{
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      "text": "Important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
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        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "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 Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
      },
      {
        "category": "details",
        "text": "CVE-2023-3138: prevent out-of-bounds writes in XQueryExtension responses within\n  Display struct",
        "title": "Details"
      }
    ],
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      }
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        "date": "2026-02-16T09:20:04Z",
        "engine": {
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      "id": "CLSA-2025:1745270046",
      "initial_release_date": "2025-04-21T21:14:08Z",
      "revision_history": [
        {
          "date": "2025-04-21T21:14:08Z",
          "number": "1",
          "summary": "Initial version"
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        {
          "date": "2025-05-19T15:30:49Z",
          "number": "2",
          "summary": "Official Publication"
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        {
          "date": "2026-02-16T09:20:04Z",
          "number": "3",
          "summary": "Update document"
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      "status": "final",
      "version": "3"
    },
    "title": "libX11: Fix of CVE-2023-3138"
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      "cwe": {
        "id": "CWE-119",
        "name": "Improper Restriction of Operations within the Bounds of a Memory Buffer"
      },
      "notes": [
        {
          "category": "description",
          "text": "A vulnerability was found in libX11. The security flaw occurs because the functions in src/InitExt.c in libX11 do not check that the values provided for the Request, Event, or Error IDs are within the bounds of the arrays that those functions write to, using those IDs as array indexes. They trust that they were called with values provided by an Xserver adhering to the bounds specified in the X11 protocol, as all X servers provided by X.Org do. As the protocol only specifies a single byte for these values, an out-of-bounds value provided by a malicious server (or a malicious proxy-in-the-middle) can only overwrite other portions of the Display structure and not write outside the bounds of the Display structure itself, possibly causing the client to crash with this memory corruption.",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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          "AlmaLinux-9.2:libX11-0:1.7.0-7.el9.tuxcare.els1.x86_64",
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          "AlmaLinux-9.2:libX11-xcb-0:1.7.0-7.el9.tuxcare.els1.x86_64"
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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2023-3138"
        },
        {
          "category": "external",
          "summary": "https://access.redhat.com/security/cve/CVE-2023-3138",
          "url": "https://access.redhat.com/security/cve/CVE-2023-3138"
        },
        {
          "category": "external",
          "summary": "https://gitlab.freedesktop.org/xorg/lib/libx11/-/commit/304a654a0d57bf0f00d8998185f0360332cfa36c",
          "url": "https://gitlab.freedesktop.org/xorg/lib/libx11/-/commit/304a654a0d57bf0f00d8998185f0360332cfa36c"
        },
        {
          "category": "external",
          "summary": "https://lists.x.org/archives/xorg-announce/2023-June/003406.html",
          "url": "https://lists.x.org/archives/xorg-announce/2023-June/003406.html"
        },
        {
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          "summary": "https://lists.x.org/archives/xorg-announce/2023-June/003407.html",
          "url": "https://lists.x.org/archives/xorg-announce/2023-June/003407.html"
        },
        {
          "category": "external",
          "summary": "https://security.netapp.com/advisory/ntap-20231208-0008/",
          "url": "https://security.netapp.com/advisory/ntap-20231208-0008/"
        }
      ],
      "release_date": "2023-06-28T21:15:00Z",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2025-04-21T21:14:08Z",
          "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2025:1745270046",
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            "AlmaLinux-9.2:libX11-0:1.7.0-7.el9.tuxcare.els1.x86_64",
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        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
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      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
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    }
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}