CVE-2026-43333

Katalog CVE

CVSS 5.5 · Medium EPSS 0,16%

Kerentanan NULL Pointer Dereference pada linux kernel. Skor CVSS 3.1 5.5 (Medium) menurut NVD.

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: bpf: reject direct access to nullable PTR_TO_BUF pointers check_mem_access() matches PTR_TO_BUF via base_type() which strips PTR_MAYBE_NULL, allowing direct dereference without a null check. Map iterator ctx->key and ctx->value are PTR_TO_BUF | PTR_MAYBE_NULL. On stop callbacks these are NULL, causing a kernel NULL dereference. Add a type_may_be_null() guard to the PTR_TO_BUF branch, matching the existing PTR_TO_BTF_ID pattern.

Rincian

Terbit di NVD

8 Mei 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-476: NULL Pointer Dereference

EPSS (30 hari)

0,16% peluang dieksploitasi; lebih tinggi dari 4,9% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/10bc4a4dcded509c5d5c67d497900c3922c604cd patch
• https://git.kernel.org/stable/c/21a10c06ffae24cb01fd174a7ab7736001d2ea56 patch
• https://git.kernel.org/stable/c/4f6c99dc0420f1a3d671c1b8ab8a7ac84d9cba09 patch
• https://git.kernel.org/stable/c/63276547debc4d8a73eefb2c5273b2a905c961b0 patch
• https://git.kernel.org/stable/c/70abd9d118da2f56beb4ec22e3a29becae373535 patch
• https://git.kernel.org/stable/c/8755066f7bd0f4ac46a29d1708c7b20894539252 patch
• https://git.kernel.org/stable/c/b0db1accbc7395657c2b79db59fa9fae0d6656f3 patch