PT-2026-44375 · Canonical · Multipass

Espreto · Publicado 2026-05-28 · Atualizado 2026-05-28 · CVE-2026-49237

Mitre

CVSS v3.1

7.8

Alta

Vetor base

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

An issue was discovered in Canonical Multipass for macOS before version 1.16.3 due to an incomplete fix for CVE-2025-5199. While the patch in version 1.16.0 updated the ownership of the multipassd daemon binary to root:wheel, five co-located binaries (multipass, qemu-img, qemu-system-aarch64, qemu-system-x86 64, and sshfs server) in /Library/Application Support/com.canonical.multipass/bin/ retain ownership by the installing user and remain writable. Because the root LaunchDaemon (com.canonical.multipassd.plist) configures a PATH environment variable that prioritizes this user-writable directory and invokes these auxiliary binaries by their bare names, a local attacker can replace an auxiliary binary (such as qemu-img) with a malicious wrapper. When the root daemon subsequently triggers the binary during routine execution (e.g., via multipass launch), the malicious code executes with root privileges, leading to local privilege escalation.

Correção

Incorrect Default Permissions

Enumeração de Fraquezas

CWE-276

Identificadores relacionados

CVE-2026-49237

Produtos afetados

Multipass

Referências · 3

• https://github.com/canonical/multipass/security/advisories/GHSA-r2xg-x32f-23c5 · Aviso do Fabricante
• https://t.me/cveNotify/165050 · Publicação no Telegram
• https://nvd.nist.gov/vuln/detail/CVE-2026-49237 · Nota de Segurança