Important: xorg-x11-server-Xwayland security update

{
  "id": "f1df65af1651d5f435d437cb434e3bc8090e5fe5b0c1a2f77c792d1a9536146a",
  "url": "https://osv.dev/vulnerability/RLSA-2026%3A85191",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Important: xorg-x11-server-Xwayland security update",
    "summary": "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.",
    "evidence": "osv:RLSA-2026:85191",
    "products": [
      {
        "name": {
          "value": "xorg-x11-server-Xwayland",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "0:24.1.9-4.el10_2.4",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "RLSA-2026:85191",
      "aliases": [
        "RLSA-2026:85191"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "0:24.1.9-4.el10_2.4"
                }
              ],
              "database_specific": {
                "yum_repository": "AppStream"
              }
            }
          ],
          "package": {
            "name": "xorg-x11-server-Xwayland",
            "purl": "pkg:rpm/rocky-linux/xorg-x11-server-Xwayland?distro=rocky-linux-10&epoch=0",
            "ecosystem": "Rocky Linux:10"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/resf-osv-data/RLSA-2026:85191.json"
          }
        }
      ],
      "modified": "2026-10-20T12:15:37.991033197Z",
      "provider": "osv",
      "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"
      ],
      "references": [
        "https://errata.rockylinux.org/RLSA-2026:85191",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2545161",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2545164",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2545174",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2545177",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2545178",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2545246",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2545860",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2545887",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2545908",
        "https://access.redhat.com/errata/RHSA-2026:85191"
      ],
      "provider_metadata": {
        "license": "CC-BY-4.0",
        "license_url": "https://creativecommons.org/licenses/by/4.0/",
        "source_advisory": "RHSA-2026:85191"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-88812",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-93516",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-93517",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-93518",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-93519",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-93520",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-93521",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-93522",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-93523",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 387266,
  "published_at": "2026-10-20T12:10:14.939262+00:00"
}