CVE-2026-23466

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However, if driver load fails, this protection is\ninsufficient because drm_dev_unplug() is never called.\n\nAdditionally, devm release functions cannot guarantee that all BOs with\nGGTT mappings are destroyed before the GGTT MMIO region is removed, as\nsome BOs may be freed asynchronously by worker threads.\n\nTo address this, introduce an open-coded flag, protected by the GGTT\nlock, that guards GGTT MMIO access. The flag is cleared during the\ndev_fini_ggtt devm release function to ensure MMIO access is disabled\nonce teardown begins.\n\n(cherry picked from commit 4f3a998a173b4325c2efd90bdadc6ccd3ad9a431)"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable GGTT removal path is in the local Intel xe DRM driver teardown/probe-failure path, reached through local device/driver activity rather than network or adjacent input.\nAC:L - Once a probe-failure or teardown window exists with GGTT-mapped BO cleanup pending, the stale MMIO access follows from deterministic cleanup ordering; repeated local attempts can trigger the condition.\nPR:L - The path is local and tied to DRM/driver resources; although forcing probe failure may require stronger controls in some deployments, local DRM access and cleanup are involved, so Low is the higher defensible choice under the uncertainty rule.\nUI:N - No separate victim action is required after the local attacker triggers the driver/probe/cleanup sequence.\nS:U - The impact remains within the local kernel/driver security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - The bug is stale GGTT MMIO access after teardown, a use-after-unmap style memory corruption condition; under the required overestimation rule, such corruption is treated as potentially enabling broader kernel information disclosure.\nI:H - The vulnerable operation writes GGTT PTEs through a stale MMIO mapping after it may have been removed, so it can plausibly corrupt kernel or device state and is scored as high integrity impact.\nA:H - The observed failure mode is a kernel page fault/oops in `xe_ggtt_set_pte()` from `ggtt_node_remove_work_func()`, causing a kernel crash or severe availability loss."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/xe/xe_ggtt.c", "drivers/gpu/drm/xe/xe_ggtt_types.h"], "versions": [{"version": "919bb54e989c1edef87e9797be125c94c450fc65", "lessThan": "e2b424aadecb640f9e037b2891191cf8fd4c64cf", "status": "affected", "versionType": "git"}, {"version": "919bb54e989c1edef87e9797be125c94c450fc65", "lessThan": "1e9e2640d870d4837bcfdc220cb2c99ae5ee119f", "status": "affected", "versionType": "git"}, {"version": "919bb54e989c1edef87e9797be125c94c450fc65", "lessThan": "76326dc06d8793c2c81c31cc0115dbc348de2f88", "status": "affected", "versionType": "git"}, {"version": "919bb54e989c1edef87e9797be125c94c450fc65", "lessThan": "01f2557aa684e514005541e71a3d01f4cd45c170", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/xe/xe_ggtt.c", "drivers/gpu/drm/xe/xe_ggtt_types.h"], "versions": [{"version": "6.12", "status": "affected"}, {"version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.78", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.20", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.10", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.12.78"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.18.20"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.19.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e2b424aadecb640f9e037b2891191cf8fd4c64cf"}, {"url": "https://git.kernel.org/stable/c/1e9e2640d870d4837bcfdc220cb2c99ae5ee119f"}, {"url": "https://git.kernel.org/stable/c/76326dc06d8793c2c81c31cc0115dbc348de2f88"}, {"url": "https://git.kernel.org/stable/c/01f2557aa684e514005541e71a3d01f4cd45c170"}], "title": "drm/xe: Open-code GGTT MMIO access protection", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-23466", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:08:37.639058Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-362", "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T18:35:45.710Z"}}]}}

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However, if driver load fails, this protection is\ninsufficient because drm_dev_unplug() is never called.\n\nAdditionally, devm release functions cannot guarantee that all BOs with\nGGTT mappings are destroyed before the GGTT MMIO region is removed, as\nsome BOs may be freed asynchronously by worker threads.\n\nTo address this, introduce an open-coded flag, protected by the GGTT\nlock, that guards GGTT MMIO access. The flag is cleared during the\ndev_fini_ggtt devm release function to ensure MMIO access is disabled\nonce teardown begins.\n\n(cherry picked from commit 4f3a998a173b4325c2efd90bdadc6ccd3ad9a431)"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndrm/xe: Implementaci\u00f3n directa de la protecci\u00f3n de acceso MMIO de GGTT\n\nEl acceso MMIO de GGTT est\u00e1 actualmente protegido por hotplug (drm_dev_enter), lo que funciona correctamente cuando el controlador se carga con \u00e9xito y luego se desvincula o descarga. Sin embargo, si la carga del controlador falla, esta protecci\u00f3n es insuficiente porque drm_dev_unplug() nunca se llama.\n\nAdem\u00e1s, las funciones de liberaci\u00f3n de devm no pueden garantizar que todos los BOs con mapeos de GGTT sean destruidos antes de que se elimine la regi\u00f3n MMIO de GGTT, ya que algunos BOs pueden ser liberados asincr\u00f3nicamente por hilos de trabajo.\n\nPara abordar esto, se introduce un indicador de codificaci\u00f3n directa, protegido por el bloqueo de GGTT, que protege el acceso MMIO de GGTT. El indicador se borra durante la funci\u00f3n de liberaci\u00f3n de devm dev_fini_ggtt para asegurar que el acceso MMIO se deshabilite una vez que comienza el desmantelamiento.\n\n(seleccionado de la confirmaci\u00f3n 4f3a998a173b4325c2efd90bdadc6ccd3ad9a431)"}], "id": "CVE-2026-23466", "lastModified": "2026-10-19T19:17:50.500", "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": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-23466", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:08:37.639058Z", "version": "2.0.3"}}]}, "published": "2026-04-03T16:16:34.017", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/01f2557aa684e514005541e71a3d01f4cd45c170"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1e9e2640d870d4837bcfdc220cb2c99ae5ee119f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/76326dc06d8793c2c81c31cc0115dbc348de2f88"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e2b424aadecb640f9e037b2891191cf8fd4c64cf"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-362"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: drm/xe: Open-code GGTT MMIO access protection", "id": "2454867", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2454867"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-1220", "details": ["A flaw was found in the `drm/xe` component of the Linux kernel. This vulnerability involves insufficient protection of Graphics Translation Table (GGTT) Memory-Mapped I/O (MMIO) access. When the driver fails to load or during certain cleanup operations, the system's memory access protection is inadequate. This could allow a local attacker to potentially cause the system to become unstable or unresponsive, leading to a denial of service."], "name": "CVE-2026-23466", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-03T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-23466\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23466\nhttps://lore.kernel.org/linux-cve-announce/2026040321-CVE-2026-23466-ae2c@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[919bb54e989c1edef87e9797be125c94c450fc65,e2b424aadecb640f9e037b2891191cf8fd4c64cf)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[919bb54e989c1edef87e9797be125c94c450fc65,1e9e2640d870d4837bcfdc220cb2c99ae5ee119f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[919bb54e989c1edef87e9797be125c94c450fc65,76326dc06d8793c2c81c31cc0115dbc348de2f88)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[919bb54e989c1edef87e9797be125c94c450fc65,01f2557aa684e514005541e71a3d01f4cd45c170)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.12"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.78,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.20,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.10,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0-rc5,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-04-03T21:13:32.736591+00:00", "updated": "2026-10-19T21:45:04.259293+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}