CVE-2025-26599

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En ese caso, compRedirectWindow() devolver\u00e1 un error BadAlloc sin validar el \u00e1rbol de ventanas marcado justo antes, lo que deja los datos validados parcialmente inicializados y el uso de un puntero no inicializado m\u00e1s adelante."}], "id": "CVE-2025-26599", "lastModified": "2026-11-04T22:17:31.143", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "secalert@redhat.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-26599", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-02-25T16:22:35.562208Z", "version": "2.0.3"}}]}, "published": "2025-02-25T16:15:39.163", "references": [{"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2025:2500"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2025:2502"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2025:2861"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2025:2862"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2025:2865"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2025:2866"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2025:2873"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2025:2874"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2025:2875"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2025:2879"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2025:2880"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2025:3976"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2025:7163"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2025:7165"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2025:7458"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/security/cve/CVE-2025-26599"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2345253"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/02/msg00036.html"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-824"}], "source": "secalert@redhat.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-824"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2025:7458", "cpe": "cpe:/o:redhat:enterprise_linux:10.0", "package": "xorg-x11-server-Xwayland-0:24.1.5-3.el10_0", "product_name": "Red Hat Enterprise Linux 10", "release_date": "2025-05-13T00:00:00Z"}, {"advisory": "RHSA-2025:2861", "cpe": "cpe:/o:redhat:rhel_els:7", "package": "tigervnc-0:1.8.0-36.el7_9", "product_name": "Red Hat Enterprise Linux 7 Extended Lifecycle Support", "release_date": "2025-03-17T00:00:00Z"}, {"advisory": "RHSA-2025:2879", "cpe": "cpe:/o:redhat:rhel_els:7", "package": "xorg-x11-server-0:1.20.4-30.el7_9", "product_name": "Red Hat Enterprise Linux 7 Extended Lifecycle Support", "release_date": "2025-03-17T00:00:00Z"}, {"advisory": "RHSA-2025:2502", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "tigervnc-0:1.13.1-15.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2025-03-10T00:00:00Z"}, {"advisory": "RHSA-2025:2866", "cpe": "cpe:/a:redhat:rhel_aus:8.2", "package": "tigervnc-0:1.9.0-15.el8_2.13", "product_name": "Red Hat Enterprise Linux 8.2 Advanced Update Support", "release_date": "2025-03-17T00:00:00Z"}, {"advisory": "RHSA-2025:2865", "cpe": "cpe:/a:redhat:rhel_aus:8.4", "package": "tigervnc-0:1.11.0-8.el8_4.12", "product_name": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support", "release_date": "2025-03-17T00:00:00Z"}, {"advisory": "RHSA-2025:2865", "cpe": "cpe:/a:redhat:rhel_tus:8.4", "package": "tigervnc-0:1.11.0-8.el8_4.12", "product_name": "Red Hat Enterprise Linux 8.4 Telecommunications Update Service", "release_date": "2025-03-17T00:00:00Z"}, {"advisory": "RHSA-2025:2865", "cpe": "cpe:/a:redhat:rhel_e4s:8.4", "package": "tigervnc-0:1.11.0-8.el8_4.12", "product_name": "Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions", "release_date": "2025-03-17T00:00:00Z"}, {"advisory": "RHSA-2025:2880", "cpe": "cpe:/a:redhat:rhel_aus:8.6", "package": "tigervnc-0:1.12.0-6.el8_6.13", "product_name": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support", "release_date": "2025-03-17T00:00:00Z"}, {"advisory": "RHSA-2025:2880", "cpe": "cpe:/a:redhat:rhel_tus:8.6", "package": "tigervnc-0:1.12.0-6.el8_6.13", "product_name": "Red Hat Enterprise Linux 8.6 Telecommunications Update Service", "release_date": "2025-03-17T00:00:00Z"}, {"advisory": "RHSA-2025:2880", "cpe": "cpe:/a:redhat:rhel_e4s:8.6", "package": "tigervnc-0:1.12.0-6.el8_6.13", "product_name": "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions", "release_date": "2025-03-17T00:00:00Z"}, {"advisory": "RHSA-2025:2862", "cpe": "cpe:/a:redhat:rhel_eus:8.8", "package": "tigervnc-0:1.12.0-15.el8_8.12", "product_name": "Red Hat Enterprise Linux 8.8 Extended Update Support", "release_date": "2025-03-17T00:00:00Z"}, {"advisory": "RHSA-2025:2500", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "tigervnc-0:1.14.1-1.el9_5.1", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-03-10T00:00:00Z"}, {"advisory": "RHSA-2025:7163", "cpe": "cpe:/a:redhat:enterprise_linux:9", "impact": "moderate", "package": "xorg-x11-server-0:1.20.11-28.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}, {"advisory": "RHSA-2025:7165", "cpe": "cpe:/a:redhat:enterprise_linux:9", "impact": "moderate", "package": "xorg-x11-server-Xwayland-0:23.2.7-3.