CVE-2026-34000— X.Org X Server 缓冲区错误漏洞
一分钟漏洞结论
影响对象
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
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。
X.Org X Server是X.Org基金会的一款X Window系统显示服务器。 X.Org X server存在缓冲区错误漏洞，该漏洞源于XKB几何处理中CheckSetGeom和XkbAddGeomKeyAlias函数存在越界读取，可能导致内存内容泄露或服务器崩溃。
影响版本矩阵 42
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | 全部 |
affected |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | 0:24.1.5-6.el10_0< * |
unaffected |
| Red Hat | Red Hat Enterprise Linux 6 | 全部 |
unknown |
| Red Hat | Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION | 0:1.1.0-25.el6_10.16< * |
unaffected |
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | 0:1.20.4-34.el7_9< * |
unaffected |
0:1.8.0-36.el7_9.4< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 8 | 全部 |
affected |
全部 |
affected | ||
全部 |
affected | ||
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | 0:1.20.10-4.el8_4< * |
unaffected |
0:1.11.0-8.el8_4.15< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | 0:1.20.10-4.el8_4< * |
unaffected |
0:1.11.0-8.el8_4.15< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | 0:21.1.3-2.el8_6.6< * |
unaffected |
0:1.20.11-7.el8_6< * |
unaffected | ||
0:1.12.0-6.el8_6.17< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | 0:1.12.0-6.el8_6.17< * |
unaffected |
| Red Hat | Red Hat Enterprise Linux 8.6 Telecommunications Update Service | 0:21.1.3-2.el8_6.6< * |
unaffected |
0:1.20.11-7.el8_6< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions | 0:21.1.3-2.el8_6.6< * |
unaffected |
0:1.20.11-7.el8_6< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | 0:21.1.3-13.el8_8< * |
unaffected |
0:1.20.11-18.el8_8< * |
unaffected | ||
0:1.12.0-15.el8_8.17< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | 0:21.1.3-13.el8_8< * |
unaffected |
0:1.20.11-18.el8_8< * |
unaffected | ||
0:1.12.0-15.el8_8.17< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 9 | 0:1.15.0-7.el9_8.1< * |
unaffected |
全部 |
affected | ||
全部 |
affected | ||
| Red Hat | Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions | 0:21.1.3-5.el9_0< * |
unaffected |
0:1.20.11-13.el9_0< * |
unaffected | ||
0:1.11.0-22.el9_0.17< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | 0:21.1.3-10.el9_2< * |
unaffected |
0:1.20.11-20.el9_2< * |
unaffected | ||
0:1.12.0-14.el9_2.14< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | 0:1.20.11-28.el9_4< * |
unaffected |
0:22.1.9-8.el9_4< * |
unaffected | ||
0:1.13.1-8.el9_4.9< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | 0:1.20.11-33.el9_6< * |
unaffected |
0:23.2.7-6.el9_6< * |
unaffected | ||
0:1.14.1-10.el9_6< * |
unaffected |
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一、 漏洞 CVE-2026-34000 基础信息
漏洞信息
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Vulnerability Title
Xwayland: xorg: x.org x server: information disclosure and denial of service via out-of-bounds read in xkb geometry processing.
来源: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the X.Org X server. This out-of-bounds read vulnerability in the XKB geometry processing, specifically within the `CheckSetGeom()` and `XkbAddGeomKeyAlias` functions, allows an attacker to read uninitialized or out-of-bounds memory. An attacker with a connection to the X11 server, either locally or remotely, can exploit this without user interaction. This could lead to the disclosure of memory contents or cause a denial of service by crashing the server.
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:N/A:L
来源: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
来源: CVE Program / CVE List V5
Vulnerability Title
X.Org X Server 缓冲区错误漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
X.Org X Server是X.Org基金会的一款X Window系统显示服务器。 X.Org X server存在缓冲区错误漏洞，该漏洞源于XKB几何处理中CheckSetGeom和XkbAddGeomKeyAlias函数存在越界读取，可能导致内存内容泄露或服务器崩溃。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2026-34000 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-34000 厂商安全公告 (13)
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🔗 RHSA-2026:21718 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:23254 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:24341 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:19342 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:20560 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:20558 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:20563 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:20561 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:20557 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisory x_refsource_REDHAT
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CVE-2026-34000 其他参考 (14)
同批安全公告 · Red Hat · 2026-05-05 · 共 3 条
| CVE-2026-34002 | 6.1 MEDIUM | X.Org X Server 安全漏洞 |
| CVE-2026-34956 | 5.9 MEDIUM | Open vSwitch 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-34000
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