CVE-2026-43007

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QAIC handles\nthis by calling decode_deactivate() to release the resources allocated for\nthat DBC. Since that handling is done in the qaic_manage_ioctl() context,\nif the user goes away before receiving and handling the deactivation, the\nhost will be out-of-sync with the DBCs available for use, and the DBC\nresources will not be freed unless the device is removed. If another user\nloads and requests to activate a network, then the device assigns the same\nDBC to that network, QAIC will \"indefinitely\" wait for dbc->in_use = false,\nleading the user process to hang.\n\nAs a solution to this, handle QAIC_TRANS_DEACTIVATE_FROM_DEV transactions\nthat are received after the user has gone away."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\naccel/qaic: Manejar la desactivaci\u00f3n de DBC si el propietario se fue\n\nCuando se libera un DBC, el dispositivo env\u00eda una transacci\u00f3n QAIC_TRANS_DEACTIVATE_FROM_DEV al host a trav\u00e9s del canal MHI QAIC_CONTROL. QAIC maneja esto llamando a decode_deactivate() para liberar los recursos asignados para ese DBC. Dado que ese manejo se realiza en el contexto de qaic_manage_ioctl(), si el usuario se va antes de recibir y manejar la desactivaci\u00f3n, el host estar\u00e1 desincronizado con los DBCs disponibles para su uso, y los recursos del DBC no se liberar\u00e1n a menos que se retire el dispositivo. Si otro usuario carga y solicita activar una red, entonces el dispositivo asigna el mismo DBC a esa red, QAIC esperar\u00e1 \u2019indefinidamente\u2019 a que dbc -> in_use = false, lo que har\u00e1 que el proceso de usuario se cuelgue.\n\nComo soluci\u00f3n a esto, manejar las transacciones QAIC_TRANS_DEACTIVATE_FROM_DEV que se reciben despu\u00e9s de que el usuario se ha ido."}], "id": "CVE-2026-43007", "lastModified": "2026-11-11T23:10:00.263", "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": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-05-01T15:16:44.553", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/08021f2d4a557d6491e3bcc288e96425f50aa3cf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2dd67966f39a2abf8ccb4865031c722e40e01b7f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2feec5ae5df785658924ab6bd91280dc3926507c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ee0180e77e6c8482644569632065411de844c515"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f403094d9075d7c565a3d81002b781c325cb3c07"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-415"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: accel/qaic: Handle DBC deactivation if the owner went away", "id": "2464407", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464407"}, "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-772", "details": ["A flaw was found in the accel/qaic component of the Linux kernel. When a user process terminates before the device's deactivation transaction for a Device-Bound Context (DBC) is fully processed, the host system can become out of sync with available DBCs. This can lead to a denial of service, where a subsequent user attempting to activate a network may experience their process hanging indefinitely if assigned the same DBC."], "name": "CVE-2026-43007", "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": "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": "2026-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43007\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43007\nhttps://lore.kernel.org/linux-cve-announce/2026050154-CVE-2026-43007-469f@gregkh/T"], "threat_severity": "Moderate"}

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