CVE-2026-46003
Analyzed Analyzed - Analysis Complete
Memory Exhaustion in Linux Kernel QRTR Nameserver

Publication date: 2026-05-27

Last updated on: 2026-06-16

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: net: qrtr: ns: Limit the total number of nodes Currently, the nameserver doesn't limit the number of nodes it handles. This can be an attack vector if a malicious client starts registering random nodes, leading to memory exhaustion. Hence, limit the maximum number of nodes to 64. Note that, limit of 64 is chosen based on the current platform requirements. If requirement changes in the future, this limit can be increased.
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Meta Information
Published
2026-05-27
Last Modified
2026-06-16
Generated
2026-06-16
AI Q&A
2026-05-27
EPSS Evaluated
2026-06-15
NVD
CVE-2026-46003
EUVD
EUVD-2026-32299
Affected Vendors & Products
Showing 4 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 6.7 (inc) to 6.12.86 (exc)
linux linux_kernel From 6.13 (inc) to 6.18.27 (exc)
linux linux_kernel From 6.19 (inc) to 7.0.4 (exc)
linux linux_kernel From 5.7 (inc) to 6.6.140 (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 qrtr nameserver component, which previously did not limit the number of nodes it could handle.

A malicious client could exploit this by registering a large number of random nodes, causing memory exhaustion on the system.

To fix this, the maximum number of nodes has been limited to 64, preventing excessive memory use due to uncontrolled node registrations.

Impact Analysis

If exploited, this vulnerability can lead to memory exhaustion on the affected Linux system.

Memory exhaustion can degrade system performance, cause crashes, or lead to denial of service, impacting availability and stability.

Mitigation Strategies

To mitigate this vulnerability, update the Linux kernel to a version where the nameserver limits the total number of nodes to 64. This prevents malicious clients from registering an excessive number of nodes and causing memory exhaustion.

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