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CVE-2026-50257— X.Org X server和Xwayland 资源管理错误漏洞

CVSS 7.8 · High EPSS 0.14% · P4

影响版本矩阵 24

厂商产品版本范围状态
Red HatRed Hat Enterprise Linux 100:24.1.9-4.el10_2.2< *unaffected
Red HatRed Hat Enterprise Linux 10.0 Extended Update Support0:24.1.5-6.el10_0.1< *unaffected
Red HatRed Hat Enterprise Linux 6全部affected
全部unknown
Red HatRed Hat Enterprise Linux 7全部affected
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle Support0:1.20.4-35.el7_9< *unaffected
Red HatRed Hat Enterprise Linux 80:21.1.3-20.el8_10.2< *unaffected
0:1.20.11-28.el8_10.2< *unaffected
0:1.15.0-10.el8_10< *unaffected
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support0:1.20.10-5.el8_4< *unaffected
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On0:1.20.10-5.el8_4< *unaffected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support0:1.20.11-8.el8_6< *unaffected
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On0:1.20.11-8.el8_6< *unaffected
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Service0:1.20.11-19.el8_8< *unaffected
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutions0:1.20.11-19.el8_8< *unaffected
Red HatRed Hat Enterprise Linux 90:24.1.9-4.el9_8.2< *unaffected
0:1.20.11-34.el9_8.2< *unaffected
0:1.15.0-7.el9_8.2< *unaffected
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutions0:1.20.11-21.el9_2< *unaffected
0:21.1.3-10.el9_2.1< *unaffected
Red HatRed Hat Enterprise Linux 9.4 Update Services for SAP Solutions0:1.20.11-29.el9_4< *unaffected
0:22.1.9-8.el9_4.1< *unaffected
Red HatRed Hat Enterprise Linux 9.6 Extended Update Support0:1.20.11-34.el9_6< *unaffected
0:23.2.7-6.el9_6.1< *unaffected
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一、 漏洞 CVE-2026-50257 基础信息

漏洞信息
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Vulnerability Title
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in misyncdestroyfence()
来源: 美国国家漏洞数据库 NVD
Vulnerability Description
A use-after-free flaw was found in the X.Org X server and Xwayland in miSyncDestroyFence(). A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacker would connect to the X server to set up a fence and await that fence, then a second X connection destroys the fence, causing the use-after-free. This may be used to crash the server, or for privilege escalation if the X server runs as root.
来源: 美国国家漏洞数据库 NVD
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
来源: 美国国家漏洞数据库 NVD
Vulnerability Type
释放后使用
来源: 美国国家漏洞数据库 NVD
Vulnerability Title
X.Org X server和Xwayland 资源管理错误漏洞
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。Xwayland是Xwayland开源的一个通信协议，规定了显示服务器与其客户机之间的通信方式。 X.Org X server和Xwayland存在资源管理错误漏洞，该漏洞源于miSyncDestroyFence中存在释放后重用，可能导致服务器崩溃或权限提升。
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

厂商产品影响版本CPE订阅
Red HatRed Hat Enterprise Linux 10 0:24.1.9-4.el10_2.2 ~ * cpe:/o:redhat:enterprise_linux:10.2
Red HatRed Hat Enterprise Linux 10.0 Extended Update Support 0:24.1.5-6.el10_0.1 ~ * cpe:/o:redhat:enterprise_linux_eus:10.0
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle Support 0:1.20.4-35.el7_9 ~ * cpe:/o:redhat:rhel_els:7
Red HatRed Hat Enterprise Linux 8 0:21.1.3-20.el8_10.2 ~ * cpe:/a:redhat:enterprise_linux:8::appstream
Red HatRed Hat Enterprise Linux 8 0:1.20.11-28.el8_10.2 ~ * cpe:/a:redhat:enterprise_linux:8::appstream
Red HatRed Hat Enterprise Linux 8 0:1.15.0-10.el8_10 ~ * cpe:/a:redhat:enterprise_linux:8::appstream
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:1.20.10-5.el8_4 ~ * cpe:/a:redhat:rhel_aus:8.4::appstream
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:1.20.10-5.el8_4 ~ * cpe:/a:redhat:rhel_aus:8.4::appstream
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:1.20.11-8.el8_6 ~ * cpe:/a:redhat:rhel_aus:8.6::appstream
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:1.20.11-8.el8_6 ~ * cpe:/a:redhat:rhel_aus:8.6::appstream
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Service 0:1.20.11-19.el8_8 ~ * cpe:/a:redhat:rhel_e4s:8.8::appstream
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:1.20.11-19.el8_8 ~ * cpe:/a:redhat:rhel_e4s:8.8::appstream
Red HatRed Hat Enterprise Linux 9 0:24.1.9-4.el9_8.2 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red HatRed Hat Enterprise Linux 9 0:1.20.11-34.el9_8.2 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red HatRed Hat Enterprise Linux 9 0:1.15.0-7.el9_8.2 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:1.20.11-21.el9_2 ~ * cpe:/a:redhat:rhel_e4s:9.2::appstream
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:21.1.3-10.el9_2.1 ~ * cpe:/a:redhat:rhel_e4s:9.2::appstream
Red HatRed Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:1.20.11-29.el9_4 ~ * cpe:/a:redhat:rhel_e4s:9.4::appstream
Red HatRed Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:22.1.9-8.el9_4.1 ~ * cpe:/a:redhat:rhel_e4s:9.4::appstream
Red HatRed Hat Enterprise Linux 9.6 Extended Update Support 0:1.20.11-34.el9_6 ~ * cpe:/a:redhat:rhel_eus:9.6::appstream
Red HatRed Hat Enterprise Linux 9.6 Extended Update Support 0:23.2.7-6.el9_6.1 ~ * cpe:/a:redhat:rhel_eus:9.6::appstream
Red HatRed Hat Enterprise Linux 6-cpe:/o:redhat:enterprise_linux:6
Red HatRed Hat Enterprise Linux 6-cpe:/o:redhat:enterprise_linux:6
Red HatRed Hat Enterprise Linux 7-cpe:/o:redhat:enterprise_linux:7

二、漏洞 CVE-2026-50257 的公开POC

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三、漏洞 CVE-2026-50257 的情报信息

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CVE-2026-50257 补丁与修复 (1)

CVE-2026-50257 厂商安全公告 (16)

CVE-2026-50257 邮件列表归档 (1)

CVE-2026-50257 其他参考 (4)

同批安全公告 · Red Hat · 2026-06-05 · 共 11 条

CVE-2026-113327.8 HIGHAnsible 参数注入漏洞
CVE-2026-502567.8 HIGHX.Org X server和Xwayland 安全漏洞
CVE-2026-502597.8 HIGHX.Org X server和Xwayland 安全漏洞
CVE-2026-502587.8 HIGHX.Org X server和Xwayland 安全漏洞
CVE-2026-502607.8 HIGHX.Org X server和Xwayland 资源管理错误漏洞
CVE-2026-502617.8 HIGHX.Org X server和Xwayland 资源管理错误漏洞
CVE-2026-502647.8 HIGHX.Org X server和Xwayland 缓冲区错误漏洞
CVE-2026-502625.5 MEDIUMX.Org X server和Xwayland 缓冲区错误漏洞
CVE-2026-502635.5 MEDIUMX.Org X server和Xwayland 资源管理错误漏洞
CVE-2026-90882.7 LOWKeycloak 安全漏洞

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-416

V. Comments for CVE-2026-50257

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