CVE-2026-8933— Canonical snapd 权限许可和访问控制问题漏洞

snap-confine Local Privilege Escalation via Capabilities Misconfiguration or Flaw in Execution Environment Setup

A local privilege escalation vulnerability exists in snap-confine, a set-capabilities core component used internally by Canonical snapd to construct the secure execution environment for snap applications. This vulnerability uniquely affects versions of snap-confine configured with set-capabilities (rather than standard set-uid-root installations). Due to a flaw in how privilege boundaries or security sandboxes are initialized when the binary runs under limited ambient capabilities, a local, unprivileged attacker can exploit this behavior to bypass intended restrictions and execute arbitrary code. Successful exploitation allows the local user to elevate their privileges to full root authority.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

带着不必要的权限执行

Canonical snapd 权限许可和访问控制问题漏洞

Canonical snapd是英国Canonical公司开源的一个跨平台包管理工具。 Canonical snapd 2.75.0版本至2.76.1之前版本存在权限许可和访问控制问题漏洞，该漏洞源于snap-confine组件初始化权限边界或安全沙箱时存在缺陷，可能导致本地低权限攻击者绕过限制并执行任意代码，成功利用此漏洞可将权限提升至root。

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