CVE-2026-96512— Sudo TZ环境变量绕过时间授权漏洞
一分钟漏洞结论
影响对象
Red Hat Red Hat Enterprise Linux 10
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
A flaw was found in sudo. When sudoers rules use NOTBEFORE or NOTAFTER time-based access restrictions with timestamps that omit the trailing 'Z' timezone indicator, the time evaluation relies on the TZ environment variable inherited from the calling user. Beca
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一、 漏洞 CVE-2026-96512 基础信息
漏洞信息
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Vulnerability Title
Sudo: sudo: tz environment variable allows bypass of notbefore/notafter time-based authorization
来源: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in sudo. When sudoers rules use NOTBEFORE or NOTAFTER time-based access restrictions with timestamps that omit the trailing 'Z' timezone indicator, the time evaluation relies on the TZ environment variable inherited from the calling user. Because sudo is a setuid-root program, an unprivileged local user can set TZ to an extreme timezone offset to shift the authorization window by up to approximately 25 hours, causing expired rules to be treated as valid. This allows the user to execute commands outside the intended time window. Authentication is not bypassed; only the time-based authorization check is affected.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | - |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 7 | - |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 | - |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 | - |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat Hardened Images | - |
cpe:/a:redhat:hummingbird:1
|
|
二、漏洞 CVE-2026-96512 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-96512 补丁与修复 (1)
CVE-2026-96512 厂商安全公告 (2)
同批安全公告 · Red Hat · 2026-09-23 · 共 6 条
| CVE-2026-96275 | 8.8 HIGH | Flatpak 额外数据提取导致的 root 任意写漏洞 |
| CVE-2026-96442 | 7.8 HIGH | Emacs 5.3920 修复不完整致远程代码执行 |
| CVE-2026-96445 | 6.8 MEDIUM | Keycloak 代理头部条件OTP绕过漏洞 |
| CVE-2026-96446 | 4.2 MEDIUM | Keycloak prompt=none 静默认证路径单用绕过漏洞 |
| CVE-2026-96276 | Flatpak build-init任意写漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-96512
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