CVE-2025-6021 (GCVE-0-2025-6021)
Vulnerability from cvelistv5
Published
2025-06-12 12:49
Modified
2025-10-27 17:47
CWE
  • CWE-121 - Stack-based Buffer Overflow
Summary
A flaw was found in libxml2's xmlBuildQName function, where integer overflows in buffer size calculations can lead to a stack-based buffer overflow. This issue can result in memory corruption or a denial of service when processing crafted input.
References
secalert@redhat.com https://access.redhat.com/errata/RHSA-2025:10630 Third Party Advisory
secalert@redhat.com https://access.redhat.com/errata/RHSA-2025:10698 Third Party Advisory
secalert@redhat.com https://access.redhat.com/errata/RHSA-2025:10699 Third Party Advisory
secalert@redhat.com https://access.redhat.com/errata/RHSA-2025:11580 Third Party Advisory
secalert@redhat.com https://access.redhat.com/errata/RHSA-2025:12098 Third Party Advisory
secalert@redhat.com https://access.redhat.com/errata/RHSA-2025:12099 Third Party Advisory
secalert@redhat.com https://access.redhat.com/errata/RHSA-2025:12199 Third Party Advisory
secalert@redhat.com https://access.redhat.com/errata/RHSA-2025:12237 Third Party Advisory
secalert@redhat.com https://access.redhat.com/errata/RHSA-2025:12239 Third Party Advisory
secalert@redhat.com https://access.redhat.com/errata/RHSA-2025:12240 Third Party Advisory
secalert@redhat.com https://access.redhat.com/errata/RHSA-2025:12241 Third Party Advisory
secalert@redhat.com https://access.redhat.com/errata/RHSA-2025:13267 Third Party Advisory
secalert@redhat.com https://access.redhat.com/errata/RHSA-2025:13289 Third Party Advisory
secalert@redhat.com https://access.redhat.com/errata/RHSA-2025:13325 Third Party Advisory
secalert@redhat.com https://access.redhat.com/errata/RHSA-2025:13335 Third Party Advisory
secalert@redhat.com https://access.redhat.com/errata/RHSA-2025:13336 Third Party Advisory
secalert@redhat.com https://access.redhat.com/errata/RHSA-2025:14059 Third Party Advisory
secalert@redhat.com https://access.redhat.com/errata/RHSA-2025:14396 Third Party Advisory
secalert@redhat.com https://access.redhat.com/errata/RHSA-2025:15308 Third Party Advisory
secalert@redhat.com https://access.redhat.com/errata/RHSA-2025:15672 Third Party Advisory
secalert@redhat.com https://access.redhat.com/errata/RHSA-2025:19020
secalert@redhat.com https://access.redhat.com/security/cve/CVE-2025-6021 Third Party Advisory
secalert@redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2372406 Issue Tracking
134c704f-9b21-4f2e-91b3-4a467353bcc0 https://gitlab.gnome.org/GNOME/libxml2/-/issues/926 Exploit, Issue Tracking, Vendor Advisory
Impacted products
Vendor Product Version
Version: 0   
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   Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:2.12.5-7.el10_0   < *
    cpe:/o:redhat:enterprise_linux:10.0
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   Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support Unaffected: 0:2.9.1-6.el7_9.10   < *
    cpe:/o:redhat:rhel_els:7
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   Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:2.9.7-21.el8_10.1   < *
    cpe:/o:redhat:enterprise_linux:8::baseos
    cpe:/a:redhat:enterprise_linux:8::appstream
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   Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:2.9.7-21.el8_10.1   < *
    cpe:/o:redhat:enterprise_linux:8::baseos
    cpe:/a:redhat:enterprise_linux:8::appstream
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   Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support Unaffected: 0:2.9.7-9.el8_2.3   < *
    cpe:/o:redhat:rhel_aus:8.2::baseos
    cpe:/a:redhat:rhel_aus:8.2::appstream
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   Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Unaffected: 0:2.9.7-9.el8_4.6   < *
    cpe:/a:redhat:rhel_aus:8.4::appstream
    cpe:/o:redhat:rhel_eus_long_life:8.4::baseos
    cpe:/o:redhat:rhel_aus:8.4::baseos
    cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
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   Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Unaffected: 0:2.9.7-9.el8_4.6   < *
    cpe:/a:redhat:rhel_aus:8.4::appstream
    cpe:/o:redhat:rhel_eus_long_life:8.4::baseos
    cpe:/o:redhat:rhel_aus:8.4::baseos
    cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
