CVE-2026-46231
Analyzed Analyzed - Analysis Complete
BLA Reference Leak in Linux Kernel batman-adv

Publication date: 2026-05-28

Last updated on: 2026-06-10

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: batman-adv: bla: put backbone reference on failed claim hash insert When batadv_bla_add_claim() fails to insert a new claim into the hash, it leaked a reference to the backbone_gw for which the claim was intended. Call batadv_backbone_gw_put() on the error path to release the reference and avoid leaking the backbone_gw object.
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Meta Information
Published
2026-05-28
Last Modified
2026-06-10
Generated
2026-06-17
AI Q&A
2026-05-28
EPSS Evaluated
2026-06-16
NVD
CVE-2026-46231
EUVD
EUVD-2026-32858
Affected Vendors & Products
Showing 13 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 3.16.39 (inc) to 3.17 (exc)
linux linux_kernel 4.7
linux linux_kernel 7.1
linux linux_kernel 7.1
linux linux_kernel 7.1
linux linux_kernel From 5.16 (inc) to 6.1.175 (exc)
linux linux_kernel From 5.11 (inc) to 5.15.209 (exc)
linux linux_kernel From 6.2 (inc) to 6.6.140 (exc)
linux linux_kernel From 6.13 (inc) to 6.18.32 (exc)
linux linux_kernel From 6.7 (inc) to 6.12.90 (exc)
linux linux_kernel From 6.19 (inc) to 7.0.9 (exc)
linux linux_kernel From 4.4.217 (inc) to 4.5 (exc)
linux linux_kernel From 4.7.1 (inc) to 5.10.258 (exc)
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Exploitability
CWE
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability exists in the Linux kernel component batman-adv, specifically in the bla (batman-adv link aggregation) module. When the function batadv_bla_add_claim() fails to insert a new claim into a hash table, it incorrectly leaks a reference to the backbone gateway (backbone_gw) object that the claim was intended for. This means that the reference count to the backbone_gw object is not properly released on error, potentially causing a resource leak.

Impact Analysis

The impact of this vulnerability is a resource leak in the Linux kernel's batman-adv module. Specifically, leaking references to backbone gateway objects can lead to increased memory usage or resource exhaustion over time, which might degrade system performance or stability. However, there is no indication that this vulnerability leads to privilege escalation, data corruption, or remote code execution.

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