CVE-2026-55213

Katalog CVE

CVSS 7.5 · High EPSS 0,49%

Kerentanan Memory Allocation with Excessive Size Value. Skor CVSS 3.1 7.5 (High) menurut github.com.

Deskripsi (NVD)

h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit edd7a120bfc4af11ac0cbebce2a43cc1f93f9af1, when h2o processes a QPACK instruction sent from the peer over HTTP/3, lib/http3/qpack.c might allocate an on-stack buffer as large as approximately 800 KB by calling alloca, which exceeds the default pthread stack size used by musl libc and causes the h2o server to crash with a segmentation fault while touching the guard page. This issue is fixed in commit edd7a120bfc4af11ac0cbebce2a43cc1f93f9af1.

Rincian

Terbit di NVD

10 Juli 2026

Terakhir diubah

13 Juli 2026

Status NVD

Awaiting Analysis

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-789: Memory Allocation with Excessive Size Value

EPSS (30 hari)

0,49% peluang dieksploitasi; lebih tinggi dari 40,2% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://github.com/h2o/h2o/commit/edd7a120bfc4af11ac0cbebce2a43cc1f93f9af1
• https://github.com/h2o/h2o/security/advisories/GHSA-432c-8xmj-frmq