CVE-2022-49478

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pvr2_i2c_core_init\n\nSyzbot reported that -1 is used as array index. The problem was in\nmissing validation check.\n\nhdw->unit_number is initialized with -1 and then if init table walk fails\nthis value remains unchanged. Since code blindly uses this member for\narray indexing adding sanity check is the easiest fix for that.\n\nhdw->workpoll initialization moved upper to prevent warning in\n__flush_work."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: media: pvrusb2: arreglo array-index-out-of-bounds en pvr2_i2c_core_init Syzbot inform\u00f3 que se usa -1 como \u00edndice de matriz. El problema estaba en la falta de verificaci\u00f3n de validaci\u00f3n. hdw->unit_number se inicializa con -1 y luego, si falla el recorrido de tabla init, este valor permanece sin cambios. Dado que el c\u00f3digo usa ciegamente este miembro para la indexaci\u00f3n de matrices, agregar una verificaci\u00f3n de cordura es la soluci\u00f3n m\u00e1s f\u00e1cil para eso. La inicializaci\u00f3n de hdw->workpoll se movi\u00f3 hacia arriba para evitar la advertencia en __flush_work."}], "id": "CVE-2022-49478", "lastModified": "2026-06-17T05:18:10.720", "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"}, {"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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-49478", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-10-01T19:39:29.496371Z", "version": "2.0.3"}}]}, "published": "2025-02-26T07:01:24.050", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1310fc3538dcc375a2f46ef0a438512c2ca32827"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/24e807541e4a9263ed928e6ae3498de3ad43bd1e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2e004fe914b243db41fa96f9e583385f360ea58e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3309c2c574e13b21b44729f5bdbf21f60189b79a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4351bfe36aba9fa7dc9d68d498d25d41a0f45e67"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/471bec68457aaf981add77b4f590d65dd7da1059"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a3304766d9384886e6d3092c776273526947a2e9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a3660e06675bccec4bf149c7229ea1d491ba10d7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f99a8b1ec0eddc2931aeaa4f490277a15b39f511"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-129"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-129"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: media: pvrusb2: fix array-index-out-of-bounds in pvr2_i2c_core_init", "id": "2348228", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2348228"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-129", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmedia: pvrusb2: fix array-index-out-of-bounds in pvr2_i2c_core_init\nSyzbot reported that -1 is used as array index. The problem was in\nmissing validation check.\nhdw->unit_number is initialized with -1 and then if init table walk fails\nthis value remains unchanged. Since code blindly uses this member for\narray indexing adding sanity check is the easiest fix for that.\nhdw->workpoll initialization moved upper to prevent warning in\n__flush_work."], "name": "CVE-2022-49478", "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "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": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49478\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49478\nhttps://lore.kernel.org/linux-cve-announce/2025022604-CVE-2022-49478-4f2d@gregkh/T"], "threat_severity": "Moderate"}

{}