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CVE-2026-58050 on CTRL-OS 26.05

Aliases: CVE-2026-58050

Packages: libssh2

Status: Plausible

Advisory Information

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.

Updates

2026-07-31 18:08 CEST

Metadata changes:

  • Status for package libssh2: “Plausible”

2026-07-31 00:59 CEST

Metadata changes:

  • Status for package libssh2: “New”