CVE-2026-50263— Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free information disclosure in createsaverwindow()
Quick assessment
Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
X.Org是X.Org基金会的一个开放源代码的自由软件。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CreateSaverWindow()中的释放后重用问题，可能导致客户端更改窗口属性并强制屏幕保护后触发释放后重用读取，导致信息泄露。
Possible ATT&CK Techniques 1 AI
T1005 · Data from Local SystemAffected Version Matrix 37
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | 0:24.1.9-4.el10_2.2< * |
unaffected |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | 0:24.1.5-6.el10_0.1< * |
unaffected |
| Red Hat | Red Hat Enterprise Linux 6 | any |
unknown |
| Red Hat | Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION | 0:1.1.0-25.el6_10.18< * |
unaffected |
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | 0:1.20.4-35.el7_9< * |
unaffected |
0:1.8.0-36.el7_9.5< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 8 | 0:21.1.3-20.el8_10.2< * |
unaffected |
0:1.20.11-28.el8_10.2< * |
unaffected | ||
0:1.15.0-10.el8_10< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | 0:1.20.10-5.el8_4< * |
unaffected |
0:1.11.0-8.el8_4.16< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | 0:1.20.10-5.el8_4< * |
unaffected |
0:1.11.0-8.el8_4.16< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | 0:1.20.11-8.el8_6< * |
unaffected |
0:21.1.3-2.el8_6.7< * |
unaffected | ||
0:1.12.0-6.el8_6.18< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | 0:1.20.11-8.el8_6< * |
unaffected |
0:21.1.3-2.el8_6.7< * |
unaffected | ||
0:1.12.0-6.el8_6.18< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | 0:1.20.11-19.el8_8< * |
unaffected |
0:21.1.3-13.el8_8.1< * |
unaffected | ||
0:1.12.0-15.el8_8.18< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | 0:1.20.11-19.el8_8< * |
unaffected |
0:21.1.3-13.el8_8.1< * |
unaffected | ||
0:1.12.0-15.el8_8.18< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 9 | 0:24.1.9-4.el9_8.2< * |
unaffected |
0:1.20.11-34.el9_8.2< * |
unaffected | ||
0:1.15.0-7.el9_8.2< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | 0:1.20.11-21.el9_2< * |
unaffected |
0:21.1.3-10.el9_2.1< * |
unaffected | ||
0:1.12.0-14.el9_2.15< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | 0:1.20.11-29.el9_4< * |
unaffected |
0:22.1.9-8.el9_4.1< * |
unaffected | ||
0:1.13.1-8.el9_4.10< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | 0:1.20.11-34.el9_6< * |
unaffected |
0:23.2.7-6.el9_6.1< * |
unaffected | ||
0:1.14.1-11.el9_6< * |
unaffected |
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I. Basic Information for CVE-2026-50263
Vulnerability Information
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Vulnerability Title
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free information disclosure in createsaverwindow()
Source: CVE Program / CVE List V5
Vulnerability Description
A use-after-free flaw was found in the X.Org X server and Xwayland in CreateSaverWindow(). A client can trigger a use-after-free read after changing window attributes and forcing the screen saver, leading to information disclosure.