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   Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Unaffected: 0:2.9.7-13.el8_6.10   < *
    cpe:/a:redhat:rhel_e4s:8.6::appstream
    cpe:/o:redhat:rhel_e4s:8.6::baseos
    cpe:/o:redhat:rhel_tus:8.6::baseos
    cpe:/a:redhat:rhel_tus:8.6::appstream
    cpe:/o:redhat:rhel_aus:8.6::baseos
    cpe:/a:redhat:rhel_aus:8.6::appstream
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   Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service Unaffected: 0:2.9.7-13.el8_6.10   < *
    cpe:/a:redhat:rhel_e4s:8.6::appstream
    cpe:/o:redhat:rhel_e4s:8.6::baseos
    cpe:/o:redhat:rhel_tus:8.6::baseos
    cpe:/a:redhat:rhel_tus:8.6::appstream
    cpe:/o:redhat:rhel_aus:8.6::baseos
    cpe:/a:redhat:rhel_aus:8.6::appstream
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   Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions Unaffected: 0:2.9.7-13.el8_6.10   < *
    cpe:/a:redhat:rhel_e4s:8.6::appstream
    cpe:/o:redhat:rhel_e4s:8.6::baseos
    cpe:/o:redhat:rhel_tus:8.6::baseos
    cpe:/a:redhat:rhel_tus:8.6::appstream
    cpe:/o:redhat:rhel_aus:8.6::baseos
    cpe:/a:redhat:rhel_aus:8.6::appstream
Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service Unaffected: 0:2.9.7-16.el8_8.9   < *
    cpe:/o:redhat:rhel_e4s:8.8::baseos
    cpe:/o:redhat:rhel_tus:8.8::baseos
    cpe:/a:redhat:rhel_tus:8.8::appstream
    cpe:/a:redhat:rhel_e4s:8.8::appstream
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   Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Unaffected: 0:2.9.7-16.el8_8.9   < *
    cpe:/o:redhat:rhel_e4s:8.8::baseos
    cpe:/o:redhat:rhel_tus:8.8::baseos
    cpe:/a:redhat:rhel_tus:8.8::appstream
    cpe:/a:redhat:rhel_e4s:8.8::appstream
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   Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:2.9.13-10.el9_6   < *
    cpe:/a:redhat:enterprise_linux:9::appstream
    cpe:/o:redhat:enterprise_linux:9::baseos
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   Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:2.9.13-10.el9_6   < *
    cpe:/a:redhat:enterprise_linux:9::appstream
    cpe:/o:redhat:enterprise_linux:9::baseos
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   Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Unaffected: 0:2.9.13-1.el9_0.5   < *
    cpe:/o:redhat:rhel_e4s:9.0::baseos
    cpe:/a:redhat:rhel_e4s:9.0::appstream
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   Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Unaffected: 0:2.9.13-3.el9_2.7   < *
    cpe:/o:redhat:rhel_e4s:9.2::baseos
    cpe:/a:redhat:rhel_e4s:9.2::appstream
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   Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support Unaffected: 0:2.9.13-10.el9_4   < *
    cpe:/o:redhat:rhel_eus:9.4::baseos
    cpe:/a:redhat:rhel_eus:9.4::appstream
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   Red Hat Red Hat JBoss Core Services 2.4.62.SP2     cpe:/a:redhat:jboss_core_services:1
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   Red Hat Red Hat OpenShift Container Platform 4.12     cpe:/a:redhat:openshift:4.12::el8
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   Red Hat Red Hat OpenShift Container Platform 4.13     cpe:/a:redhat:openshift:4.13::el9
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   Red Hat Red Hat OpenShift Container Platform 4.14 Unaffected: 414.92.202508041909-0   < *
    cpe:/a:redhat:openshift:4.14::el9
    cpe:/a:redhat:openshift:4.14::el8
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   Red Hat Red Hat OpenShift Container Platform 4.15     cpe:/a:redhat:openshift:4.15::el9
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   Red Hat Red Hat OpenShift Container Platform 4.16 Unaffected: 416.94.202508050040-0   < *
    cpe:/a:redhat:openshift:4.16::el9
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   Red Hat Red Hat OpenShift Container Platform 4.17     cpe:/a:redhat:openshift:4.17::el9
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   Red Hat Red Hat OpenShift Container Platform 4.18 Unaffected: 418.94.202508060022-0   < *
    cpe:/a:redhat:openshift:4.18::el9
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   Red Hat Red Hat Discovery 2 Unaffected: sha256:ad07f55ee75fb20310c88f154a04665bd8465d138d66c665c300f61447858344   < *
    cpe:/a:redhat:discovery:2::el9
Create a notification for this product.
