CVE-2025-21849

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Las funciones spin_lock/unlock() utilizadas en contextos de interrupci\u00f3n podr\u00edan provocar un interbloqueo, como se observ\u00f3 en el problema n.\u00b0 13399 de GitLab, que ocurre cuando la interrupci\u00f3n entra mientras se mantiene un bloqueo. Intente solucionar el problema guardando el estado de las irq antes de adquirir el bloqueo de giro. v2: a\u00f1adir llamadas de guardado/restauraci\u00f3n de estado de las irq a todos los bloqueos/desbloqueos en la ejecuci\u00f3n de signal_irq_work() (Maciej). v3: usar con spin_lock_irqsave() en guc_lrc_desc_unpin() en lugar de otras llamadas de bloqueo/desbloqueo y a\u00f1adir las etiquetas \"Fixes\" y \"Cc\" (Tvrtko); cambiar el t\u00edtulo y el mensaje de confirmaci\u00f3n (seleccionado del commit c088387ddd6482b40f21ccf23db1125e8fa4af7e)."}], "id": "CVE-2025-21849", "lastModified": "2026-06-17T08:44:26.300", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-21849", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-10-01T19:26:20.912921Z", "version": "2.0.3"}}]}, "published": "2025-03-12T10:15:17.367", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2bf1f4c129db7a10920655b000f0292f1ee509c2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/47ae46ac5407646420e06b78e0dad331e56a4bb4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e49477f7f78598295551d486ecc7f020d796432e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-667"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-667"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: drm/i915/gt: Use spin_lock_irqsave() in interruptible context", "id": "2351621", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2351621"}, "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-667", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/i915/gt: Use spin_lock_irqsave() in interruptible context\nspin_lock/unlock() functions used in interrupt contexts could\nresult in a deadlock, as seen in GitLab issue #13399,\nwhich occurs when interrupt comes in while holding a lock.\nTry to remedy the problem by saving irq state before spin lock\nacquisition.\nv2: add irqs' state save/restore calls to all locks/unlocks in\nsignal_irq_work() execution (Maciej)\nv3: use with spin_lock_irqsave() in guc_lrc_desc_unpin() instead\nof other lock/unlock calls and add Fixes and Cc tags (Tvrtko);\nchange title and commit message\n(cherry picked from commit c088387ddd6482b40f21ccf23db1125e8fa4af7e)"], "name": "CVE-2025-21849", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-03-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-21849\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-21849\nhttps://lore.kernel.org/linux-cve-announce/2025031212-CVE-2025-21849-c95e@gregkh/T"], "threat_severity": "Moderate"}

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