CVE-2026-55490

Katalog CVE

CVSS 6.5 · Medium EPSS 0,68%

Kerentanan Integer Underflow (Wrap or Wraparound) pada openwrt. Skor CVSS 3.1 6.5 (Medium) menurut github.com.

Deskripsi (NVD)

OpenWrt is a Linux operating system targeting embedded devices. Before v25.12.5, an integer underflow in handle_send_a() of the Emergency Access Daemon allows any unauthenticated attacker on the local network to crash the daemon by sending a single crafted UDP packet. The message length underflows before a bounds check and is then passed to memcpy as a very large size. This issue is fixed v25.12.5.

Rincian

Terbit di NVD

7 Juli 2026

Terakhir diubah

10 Juli 2026

Status NVD

Analyzed

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-191: Integer Underflow (Wrap or Wraparound)

EPSS (30 hari)

0,68% peluang dieksploitasi; lebih tinggi dari 51,2% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/openwrt/openwrt/security/advisories/GHSA-9558-77jp-g3fw exploit · advisory vendor
• https://github.com/openwrt/openwrt/commit/63c0767f3d02f7b10b0f0b5293366bd059a08ca5 patch
• https://github.com/openwrt/openwrt/releases/tag/v25.12.5 release notes