CVE-2026-103963

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-103963", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2026-10-01T15:30:36.833Z", "datePublished": "2026-10-30T04:08:40.002Z", "dateUpdated": "2026-11-12T23:00:26.837Z"}, "containers": {"cna": {"title": "Glib-networking: unbounded tls 1.3 session ticket queue growth in glib-networking allows remote denial of service", "metrics": [{"other": {"content": {"value": "Important", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"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"}, "format": "CVSS"}], "descriptions": [{"lang": "en", "value": "A flaw was found in glib-networking. When establishing connections using Transport Layer Security (TLS) version 1.3, the client-side session cache does not limit the number of session tickets retained for a single host. A malicious server can exploit this by sending excessive session ticket messages, causing the client application to continuously consume memory. This unbounded memory growth can exhaust system memory, resulting in a Denial of Service (DoS)."}], "affected": [{"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "glib-networking", "defaultStatus": "affected", "versions": [{"version": "0:2.80.0-3.el10_3.4", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/o:redhat:enterprise_linux:10.3"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10.2 Extended Update Support", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "glib-networking", "defaultStatus": "affected", "versions": [{"version": "0:2.80.0-3.el10_2.4", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/o:redhat:enterprise_linux_eus:10.2"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "glib-networking", "defaultStatus": "affected", "versions": [{"version": "0:2.68.3-3.el9_9.1", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:enterprise_linux:9::appstream", "cpe:/o:redhat:enterprise_linux:9::baseos"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "glib-networking", "defaultStatus": "affected", "versions": [{"version": "0:2.68.3-3.el9_9.1", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:enterprise_linux:9::appstream", "cpe:/o:redhat:enterprise_linux:9::baseos"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9.8 Extended Update Support", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "glib-networking", "defaultStatus": "affected", "versions": [{"version": "0:2.68.3-3.el9_8.1", "lessThan": "*", "versionType": "rpm", "status": "unaffected"}], "cpes": ["cpe:/a:redhat:rhel_eus:9.8::appstream", "cpe:/o:redhat:rhel_eus:9.8::baseos"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 6", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "glib-networking", "defaultStatus": "unaffected", "cpes": ["cpe:/o:redhat:rhel_els:6"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 7", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "glib-networking", "defaultStatus": "unaffected", "cpes": ["cpe:/o:redhat:rhel_els:7"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "glib-networking", "defaultStatus": "unaffected", "cpes": ["cpe:/a:redhat:enterprise_linux:8"]}], "references": [{"url": "https://access.redhat.com/errata/RHSA-2026:99695", "name": "RHSA-2026:99695", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:99696", "name": "RHSA-2026:99696", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:99697", "name": "RHSA-2026:99697", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/errata/RHSA-2026:99698", "name": "RHSA-2026:99698", "tags": ["vendor-advisory", "x_refsource_REDHAT"]}, {"url": "https://access.redhat.com/security/cve/CVE-2026-103963", "tags": ["vdb-entry", "x_refsource_REDHAT"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2465656", "name": "RHBZ#2465656", "tags": ["issue-tracking", "x_refsource_REDHAT"]}, {"url": "https://gitlab.gnome.org/GNOME/glib-networking/-/merge_requests/288"}], "datePublic": "2026-10-29T08:06:30.133Z", "problemTypes": [{"descriptions": [{"cweId": "CWE-400", "description": "Uncontrolled Resource Consumption", "lang": "en", "type": "CWE"}]}], "x_redhatCweChain": "CWE-400: Uncontrolled Resource Consumption", "workarounds": [{"lang": "en", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}], "timeline": [{"lang": "en", "time": "2026-05-04T15:57:54.000Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-10-29T08:06:30.133Z", "value": "Made public."}], "credits": [{"lang": "en", "value": "This issue was discovered by Found by AISLE in partnership with Red Hat."}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-11-12T23:00:26.837Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-11-04T02:03:18.185158Z", "id": "CVE-2026-103963", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-04T02:03:26.304Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-103963", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-04T02:03:18.185158Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-04T02:03:22.559Z"}}], "cna": {"title": "Glib-networking: unbounded tls 1.3 session ticket queue growth in glib-networking allows remote denial of service", "credits": [{"lang": "en", "value": "This issue was discovered by Found by AISLE in partnership with Red Hat."}], "metrics": [{"other": {"type": "Red Hat severity rating", "content": {"value": "Important", "namespace": "https://access.redhat.com/security/updates/classification/"}}}, {"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}], "affected": [{"cpes": ["cpe:/a:redhat:enterprise_linux:10"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "packageName": "glib-networking", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/o:redhat:rhel_els:6"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 6", "packageName": "glib-networking", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/o:redhat:rhel_els:7"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 7", "packageName": "glib-networking", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/a:redhat:enterprise_linux:8"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "packageName": "glib-networking", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/a:redhat:enterprise_linux:9"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "packageName": "glib-networking", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}], "timeline": [{"lang": "en", "time": "2026-05-04T15:57:54.000Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-10-29T08:06:30.133Z", "value": "Made public."