CVE-2026-56123

Katalog CVE

CVSS 9.8 · Critical EPSS 0,31%

Kerentanan Heap-based Buffer Overflow pada dest-unreach socat. Skor CVSS 3.1 9.8 (Critical) menurut NVD.

Deskripsi (NVD)

socat versions 1.8.0.0 through 1.8.1.1 contain a heap-based buffer overflow vulnerability that allows a malicious SOCKS5 proxy server to overwrite adjacent heap memory by exploiting a sign-extension flaw in the DOMAINNAME reply parser. During connection setup, the domain name length byte is read through a signed char field causing a negative bytes_to_read value that is implicitly converted to size_t, resulting in an unbounded heap write into the 262-byte reply buffer with attacker-controlled size and content.

Rincian

Terbit di NVD

25 Juni 2026

Terakhir diubah

26 Juni 2026

Status NVD

Analyzed

CVSS 3.1

9.8 (Critical), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-122: Heap-based Buffer Overflow

EPSS (30 hari)

0,31% peluang dieksploitasi; lebih tinggi dari 22,5% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://www.vulncheck.com/advisories/socat-heap-buffer-overflow-via-socks5-reply-parser advisory pihak ketiga
• http://www.dest-unreach.org/socat/CHANGES release notes