RHSA-2026:0033

Vulnerability from csaf_redhat - Published: 2026-01-05 06:18 - Updated: 2026-01-05 10:10
Summary
Red Hat Security Advisory: xorg-x11-server-Xwayland security update

Notes

Topic
An update for xorg-x11-server-Xwayland is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
Xwayland is an X server for running X clients under Wayland. Security Fix(es): * xorg: xmayland: Use-after-free in XPresentNotify structure creation (CVE-2025-62229) * xorg: xwayland: Use-after-free in Xkb client resource removal (CVE-2025-62230) * xorg: xmayland: Value overflow in XkbSetCompatMap() (CVE-2025-62231) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
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  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Jan-Niklas Sohn"
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          "organization": "Trend Micro Zero Day Initiative"
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      "cve": "CVE-2025-62229",
      "cwe": {
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        "name": "Use After Free"
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          "category": "description",
          "text": "A flaw was found in the X.Org X server and Xwayland when processing X11 Present extension notifications. Improper error handling during notification creation can leave dangling pointers that lead to a use-after-free condition. This can cause memory corruption or a crash, potentially allowing an attacker to execute arbitrary code or cause a denial of service.",
          "title": "Vulnerability description"
        },
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          "text": "xorg: xmayland: Use-after-free in XPresentNotify structure creation",
          "title": "Vulnerability summary"
        },
        {
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          "text": "The Red Hat Product Security team has rated this vulnerability as Moderate. The flaw is a use-after-free in X11 Present notification handling that could lead to integrity and availability impacts if exploited. Moreover, the X.Org server does not run with root privileges in Red Hat Enterprise Linux 8 and 9, limiting the potential impact and preventing system-wide compromise.",
          "title": "Statement"
        },
        {
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          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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            "AppStream-8.8.0.Z.E4S:xorg-x11-server-Xwayland-debuginfo-0:21.1.3-12.el8_8.ppc64le",
            "AppStream-8.8.0.Z.E4S:xorg-x11-server-Xwayland-debuginfo-0:21.1.3-12.el8_8.x86_64",
            "AppStream-8.8.0.Z.E4S:xorg-x11-server-Xwayland-debugsource-0:21.1.3-12.el8_8.ppc64le",
            "AppStream-8.8.0.Z.E4S:xorg-x11-server-Xwayland-debugsource-0:21.1.3-12.el8_8.x86_64",
            "AppStream-8.8.0.Z.TUS:xorg-x11-server-Xwayland-0:21.1.3-12.el8_8.src",
            "AppStream-8.8.0.Z.TUS:xorg-x11-server-Xwayland-0:21.1.3-12.el8_8.x86_64",
            "AppStream-8.8.0.Z.TUS:xorg-x11-server-Xwayland-debuginfo-0:21.1.3-12.el8_8.x86_64",
            "AppStream-8.8.0.Z.TUS:xorg-x11-server-Xwayland-debugsource-0:21.1.3-12.el8_8.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H",
            "version": "3.1"
          },
          "products": [
            "AppStream-8.8.0.Z.E4S:xorg-x11-server-Xwayland-0:21.1.3-12.el8_8.ppc64le",
            "AppStream-8.8.0.Z.E4S:xorg-x11-server-Xwayland-0:21.1.3-12.el8_8.src",
            "AppStream-8.8.0.Z.E4S:xorg-x11-server-Xwayland-0:21.1.3-12.el8_8.x86_64",
            "AppStream-8.8.0.Z.E4S:xorg-x11-server-Xwayland-debuginfo-0:21.1.3-12.el8_8.ppc64le",
            "AppStream-8.8.0.Z.E4S:xorg-x11-server-Xwayland-debuginfo-0:21.1.3-12.el8_8.x86_64",
            "AppStream-8.8.0.Z.E4S:xorg-x11-server-Xwayland-debugsource-0:21.1.3-12.el8_8.ppc64le",
            "AppStream-8.8.0.Z.E4S:xorg-x11-server-Xwayland-debugsource-0:21.1.3-12.el8_8.x86_64",
            "AppStream-8.8.0.Z.TUS:xorg-x11-server-Xwayland-0:21.1.3-12.el8_8.src",
            "AppStream-8.8.0.Z.TUS:xorg-x11-server-Xwayland-0:21.1.3-12.el8_8.x86_64",
            "AppStream-8.8.0.Z.TUS:xorg-x11-server-Xwayland-debuginfo-0:21.1.3-12.el8_8.x86_64",
            "AppStream-8.8.0.Z.TUS:xorg-x11-server-Xwayland-debugsource-0:21.1.3-12.el8_8.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "xorg: xmayland: Value overflow in XkbSetCompatMap()"
    }
  ]
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.