}], "datePublic": "2026-10-29T08:06:30.133Z", "references": [{"url": "https://access.redhat.com/security/cve/CVE-2026-103963", "tags": ["vdb-entry", "x_refsource_REDHAT"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2465656", "name": "RHBZ#2465656", "tags": ["issue-tracking", "x_refsource_REDHAT"]}, {"url": "https://gitlab.gnome.org/GNOME/glib-networking/-/merge_requests/288"}], "workarounds": [{"lang": "en", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}], "x_generator": {"engine": "cvelib 1.8.0"}, "descriptions": [{"lang": "en", "value": "A flaw was found in glib-networking. When establishing connections using Transport Layer Security (TLS) version 1.3, the client-side session cache does not limit the number of session tickets retained for a single host. A malicious server can exploit this by sending excessive session ticket messages, causing the client application to continuously consume memory. This unbounded memory growth can exhaust system memory, resulting in a Denial of Service (DoS)."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-400", "description": "Uncontrolled Resource Consumption"}]}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-11-04T21:40:58.175Z"}, "x_redhatCweChain": "CWE-400: Uncontrolled Resource Consumption"}}, "cveMetadata": {"cveId": "CVE-2026-103963", "state": "PUBLISHED", "dateUpdated": "2026-11-04T21:40:58.175Z", "dateReserved": "2026-10-01T15:30:36.833Z", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "datePublished": "2026-10-30T04:08:40.002Z", "assignerShortName": "redhat"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:10.3"], "defaultStatus": "affected", "packageName": "glib-networking", "product": "Red Hat Enterprise Linux 10", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "0:2.80.0-3.el10_3.4", "versionType": "rpm"}]}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux_eus:10.2"], "defaultStatus": "affected", "packageName": "glib-networking", "product": "Red Hat Enterprise Linux 10.2 Extended Update Support", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "0:2.80.0-3.el10_2.4", "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": "glib-networking", "product": "Red Hat Enterprise Linux 9", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "0:2.68.3-3.el9_9.1", "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": "glib-networking", "product": "Red Hat Enterprise Linux 9", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "0:2.68.3-3.el9_9.1", "versionType": "rpm"}]}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:rhel_eus:9.8::appstream", "cpe:/o:redhat:rhel_eus:9.8::baseos"], "defaultStatus": "affected", "packageName": "glib-networking", "product": "Red Hat Enterprise Linux 9.8 Extended Update Support", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "0:2.68.3-3.el9_8.1", "versionType": "rpm"}]}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:rhel_els:6"], "defaultStatus": "unaffected", "packageName": "glib-networking", "product": "Red Hat Enterprise Linux 6", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:rhel_els:7"], "defaultStatus": "unaffected", "packageName": "glib-networking", "product": "Red Hat Enterprise Linux 7", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:enterprise_linux:8"], "defaultStatus": "unaffected", "packageName": "glib-networking", "product": "Red Hat Enterprise Linux 8", "vendor": "Red Hat"}], "source": "secalert@redhat.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw was found in glib-networking. When establishing connections using Transport Layer Security (TLS) version 1.3, the client-side session cache does not limit the number of session tickets retained for a single host. A malicious server can exploit this by sending excessive session ticket messages, causing the client application to continuously consume memory. This unbounded memory growth can exhaust system memory, resulting in a Denial of Service (DoS)."}], "id": "CVE-2026-103963", "lastModified": "2026-11-13T00:20:06.320", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-103963", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-04T02:03:18.185158Z", "version": "2.0.3"}}]}, "published": "2026-10-30T05:16:57.237", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:99695"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:99696"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:99697"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:99698"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2026-103963"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2465656"}, {"source": "secalert@redhat.com", "url": "https://gitlab.gnome.org/GNOME/glib-networking/-/merge_requests/288"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "This issue was discovered by Found by AISLE in partnership with Red Hat.", "bugzilla": {"description": "glib-networking: Unbounded TLS 1.3 session ticket queue growth in glib-networking allows remote denial of service", "id": "2465656", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2465656"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-400", "details": ["A flaw was found in glib-networking. When establishing connections using Transport Layer Security (TLS) version 1.3, the client-side session cache does not limit the number of session tickets retained for a single host. A malicious server can exploit this by sending excessive session ticket messages, causing the client application to continuously consume memory. This unbounded memory growth can exhaust system memory, resulting in a Denial of Service (DoS)."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-103963", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "glib-networking", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "glib-networking", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "glib-networking", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "glib-networking", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "glib-networking", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-10-29T08:06:30Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-103963\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-103963\nhttps://gitlab.gnome.org/GNOME/glib-networking/-/merge_requests/288"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Red Hat Enterprise Linux 10", "source": "cna", "vendor": "Red Hat"}, "product": "enterprise_linux", "vendor": "red_hat"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Red Hat Enterprise Linux 6", "source": "cna", "vendor": "Red Hat"}, "product": "enterprise_linux", "vendor": "red_hat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Red Hat Enterprise Linux 10", "source": "cna", "vendor": "Red Hat"}, "product": "enterprise_linux", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Red Hat Enterprise Linux 6", "source": "cna", "vendor": "Red Hat"}, "product": "enterprise_linux", "vendor": "redhat"}], "created": "2026-10-30T06:30:09.656299+00:00", "updated": "2026-10-30T08:00:13.841487+00:00", "vendors": ["red_hat", "red_hat$PRODUCT$enterprise_linux", "redhat", "redhat$PRODUCT$enterprise_linux"]}