19 (inc) to 6.19.12 (exc)
linux linux_kernel From 6.7 (inc) to 6.12.81 (exc)
linux linux_kernel From 6.2 (inc) to 6.6.134 (exc)
linux linux_kernel From 6.1 (inc) to 6.1.168 (exc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-125 The product reads data past the end, or before the beginning, of the intended buffer.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

This vulnerability exists in the Linux kernel's iwlwifi driver, specifically in the mvm component. It involves a potential out-of-bounds read in the function iwl_mvm_nd_match_info_handler(). The issue arises because the memcpy function assumes that the dynamic array notif->matches is at least as large as the number of bytes to copy. If this assumption is incorrect, the results->matches array may contain unwanted or invalid data. The fix involves extending validation checks to ensure the packet length is sufficient before performing the copy, preventing out-of-bounds reads.

Impact Analysis

This vulnerability can lead to out-of-bounds reads in kernel memory, which may cause the system to behave unpredictably or expose unintended data. Such memory safety issues can potentially be exploited to cause crashes or information leaks, impacting system stability and security.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-31779. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart