{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-21745", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-29T08:45:45.757Z", "datePublished": "2025-02-27T02:12:17.853Z", "dateUpdated": "2025-03-24T15:39:43.365Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-03-24T15:39:43.365Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-cgroup: Fix class @block_class's subsystem refcount leakage\n\nblkcg_fill_root_iostats() iterates over @block_class's devices by\nclass_dev_iter_(init|next)(), but does not end iterating with\nclass_dev_iter_exit(), so causes the class's subsystem refcount leakage.\n\nFix by ending the iterating with class_dev_iter_exit()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["block/blk-cgroup.c"], "versions": [{"version": "ef45fe470e1e5410db4af87abc5d5055427945ac", "lessThan": "ffb494f1e7a047bd7a41b13796fcfb08fe5beafb", "status": "affected", "versionType": "git"}, {"version": "ef45fe470e1e5410db4af87abc5d5055427945ac", "lessThan": "38287f779b34dfe959b4b681e909f2d3d52b88be", "status": "affected", "versionType": "git"}, {"version": "ef45fe470e1e5410db4af87abc5d5055427945ac", "lessThan": "431b6ef2714be4d5babb802114987541a88b43b0", "status": "affected", "versionType": "git"}, {"version": "ef45fe470e1e5410db4af87abc5d5055427945ac", "lessThan": "993121481b5a87829f1e8163f47158b72679f309", "status": "affected", "versionType": "git"}, {"version": "ef45fe470e1e5410db4af87abc5d5055427945ac", "lessThan": "2ce09aabe009453d641a2ceb79e6461a2d4f3876", "status": "affected", "versionType": "git"}, {"version": "ef45fe470e1e5410db4af87abc5d5055427945ac", "lessThan": "67c7f213e052b1aa6caba4a7e25e303bc6997126", "status": "affected", "versionType": "git"}, {"version": "ef45fe470e1e5410db4af87abc5d5055427945ac", "lessThan": "d1248436cbef1f924c04255367ff4845ccd9025e", "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/blk-cgroup.c"], "versions": [{"version": "5.9", "status": "affected"}, {"version": "0", "lessThan": "5.9", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.235", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.179", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.129", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.78", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.14", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.13.3", "lessThanOrEqual": "6.13.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.14", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/ffb494f1e7a047bd7a41b13796fcfb08fe5beafb"}, {"url": "https://git.kernel.org/stable/c/38287f779b34dfe959b4b681e909f2d3d52b88be"}, {"url": "https://git.kernel.org/stable/c/431b6ef2714be4d5babb802114987541a88b43b0"}, {"url": "https://git.kernel.org/stable/c/993121481b5a87829f1e8163f47158b72679f309"}, {"url": "https://git.kernel.org/stable/c/2ce09aabe009453d641a2ceb79e6461a2d4f3876"}, {"url": "https://git.kernel.org/stable/c/67c7f213e052b1aa6caba4a7e25e303bc6997126"}, {"url": "https://git.kernel.org/stable/c/d1248436cbef1f924c04255367ff4845ccd9025e"}], "title": "blk-cgroup: Fix class @block_class's subsystem refcount leakage", "x_generator": {"engine": "bippy-5f407fcff5a0"}}}}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "09A1C435-31C4-419F-8294-CB3D2FF22404", "versionEndExcluding": "6.1.129", "versionStartIncluding": "5.9", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0C58261F-EDFB-4A12-8CCD-F12101482030", "versionEndExcluding": "6.6.78", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "033BB7EE-C9A2-45EA-BAC9-87BB9D951BCD", "versionEndExcluding": "6.12.14", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0E92CEE3-1FC3-4AFC-A513-DEDBA7414F00", "versionEndExcluding": "6.13.3", "versionStartIncluding": "6.13", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-cgroup: Fix class @block_class's subsystem refcount leakage\n\nblkcg_fill_root_iostats() iterates over @block_class's devices by\nclass_dev_iter_(init|next)(), but does not end iterating with\nclass_dev_iter_exit(), so causes the class's subsystem refcount leakage.\n\nFix by ending the iterating with class_dev_iter_exit()."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: blk-cgroup: Se corrige la p\u00e9rdida de recuento de referencias del subsistema de la clase @block_class blkcg_fill_root_iostats() itera sobre los dispositivos de @block_class mediante class_dev_iter_(init|next()), pero no finaliza la iteraci\u00f3n con class_dev_iter_exit(), por lo que provoca la p\u00e9rdida de recuento de referencias del subsistema de la clase. Se soluciona finalizando la iteraci\u00f3n con class_dev_iter_exit()."}], "id": "CVE-2025-21745", "lastModified": "2025-03-13T13:15:51.610", "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": "2025-02-27T03:15:15.137", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2ce09aabe009453d641a2ceb79e6461a2d4f3876"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/38287f779b34dfe959b4b681e909f2d3d52b88be"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/431b6ef2714be4d5babb802114987541a88b43b0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/67c7f213e052b1aa6caba4a7e25e303bc6997126"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/993121481b5a87829f1e8163f47158b72679f309"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d1248436cbef1f924c04255367ff4845ccd9025e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ffb494f1e7a047bd7a41b13796fcfb08fe5beafb"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-Other"}], "source": "nvd@nist.gov", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: blk-cgroup: Fix class @block_class's subsystem refcount leakage", "id": "2348654", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2348654"}, "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-401", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nblk-cgroup: Fix class @block_class's subsystem refcount leakage\nblkcg_fill_root_iostats() iterates over @block_class's devices by\nclass_dev_iter_(init|next)(), but does not end iterating with\nclass_dev_iter_exit(), so causes the class's subsystem refcount leakage.\nFix by ending the iterating with class_dev_iter_exit()."], "name": "CVE-2025-21745", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-02-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-21745\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-21745\nhttps://lore.kernel.org/linux-cve-announce/2025022600-CVE-2025-21745-19ee@gregkh/T"], "threat_severity": "Moderate"}