Source: 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:N
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
X.Org X server和Xwayland 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
X.Org是X.Org基金会的一个开放源代码的自由软件。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CreateSaverWindow()中的释放后重用问题，可能导致客户端更改窗口属性并强制屏幕保护后触发释放后重用读取，导致信息泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | 0:24.1.9-4.el10_2.2 ~ * |
cpe:/o:redhat:enterprise_linux:10.2
|
|
| Red Hat | Red 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 Hat | Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION | 0:1.1.0-25.el6_10.18 ~ * |
cpe:/o:redhat:rhel_els:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | 0:1.20.4-35.el7_9 ~ * |
cpe:/o:redhat:rhel_els:7
|
|
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | 0:1.8.0-36.el7_9.5 ~ * |
cpe:/o:redhat:rhel_els:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 | 0:21.1.3-20.el8_10.2 ~ * |
cpe:/a:redhat:enterprise_linux:8::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8 | 0:1.20.11-28.el8_10.2 ~ * |
cpe:/a:redhat:enterprise_linux:8::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8 | 0:1.15.0-10.el8_10 ~ * |
cpe:/a:redhat:enterprise_linux:8::appstream
|
|
| Red Hat | Red 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 Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | 0:1.11.0-8.el8_4.16 ~ * |
cpe:/a:redhat:rhel_aus:8.4::appstream
|
|
| Red Hat | Red 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 Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | 0:1.11.0-8.el8_4.16 ~ * |
cpe:/a:redhat:rhel_aus:8.4::appstream
|
|
| Red Hat | Red 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 Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | 0:21.1.3-2.el8_6.7 ~ * |
cpe:/a:redhat:rhel_aus:8.6::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | 0:1.12.0-6.el8_6.18 ~ * |
cpe:/a:redhat:rhel_aus:8.6::appstream
|
|
| Red Hat | Red 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 Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | 0:21.1.3-2.el8_6.7 ~ * |
cpe:/a:redhat:rhel_aus:8.6::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | 0:1.12.0-6.el8_6.18 ~ * |
cpe:/a:redhat:rhel_aus:8.6::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | 0:1.20.11-19.el8_8 ~ * |
cpe:/a:redhat:rhel_e4s:8.8::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | 0:21.1.3-13.el8_8.1 ~ * |
cpe:/a:redhat:rhel_e4s:8.8::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | 0:1.12.0-15.el8_8.18 ~ * |
cpe:/a:redhat:rhel_e4s:8.8::appstream
|
|
| Red Hat | Red 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 Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | 0:21.1.3-13.el8_8.1 ~ * |
cpe:/a:redhat:rhel_e4s:8.8::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | 0:1.12.0-15.el8_8.18 ~ * |
cpe:/a:redhat:rhel_e4s:8.8::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 9 | 0:24.1.9-4.el9_8.2 ~ * |
cpe:/a:redhat:enterprise_linux:9::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 9 | 0:1.20.11-34.el9_8.2 ~ * |
cpe:/a:redhat:enterprise_linux:9::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 9 | 0:1.15.0-7.el9_8.2 ~ * |
cpe:/a:redhat:enterprise_linux:9::appstream
|
|
| Red Hat | Red 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 Hat | Red 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 Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | 0:1.12.0-14.el9_2.15 ~ * |
cpe:/a:redhat:rhel_e4s:9.2::appstream
|
|
II. Public POCs for CVE-2026-50263
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-50263
请登录查看更多情报信息。
Patches & Fixes for CVE-2026-50263 (1)
Vendor Advisories for CVE-2026-50263 (26)
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-
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🔗 RHSA-2026:46392 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:46456 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:36087 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:46382 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:26562 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:26566 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:28923 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:46385 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:46460 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:36633 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:36634 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:36086 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:36791 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:36632 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:38502 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:36083 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:36798 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:36085 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:36792 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:46473 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:36768 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
-
🔗 RHSA-2026:46377 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
-
🔗 RHSA-2026:38810 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
Mailing List Discussions for CVE-2026-50263 (1)
Other References for CVE-2026-50263 (4)
Same Patch Batch · Red Hat · 2026-06-05 · 11 CVEs total
| CVE-2026-11332 | 7.8 HIGH | Ansible-core: argument injection in ansible-galaxy role install leads to arbitrary code ex |
| CVE-2026-50256 | 7.8 HIGH | Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in font |
| CVE-2026-50257 | 7.8 HIGH | Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in misyncdestro |
| CVE-2026-50259 | 7.8 HIGH | Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in xkb s |
| CVE-2026-50258 | 7.8 HIGH | Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in xkb k |
| CVE-2026-50260 | 7.8 HIGH | Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in freecounter( |
| CVE-2026-50261 | 7.8 HIGH | Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in syncchangeco |
| CVE-2026-50264 | 7.8 HIGH | Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: out-of-bounds heap write in dr |
| CVE-2026-50262 | 5.5 MEDIUM | Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: out-of-bounds read/write in gl |
| CVE-2026-9088 | 2.7 LOW | Keycloak: keycloak: information disclosure due to user profile permission bypass |
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V. Comments for CVE-2026-50263
No comments yet