CVE-2026-40170

Katalog CVE

CVSS 7.5 · High EPSS 0,96%

Kerentanan Stack-based Buffer Overflow pada tatsuhiro-t ngtcp2. Skor CVSS 3.1 7.5 (High) menurut github.com.

Deskripsi (NVD)

ngtcp2 is a C implementation of the IETF QUIC protocol. In versions prior to 1.22.1, ngtcp2_qlog_parameters_set_transport_params() serializes peer transport parameters into a fixed 1024-byte stack buffer without bounds checking. When qlog is enabled, a remote peer can send sufficiently large transport parameters during the QUIC handshake to cause writes beyond the buffer boundary, resulting in a stack buffer overflow. This affects deployments that enable the qlog callback and process untrusted peer transport parameters. This issue has been fixed in version 1.22.1. If developers are unable to immediately upgrade, they can disable the qlog on client.

Rincian

Terbit di NVD

16 April 2026

Terakhir diubah

15 Juli 2026

Status NVD

Modified

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-121: Stack-based Buffer Overflow
CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

EPSS (30 hari)

0,96% peluang dieksploitasi; lebih tinggi dari 60,3% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/ngtcp2/ngtcp2/security/advisories/GHSA-f523-465f-8c8f exploit · mitigasi · patch · advisory vendor
• https://github.com/ngtcp2/ngtcp2/commit/708a7640c1f48fb8ffb540c4b8ea5b4c1dfb8ee5 patch
• http://www.openwall.com/lists/oss-security/2026/04/17/12 exploit · mailing list · mitigasi · patch
• https://access.redhat.com/errata/RHSA-2026:22963
• https://access.redhat.com/errata/RHSA-2026:25049
• https://access.redhat.com/errata/RHSA-2026:9113
• https://access.redhat.com/security/cve/CVE-2026-40170
• https://bugzilla.redhat.com/show_bug.cgi?id=2459061
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40170.json