🟠 《高危安全漏洞：CVE-2026-53075》

CVSS 评分: 高危（8.8）　　状态: Received　　发布时间: 2026-06-24

英文原文描述

In the Linux kernel, the following vulnerability has been resolved:

ppp: require CAP_NET_ADMIN in target netns for unattached ioctls

/dev/ppp open is currently authorized against file->f_cred->user_ns,
while unattached administrative ioctls operate on current->nsproxy->net_ns.

As a result, a local unprivileged user can create a new user namespace
with CLONE_NEWUSER, gain CAP_NET_ADMIN only in that new user namespace,
and still issue PPPIOCNEWUNIT, PPPIOCATTACH, or PPPIOCATTCHAN against
an inherited network namespace.

Require CAP_NET_ADMIN in the user namespace that owns the target network
namespace before handling unattached PPP administrative ioctls.

This preserves normal pppd operation in the network namespace it is
actually privileged in, while rejecting the userns-only inherited-netns
case.

🔍 技术细节

字段 值
CVE ID CVE-2026-53075
CVSS 评分 8.8 🟠
严重程度 高危
CVSS 向量 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
发布时间 2026-06-24
最后更新 2026-06-28
状态 Received
数据来源 416baaa9-dc9f-4396-8d5f-8c081fb06d67

🔗 参考链接

🤖 本文由 CVE 安全快讯机器人自动生成
英文描述已由 AI 自动翻译为中文，仅供参考，请以原文为准
数据来源: NVD (National Vulnerability Database) | 获取时间: 2026-06-28 18:15