   Red Hat Red Hat Insights proxy 1.5 Unaffected: sha256:e54a5a5f9d69dd6a03e2bcd845e2202910a188d266d4a79b12c387ceffc36f2d   < *
    cpe:/a:redhat:insights_proxy:1.5::el9
Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
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Show details on NVD website


{
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      {
        "metrics": [
          {
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                "id": "CVE-2025-6021",
                "options": [
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                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-09-03T14:41:19.578427Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-09-03T14:46:43.637Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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              "issue-tracking"
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          }
        ],
        "title": "CISA ADP Vulnrichment"
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            "cpe:/a:redhat:enterprise_linux:8::appstream"
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          "packageName": "libxml2",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:2.9.7-21.el8_10.1",
              "versionType": "rpm"
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          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:8::baseos",
            "cpe:/a:redhat:enterprise_linux:8::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "libxml2",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:2.9.7-21.el8_10.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:rhel_aus:8.2::baseos",
            "cpe:/a:redhat:rhel_aus:8.2::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "libxml2",
          "product": "Red Hat Enterprise Linux 8.2 Advanced Update Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:2.9.7-9.el8_2.3",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_aus:8.4::appstream",
            "cpe:/o:redhat:rhel_eus_long_life:8.4::baseos",
            "cpe:/o:redhat:rhel_aus:8.4::baseos",
            "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "libxml2",
          "product": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:2.9.7-9.el8_4.6",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_aus:8.4::appstream",
            "cpe:/o:redhat:rhel_eus_long_life:8.4::baseos",
            "cpe:/o:redhat:rhel_aus:8.4::baseos",
            "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "libxml2",
          "product": "Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:2.9.7-9.el8_4.6",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:8.6::appstream",
            "cpe:/o:redhat:rhel_e4s:8.6::baseos",
            "cpe:/o:redhat:rhel_tus:8.6::baseos",
            "cpe:/a:redhat:rhel_tus:8.6::appstream",
            "cpe:/o:redhat:rhel_aus:8.6::baseos",
            "cpe:/a:redhat:rhel_aus:8.6::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "libxml2",
          "product": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:2.9.7-13.el8_6.10",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:8.6::appstream",
            "cpe:/o:redhat:rhel_e4s:8.6::baseos",
            "cpe:/o:redhat:rhel_tus:8.6::baseos",
            "cpe:/a:redhat:rhel_tus:8.6::appstream",
            "cpe:/o:redhat:rhel_aus:8.6::baseos",
            "cpe:/a:redhat:rhel_aus:8.6::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "libxml2",
          "product": "Red Hat Enterprise Linux 8.6 Telecommunications Update Service",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:2.9.7-13.el8_6.10",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:8.6::appstream",
            "cpe:/o:redhat:rhel_e4s:8.6::baseos",
            "cpe:/o:redhat:rhel_tus:8.6::baseos",
            "cpe:/a:redhat:rhel_tus:8.6::appstream",
            "cpe:/o:redhat:rhel_aus:8.6::baseos",
            "cpe:/a:redhat:rhel_aus:8.6::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "libxml2",
          "product": "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:2.9.7-13.el8_6.10",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:rhel_e4s:8.8::baseos",
            "cpe:/o:redhat:rhel_tus:8.8::baseos",
            "cpe:/a:redhat:rhel_tus:8.8::appstream",
            "cpe:/a:redhat:rhel_e4s:8.8::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "libxml2",
          "product": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:2.9.7-16.el8_8.9",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:rhel_e4s:8.8::baseos",
            "cpe:/o:redhat:rhel_tus:8.8::baseos",
            "cpe:/a:redhat:rhel_tus:8.8::appstream",
            "cpe:/a:redhat:rhel_e4s:8.8::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "libxml2",
          "product": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:2.9.7-16.el8_8.9",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:9::appstream",
            "cpe:/o:redhat:enterprise_linux:9::baseos"
          ],
          "defaultStatus": "affected",
          "packageName": "libxml2",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:2.9.13-10.el9_6",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:9::appstream",
            "cpe:/o:redhat:enterprise_linux:9::baseos"
          ],
          "defaultStatus": "affected",
          "packageName": "libxml2",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:2.9.13-10.el9_6",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:rhel_e4s:9.0::baseos",
            "cpe:/a:redhat:rhel_e4s:9.0::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "libxml2",
          "product": "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:2.9.13-1.el9_0.5",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:rhel_e4s:9.2::baseos",
            "cpe:/a:redhat:rhel_e4s:9.2::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "libxml2",
          "product": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:2.9.13-3.el9_2.7",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:rhel_eus:9.4::baseos",
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{\"url\": \"https://access.redhat.com/errata/RHSA-2025:19020\", \"name\": \"RHSA-2025:19020\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/security/cve/CVE-2025-6021\", \"tags\": [\"vdb-entry\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=2372406\", \"name\": \"RHBZ#2372406\", \"tags\": [\"issue-tracking\", \"x_refsource_REDHAT\"]}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"Mitigation for this issue is either not available or the currently available options don\u0027t meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability. Users are strongly advised to apply vendor-supplied patches as soon as they become available to address the underlying integer overflow flaw in the affected code.\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A flaw was found in libxml2\u0027s xmlBuildQName function, where integer overflows in buffer size calculations can lead to a stack-based buffer overflow. This issue can result in memory corruption or a denial of service when processing crafted input.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-121\", \"description\": \"Stack-based Buffer Overflow\"}]}], \"providerMetadata\": {\"orgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"shortName\": \"redhat\", \"dateUpdated\": \"2025-10-27T17:47:11.343Z\"}, \"x_redhatCweChain\": \"(CWE-190|CWE-121): Integer Overflow or Wraparound or Stack-based Buffer Overflow\"}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-6021\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-27T17:47:11.343Z\", \"dateReserved\": \"2025-06-12T05:52:54.211Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2025-06-12T12:49:16.157Z\", \"assignerShortName\": \"redhat\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


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