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}, {"advisory": "RHSA-2025:2873", "cpe": "cpe:/a:redhat:rhel_e4s:9.0", "package": "tigervnc-0:1.11.0-22.el9_0.13", "product_name": "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions", "release_date": "2025-03-17T00:00:00Z"}, {"advisory": "RHSA-2025:2874", "cpe": "cpe:/a:redhat:rhel_eus:9.2", "package": "tigervnc-0:1.12.0-14.el9_2.10", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2025-03-17T00:00:00Z"}, {"advisory": "RHSA-2025:2875", "cpe": "cpe:/a:redhat:rhel_eus:9.4", "package": "tigervnc-0:1.13.1-8.el9_4.5", "product_name": "Red Hat Enterprise Linux 9.4 Extended Update Support", "release_date": "2025-03-17T00:00:00Z"}], "bugzilla": {"description": "xorg: xwayland: Use of uninitialized pointer in compRedirectWindow()", "id": "2345253", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2345253"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-824", "details": ["An access to an uninitialized pointer flaw was found in X.Org and Xwayland. The function compCheckRedirect() may fail if it cannot allocate the backing pixmap. In that case, compRedirectWindow() will return a BadAlloc error without validating the window tree marked just before, which leaves the validated data partly initialized and the use of an uninitialized pointer later.", "An access to an uninitialized pointer flaw was found in X.Org and Xwayland. The function compCheckRedirect() may fail if it cannot allocate the backing pixmap. In that case, compRedirectWindow() will return a BadAlloc error without validating the window tree marked just before, which leaves the validated data partly initialized and the use of an uninitialized pointer later."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2025-26599", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Affected", "package_name": "tigervnc", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "xorg-x11-server", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "impact": "moderate", "package_name": "xorg-x11-server", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "impact": "moderate", "package_name": "xorg-x11-server-Xwayland", "product_name": "Red Hat Enterprise Linux 8"}], "public_date": "2025-02-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-26599\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-26599"], "statement": "Xorg server does not run with root privileges in Red Hat Enterprise Linux 8 and 9, therefore, Red Hat Enterprise Linux 8 and 9 have been rated with a Moderate severity and are not affected by this bug.", "threat_severity": "Important"}

{"analysis": {"en": {"generated_at": "2026-04-28T03:36:20.386977+00:00", "value": {"mitigation_remediation": ["Apply the Red\u00a0Hat errata packages RHSA\u20112025:2500, RHSA\u20112025:2502, RHSA\u20112025:2861, RHSA\u20112025:2862, RHSA\u20112025:2865, RHSA\u20112025:2866, RHSA\u20112025:2873, RHSA\u20112025:2874, RHSA\u20112025:2875, RHSA\u20112025:2879, RHSA\u20112025:2880, RHSA\u20112025:3976, RHSA\u20112025:7163, RHSA\u20112025:7165, and RHSA\u20112025:7458 to update Xorg and Xwayland to the patched releases.", "If you use a non\u2011Red\u00a0Hat distribution, upgrade the Xorg server and Xwayland packages to the latest releases that include the upstream fix.", "After installing the updated packages, restart the display server or reboot the system to ensure the new binaries are in use."], "summary": {"action": "Patch immediately", "impact": "Memory corruption that may lead to denial of service or code execution"}, "threat_synthesis": {"affected_systems": "The vulnerability affects multiple Red\u00a0Hat Enterprise Linux releases, including RHEL\u202f6,\u202f7,\u202f8,\u202f8.2,\u202f8.4,\u202f8.6,\u202f8.8,\u202f9,\u202f9.0,\u202f9.2,\u202f9.4, and\u202f10, together with their extended update and support branches. It also impacts packages that bundle the Xorg server, Xwayland, and TigerVNC drivers that incorporate Xwayland code. Non\u2011Red\u00a0Hat distributions that employ these components are similarly at risk if the Xorg/Xwayland packages remain unpatched.", "description_and_impact": "An access to an uninitialized pointer flaw was found in the compredirectwindow() routine of X.Org and Xwayland. When a backing pixmap cannot be allocated, compCheckRedirect() may return a BadAlloc error without completing earlier validation of the window tree. This leaves partially initialized data that is used later, resulting in unpredictable memory corruption that can potentially allow an attacker to crash the display server or execute arbitrary code, depending on how the corrupted data is leveraged.", "risk_and_exploitability": "The CVSS score of 7.8 indicates a high severity, while the EPSS score of less than 1% suggests a low likelihood of current exploitation. The vulnerability is not listed in the CISA KEV catalog, and no public exploits are known. The most likely attack vector is local, since Xorg and Xwayland run in user space on the host. An attacker who can cause the allocation failure\u2014such as by crafting a special window\u2014might trigger a crash or potentially gain code execution, but reliable exploitation would require local access or compromise of the display server. Consequently, the risk is moderate, but the vulnerability should be remediated promptly."}}}}, "created": "2026-04-28T03:45:20.280850+00:00", "updated": "2026-04-28T03:45:20.280867+00:00", "vendors": []}