CVE-2026-64354

Katalog CVE

CVSS 7.8 · High EPSS 0,13%

Kerentanan pada linux kernel. Skor CVSS 3.1 7.8 (High) menurut CNA.

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: bpf: Validate BTF repeated field counts before expansion btf_parse_struct_metas() walks user-supplied BTF during BPF_BTF_LOAD, and btf_repeat_fields() expands repeatable fields from array elements into the fixed BTF_FIELDS_MAX scratch array used by btf_parse_fields(). The remaining-capacity check performs the expanded field count calculation in u32. A malformed BTF can wrap that calculation, causing the check to pass even when the expanded field count exceeds the scratch array capacity. The following memcpy() can then write past the end of the array. Use checked addition and multiplication before copying repeated fields and reject impossible counts.

Rincian

Terbit di NVD

25 Juli 2026

Terakhir diubah

4 September 2026

Status NVD

Analyzed

CVSS 3.1

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

EPSS (30 hari)

0,13% peluang dieksploitasi; lebih tinggi dari 2,1% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/b9452b594fd3aecbfd4aa0a6a1f741330a37dab7 patch
• https://git.kernel.org/stable/c/c5ff816d5f13900c3f1f3298cfcc61339e056e56 patch
• https://git.kernel.org/stable/c/cd407de2ef5dc70f1970b343ffaa16186340fdfd patch
• https://git.kernel.org/stable/c/ff77d013b737c0f77d925e2f2c59f0cf3d76bd35 patch