{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2022-49147", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T01:49:39.271Z", "datePublished": "2025-02-26T01:55:15.373Z", "dateUpdated": "2026-05-11T18:54:02.788Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T18:54:02.788Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: Fix the maximum minor value is blk_alloc_ext_minor()\n\nida_alloc_range(..., min, max, ...) returns values from min to max,\ninclusive.\n\nSo, NR_EXT_DEVT is a valid idx returned by blk_alloc_ext_minor().\n\nThis is an issue because in device_add_disk(), this value is used in:\n ddev->devt = MKDEV(disk->major, disk->first_minor);\nand NR_EXT_DEVT is '(1 << MINORBITS)'.\n\nSo, should 'disk->first_minor' be NR_EXT_DEVT, it would overflow."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["block/genhd.c"], "versions": [{"version": "22ae8ce8b89241c94ac00c237752c0ffa37ba5ae", "lessThan": "5b9ac3727e4abb11c9cfbe9c0781fc05dfdd7cfb", "status": "affected", "versionType": "git"}, {"version": "22ae8ce8b89241c94ac00c237752c0ffa37ba5ae", "lessThan": "0f8cf8f5ccbad25ed6828875b222dbab29d5c272", "status": "affected", "versionType": "git"}, {"version": "22ae8ce8b89241c94ac00c237752c0ffa37ba5ae", "lessThan": "fbe2cc4525480ddd20c866bb5c0578071e01451a", "status": "affected", "versionType": "git"}, {"version": "22ae8ce8b89241c94ac00c237752c0ffa37ba5ae", "lessThan": "d1868328dec5ae2cf210111025fcbc71f78dd5ca", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["block/genhd.c"], "versions": [{"version": "5.11", "status": "affected"}, {"version": "0", "lessThan": "5.11", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.33", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.16.19", "lessThanOrEqual": "5.16.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.17.2", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.18", "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": "5.11", "versionEndExcluding": "5.15.33"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "5.16.19"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "5.17.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "5.18"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/5b9ac3727e4abb11c9cfbe9c0781fc05dfdd7cfb"}, {"url": "https://git.kernel.org/stable/c/0f8cf8f5ccbad25ed6828875b222dbab29d5c272"}, {"url": "https://git.kernel.org/stable/c/fbe2cc4525480ddd20c866bb5c0578071e01451a"}, {"url": "https://git.kernel.org/stable/c/d1868328dec5ae2cf210111025fcbc71f78dd5ca"}], "title": "block: Fix the maximum minor value is blk_alloc_ext_minor()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "27C42AE8-B387-43E2-938A-E1C8B40BE6D5", "versionEndExcluding": "5.15.33", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "20C43679-0439-405A-B97F-685BEE50613B", "versionEndExcluding": "5.16.19", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "210C679C-CF84-44A3-8939-E629C87E54BF", "versionEndExcluding": "5.17.2", "versionStartIncluding": "5.17", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: Fix the maximum minor value is blk_alloc_ext_minor()\n\nida_alloc_range(..., min, max, ...) returns values from min to max,\ninclusive.\n\nSo, NR_EXT_DEVT is a valid idx returned by blk_alloc_ext_minor().\n\nThis is an issue because in device_add_disk(), this value is used in:\n ddev->devt = MKDEV(disk->major, disk->first_minor);\nand NR_EXT_DEVT is '(1 << MINORBITS)'.\n\nSo, should 'disk->first_minor' be NR_EXT_DEVT, it would overflow."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: block: Fix el valor menor m\u00e1ximo es blk_alloc_ext_minor() ida_alloc_range(..., min, max, ...) devuelve valores de min a max, ambos incluidos. Por lo tanto, NR_EXT_DEVT es un idx v\u00e1lido devuelto por blk_alloc_ext_minor(). Esto es un problema porque en device_add_disk(), este valor se usa en: ddev-&gt;devt = MKDEV(disk-&gt;major, disk-&gt;first_minor); y NR_EXT_DEVT es '(1 &lt;&lt; MINORBITS)'. Por lo tanto, si 'disk-&gt;first_minor' fuera NR_EXT_DEVT, se desbordar\u00eda."}], "id": "CVE-2022-49147", "lastModified": "2025-10-15T19:47:16.200", "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"}]}, "published": "2025-02-26T07:00:51.887", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0f8cf8f5ccbad25ed6828875b222dbab29d5c272"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5b9ac3727e4abb11c9cfbe9c0781fc05dfdd7cfb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d1868328dec5ae2cf210111025fcbc71f78dd5ca"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fbe2cc4525480ddd20c866bb5c0578071e01451a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2022:8267", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-162.6.1.el9_1", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2022-11-15T00:00:00Z"}, {"advisory": "RHSA-2022:8267", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-162.6.1.el9_1", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2022-11-15T00:00:00Z"}], "bugzilla": {"description": "kernel: block: Fix the maximum minor value is blk_alloc_ext_minor()", "id": "2348106", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2348106"}, "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": "verified"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nblock: Fix the maximum minor value is blk_alloc_ext_minor()\nida_alloc_range(..., min, max, ...) returns values from min to max,\ninclusive.\nSo, NR_EXT_DEVT is a valid idx returned by blk_alloc_ext_minor().\nThis is an issue because in device_add_disk(), this value is used in:\nddev->devt = MKDEV(disk->major, disk->first_minor);\nand NR_EXT_DEVT is '(1 << MINORBITS)'.\nSo, should 'disk->first_minor' be NR_EXT_DEVT, it would overflow."], "name": "CVE-2022-49147", "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": "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": "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-2022-49147\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49147\nhttps://lore.kernel.org/linux-cve-announce/2025022608-CVE-2022-49147-7f2f@gregkh/T"], "threat_severity": "Moderate"}

{}