CVE-2026-31428

Katalog CVE

CVSS 5.5 · Medium EPSS 0,18%

Kerentanan Use of Uninitialized Resource pada linux kernel. Skor CVSS 3.1 5.5 (Medium) menurut NVD.

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_log: fix uninitialized padding leak in NFULA_PAYLOAD __build_packet_message() manually constructs the NFULA_PAYLOAD netlink attribute using skb_put() and skb_copy_bits(), bypassing the standard nla_reserve()/nla_put() helpers. While nla_total_size(data_len) bytes are allocated (including NLA alignment padding), only data_len bytes of actual packet data are copied. The trailing nla_padlen(data_len) bytes (1-3 when data_len is not 4-byte aligned) are never initialized, leaking stale heap contents to userspace via the NFLOG netlink socket. Replace the manual attribute construction with nla_reserve(), which handles the tailroom check, header setup, and padding zeroing via __nla_reserve(). The subsequent skb_copy_bits() fills in the payload data on top of the properly initialized attribute.

Rincian

Terbit di NVD

13 April 2026

Terakhir diubah

14 Juli 2026

Status NVD

Modified

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-908: Use of Uninitialized Resource

EPSS (30 hari)

0,18% peluang dieksploitasi; lebih tinggi dari 7,1% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/21d8efda029948d3666b0db5afcc0d36c0984aae patch
• https://git.kernel.org/stable/c/52025ebaa29f4eb4ed8bf92ce83a68f24ab7fdf7 patch
• https://git.kernel.org/stable/c/7eff72968161fb8ddb26113344de3b92fb7d7ef5 patch
• https://git.kernel.org/stable/c/7f3e5d72455936f42709116fabeca3bb216cda62 patch
• https://git.kernel.org/stable/c/a2f6ff3444b663d6cfa63eadd61327a18592885a patch
• https://git.kernel.org/stable/c/a8365d1064ded323797c5e28e91070c52f44b76c patch
• https://git.kernel.org/stable/c/c9f6c51d36482805ac3ffadb9663fe775a13e926 patch
• https://git.kernel.org/stable/c/fc961dd7272b5e4a462999635e44a4770d7f2482 patch
• https://cert-portal.siemens.com/productcert/html/ssa-019113.html
• https://cert-portal.siemens.com/productcert/html/ssa-082556.html