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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-64091 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: batman-adv: tt: fix TOCTOU race for reported vlans The local TT based TVLV is generated by first checking the number of VLANs which have at least one TT entry. A new buffer with the correct size for the VLANs is then allocated. Only then, the list of VLANs s used to fill the VLAN entries in the buffer. During this time, the meshif_vlan_list_lock is held. But the actual number of TT entries of each VLAN can still increase during this time - just not the number of VLANs in the list. But the prefilter used in the buffer size calculation might still cause an increase of the number of VLANs which need to be stored. Simply because a VLAN might now suddenly have at least one entry when it had none in the pre-alloc check - and then needs to occupy space which was not allocated. It is better to overestimate the buffer size at the beginning and then fill the buffer only with the VLANs which are not empty.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/211ea59988e1cba43cb0367ad65d379b56f9c3bd kernel.org
https://git.kernel.org/stable/c/4cc85aec8d3c9ab4dc716dc9f1ed36fca16b227f kernel.org
https://git.kernel.org/stable/c/65a1e67339aa8c95ac544b796946af388930ee23 kernel.org
https://git.kernel.org/stable/c/724a8eb4155669797c96b70d70e354284ae3b5a8 kernel.org
https://git.kernel.org/stable/c/94d27005016be15ffc638b2ecbc4d58805ad7b48 kernel.org
https://git.kernel.org/stable/c/9a9c859457bc440a55773e01ff18b1bb5bab6836 kernel.org
https://git.kernel.org/stable/c/b4d4efd4e351593c81e9293d4b4408d244fa5ee7 kernel.org
https://git.kernel.org/stable/c/e4236bf3ec8d6bb15d0d8d825dcf9933a7d6666b kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-64091
NVD Published Date:
07/19/2026
NVD Last Modified:
07/20/2026
Source:
kernel.org