CVE-2026-23206

Katalog CVE

CVSS 5.5 · Medium EPSS 0,13%

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: dpaa2-switch: prevent ZERO_SIZE_PTR dereference when num_ifs is zero The driver allocates arrays for ports, FDBs, and filter blocks using kcalloc() with ethsw->sw_attr.num_ifs as the element count. When the device reports zero interfaces (either due to hardware configuration or firmware issues), kcalloc(0, ...) returns ZERO_SIZE_PTR (0x10) instead of NULL. Later in dpaa2_switch_probe(), the NAPI initialization unconditionally accesses ethsw->ports[0]->netdev, which attempts to dereference ZERO_SIZE_PTR (address 0x10), resulting in a kernel panic. Add a check to ensure num_ifs is greater than zero after retrieving device attributes. This prevents the zero-sized allocations and subsequent invalid pointer dereference.

Rincian

Terbit di NVD

14 Februari 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)

0,13% peluang dieksploitasi; lebih tinggi dari 2,5% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/155eb99aff2920153bf21217ae29565fff81e6af patch
• https://git.kernel.org/stable/c/2fcccca88456b592bd668db13aa1d29ed257ca2b patch
• https://git.kernel.org/stable/c/4acc40db06ffd0fd92683505342b00c8a7394c60 patch
• https://git.kernel.org/stable/c/80165ff16051448d6f840585ebe13f2400415df3 patch
• https://git.kernel.org/stable/c/b97415c4362f739e25ec6f71012277086fabdf6f patch
• https://git.kernel.org/stable/c/ed48a84a72fefb20a82dd90a7caa7807e90c6f66 patch