CVE-2023-52668

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ADVERTENCIA: se detect\u00f3 posible dependencia de bloqueo circular 6.7.0-rc5+ #1 No contaminado ---------------------------------- -------------------- kworker/u5:5/793427 est\u00e1 intentando adquirir el bloqueo: ffff88813256d028 (&cache->lock){+.+.}-{2: 2}, en: btrfs_zone_finish_one_bg+0x5e/0x130 pero la tarea ya mantiene el bloqueo: ffff88810a23a318 (&fs_info->zone_active_bgs_lock){+.+.}-{2:2}, en: btrfs_zone_finish_one_bg+0x34/0x130 cuyo bloqueo ya depende del cerradura nueva. la cadena de dependencia existente (en orden inverso) es: -> #1 (&fs_info->zone_active_bgs_lock){+.+.}-{2:2}: ... -> #0 (&cache->lock){+. +.}-{2:2}: ... Esto se debe a que tomamos fs_info->zone_active_bgs_lock despu\u00e9s del bloqueo de un block_group en btrfs_zone_activate() mientras hacemos lo contrario en otros lugares. Solucione el problema expandiendo la secci\u00f3n cr\u00edtica de fs_info->zone_active_bgs_lock y llev\u00e1ndola antes del bloqueo de block_group."}], "id": "CVE-2023-52668", "lastModified": "2026-06-17T06:43:17.770", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-52668", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-05-17T17:16:18.284069Z", "version": "2.0.3"}}]}, "published": "2024-05-17T14:15:09.640", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1908e9d01e5395adff68d9d308a0fb15337e6272"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6f74989f5909cdec9b1274641f0fa306b15bb476"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b18f3b60b35a8c01c9a2a0f0d6424c6d73971dc3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1908e9d01e5395adff68d9d308a0fb15337e6272"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6f74989f5909cdec9b1274641f0fa306b15bb476"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b18f3b60b35a8c01c9a2a0f0d6424c6d73971dc3"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-667"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: btrfs: zoned: fix lock ordering in btrfs_zone_activate()", "id": "2281348", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2281348"}, "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-667", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbtrfs: zoned: fix lock ordering in btrfs_zone_activate()\nThe btrfs CI reported a lockdep warning as follows by running generic\ngeneric/129.\nWARNING: possible circular locking dependency detected\n6.7.0-rc5+ #1 Not tainted\n------------------------------------------------------\nkworker/u5:5/793427 is trying to acquire lock:\nffff88813256d028 (&cache->lock){+.+.}-{2:2}, at: btrfs_zone_finish_one_bg+0x5e/0x130\nbut task is already holding lock:\nffff88810a23a318 (&fs_info->zone_active_bgs_lock){+.+.}-{2:2}, at: btrfs_zone_finish_one_bg+0x34/0x130\nwhich lock already depends on the new lock.\nthe existing dependency chain (in reverse order) is:\n-> #1 (&fs_info->zone_active_bgs_lock){+.+.}-{2:2}:\n...\n-> #0 (&cache->lock){+.+.}-{2:2}:\n...\nThis is because we take fs_info->zone_active_bgs_lock after a block_group's\nlock in btrfs_zone_activate() while doing the opposite in other places.\nFix the issue by expanding the fs_info->zone_active_bgs_lock's critical\nsection and taking it before a block_group's lock.", "A flaw was found in the Linux kernel\u2019s\u00a0btrfs module. Improper lock ordering can cause a circular locking dependency, resulting in a denial of service."], "name": "CVE-2023-52668", "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": "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": "2024-05-17T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-52668\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-52668\nhttps://lore.kernel.org/linux-cve-announce/2024051728-CVE-2023-52668-4da2@gregkh/T"], "statement": "The btrfs module is not built in the kernel shipped in Red Hat Enterprise Linux 8 and 9, so it is not affected by this vulnerability.", "threat_severity": "Moderate"}

{"created": "2025-07-12T22:44:57.742050+00:00", "updated": "2025-07-12T22:44:57.742124+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}