PT-2026-53082 · Undefined · Undefined

Publicado 2026-06-28 · Atualizado 2026-06-28 · CVE-2026-58050

NVD

CVSS v3.1

7.0

Alta

Vetor base

AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H

libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem response and uses it in the allocation num attrs * sizeof(libssh2 publickey attribute) without bounds checking, so on 32-bit platforms the multiplication overflows to an undersized buffer. A malicious SSH server can then drive the attribute-parsing loop to write past the allocation, causing a heap buffer overflow in a connecting libssh2 client.

Exploit

Correção

Integer Overflow

Enumeração de Fraquezas

CWE-190

Identificadores relacionados

CVE-2026-58050

Produtos afetados

Undefined

Referências · 4

• 🔥 https://github.com/bikini/exploitarium/tree/main/libssh2-publickey-list-calc-poc · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-58050 · Nota de Segurança
• https://vulncheck.com/advisories/libssh2-integer-overflow-in-publickey-subsystem-attribute-allocation · Nota
• https://github.com/libssh2/libssh2/blob/master/src/publickey.c · Nota