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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "7A70FD7B-2EDC-4C3B-ADE0-880AA759CDD7", "versionEndExcluding": "5.15.11", "versionStartIncluding": "5.15", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvduse: check that offset is within bounds in get_config()\n\nThis condition checks \"len\" but it does not check \"offset\" and that\ncould result in an out of bounds read if \"offset > dev->config_size\".\nThe problem is that since both variables are unsigned the\n\"dev->config_size - offset\" subtraction would result in a very high\nunsigned value.\n\nI think these checks might not be necessary because \"len\" and \"offset\"\nare supposed to already have been validated using the\nvhost_vdpa_config_validate() function. But I do not know the code\nperfectly, and I like to be safe."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: vduse: verifique que el desplazamiento est\u00e9 dentro de los l\u00edmites en get_config() Esta condici\u00f3n verifica \"len\" pero no verifica \"desplazamiento\" y eso podr\u00eda resultar en una lectura fuera de los l\u00edmites si \" desplazamiento > dev->config_size\". El problema es que, dado que ambas variables no est\u00e1n firmadas, la resta \"dev->config_size - offset\" dar\u00eda como resultado un valor sin firmar muy alto. Creo que estas comprobaciones podr\u00edan no ser necesarias porque se supone que \"len\" y \"offset\" ya se han validado mediante la funci\u00f3n vhost_vdpa_config_validate(). Pero no conozco el c\u00f3digo a la perfecci\u00f3n y me gusta estar seguro."}], "id": "CVE-2021-47604", "lastModified": "2024-11-21T06:36:39.020", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-06-19T15:15:54.973", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/dc1db0060c02d119fd4196924eff2d1129e9a442"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ebbbc5fea3f648175df1aa3f127c78eb0252cc2a"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/dc1db0060c02d119fd4196924eff2d1129e9a442"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ebbbc5fea3f648175df1aa3f127c78eb0252cc2a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: vduse: check that offset is within bounds in get_config()", "id": "2293222", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2293222"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nvduse: check that offset is within bounds in get_config()\nThis condition checks \"len\" but it does not check \"offset\" and that\ncould result in an out of bounds read if \"offset > dev->config_size\".\nThe problem is that since both variables are unsigned the\n\"dev->config_size - offset\" subtraction would result in a very high\nunsigned value.\nI think these checks might not be necessary because \"len\" and \"offset\"\nare supposed to already have been validated using the\nvhost_vdpa_config_validate() function. But I do not know the code\nperfectly, and I like to be safe."], "name": "CVE-2021-47604", "package_state": [{"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": "2024-06-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47604\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47604\nhttps://lore.kernel.org/linux-cve-announce/2024061923-CVE-2021-47604-e309@gregkh/T"], "threat_severity": "Low"}

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