CVE-2026-64091

Katalog CVE

CVSS 9.8 · Critical EPSS 0,43%

Kerentanan Time-of-check Time-of-use (TOCTOU) Race Condition pada linux kernel. Skor CVSS 3.1 9.8 (Critical) menurut CNA.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

19 Juli 2026

Terakhir diubah

11 Agustus 2026

Status NVD

Analyzed

CVSS 3.1

9.8 (Critical), sumber CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition

EPSS (30 hari)

0,43% peluang dieksploitasi; lebih tinggi dari 35,1% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/211ea59988e1cba43cb0367ad65d379b56f9c3bd patch
• https://git.kernel.org/stable/c/4cc85aec8d3c9ab4dc716dc9f1ed36fca16b227f patch
• https://git.kernel.org/stable/c/65a1e67339aa8c95ac544b796946af388930ee23 patch
• https://git.kernel.org/stable/c/724a8eb4155669797c96b70d70e354284ae3b5a8 patch
• https://git.kernel.org/stable/c/94d27005016be15ffc638b2ecbc4d58805ad7b48 patch
• https://git.kernel.org/stable/c/9a9c859457bc440a55773e01ff18b1bb5bab6836 patch
• https://git.kernel.org/stable/c/b4d4efd4e351593c81e9293d4b4408d244fa5ee7 patch
• https://git.kernel.org/stable/c/e4236bf3ec8d6bb15d0d8d825dcf9933a7d6666b patch