ALSA-2026:85191 (CVE-2026-88812)

Vulnerability from osv_almalinux – Published: 2026-10-19 00:00 – Updated: 2026-10-20 09:09 – Source website
VLAI
Summary
Important: xorg-x11-server-Xwayland security update
Details

Xwayland is an X server for running X clients under Wayland.

Security Fix(es):

  • xorg-x11-server: xorg-x11-server: Arbitrary code execution via use-after-free in passive grab handling (CVE-2026-93516)
  • xorg-x11-server: xorg-x11-server: Privilege escalation via crafted RandR provider property requests (CVE-2026-93521)
  • xorg-x11-server: xwayland: xorg-x11-server: Arbitrary code execution via double-free in XKB geometry handling (CVE-2026-88812)
  • xorg-x11-server: xorg-x11-server: Out-of-bounds write via unvalidated modifier in ProcXIPassiveUngrabDevice (CVE-2026-93523)
  • xorg-x11-server: glamor: size tmp_bits buffer for source coordinate range in upload_boxes (CVE-2026-93522)
  • xorg-x11-server: xorg-x11-server: arbitrary code execution via GLX RenderLarge heap-based buffer overflow (CVE-2026-93517)
  • xorg-x11-server: xorg-x11-server: arbitrary code execution via integer truncation during keyboard mapping resize (CVE-2026-93518)
  • xorg-x11-server: xorg-x11-server: Arbitrary code execution via buffer overflow in input_constrain_cursor() (CVE-2026-93519)
  • xorg-x11-server: xorg-x11-server: arbitrary code execution via out-of-bounds write in XKB keycode handling (CVE-2026-93520)

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.

References
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "xorg-x11-server-Xwayland"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "24.1.9-4.el10_2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "xorg-x11-server-Xwayland-devel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "24.1.9-4.el10_2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "Xwayland is an X server for running X clients under Wayland.  \n\nSecurity Fix(es):  \n\n  * xorg-x11-server: xorg-x11-server: Arbitrary code execution via use-after-free in passive grab handling (CVE-2026-93516)\n  * xorg-x11-server: xorg-x11-server: Privilege escalation via crafted RandR provider property requests (CVE-2026-93521)\n  * xorg-x11-server: xwayland: xorg-x11-server: Arbitrary code execution via double-free in XKB geometry handling (CVE-2026-88812)\n  * xorg-x11-server: xorg-x11-server: Out-of-bounds write via unvalidated modifier in ProcXIPassiveUngrabDevice (CVE-2026-93523)\n  * xorg-x11-server: glamor: size tmp_bits buffer for source coordinate range in upload_boxes (CVE-2026-93522)\n  * xorg-x11-server: xorg-x11-server: arbitrary code execution via GLX RenderLarge heap-based buffer overflow (CVE-2026-93517)\n  * xorg-x11-server: xorg-x11-server: arbitrary code execution via integer truncation during keyboard mapping resize (CVE-2026-93518)\n  * xorg-x11-server: xorg-x11-server: Arbitrary code execution via buffer overflow in input_constrain_cursor() (CVE-2026-93519)\n  * xorg-x11-server: xorg-x11-server: arbitrary code execution via out-of-bounds write in XKB keycode handling (CVE-2026-93520)\n\n\nFor 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.\n",
  "id": "ALSA-2026:85191",
  "modified": "2026-10-20T09:09:45Z",
  "published": "2026-10-19T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:85191"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-88812"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-93516"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-93517"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-93518"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-93519"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-93520"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-93521"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-93522"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-93523"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2545161"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2545164"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2545174"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2545177"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2545178"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2545246"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2545860"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2545887"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2545908"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/10/ALSA-2026-85191.html"
    }
  ],
  "related": [
    "CVE-2026-88812",
    "CVE-2026-93516",
    "CVE-2026-93517",
    "CVE-2026-93518",
    "CVE-2026-93519",
    "CVE-2026-93520",
    "CVE-2026-93521",
    "CVE-2026-93522",
    "CVE-2026-93523"
  ],
  "schema_version": "1.7.0",
  "summary": "Important: xorg-x11-server-Xwayland security update",
  "upstream": [
    "CVE-2026-88812",
    "CVE-2026-93516",
    "CVE-2026-93517",
    "CVE-2026-93518",
    "CVE-2026-93519",
    "CVE-2026-93520",
    "CVE-2026-93521",
    "CVE-2026-93522",
    "CVE-2026-93523"
  ]
}



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