CVE-2022-50086

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In that case, there will be two iocs enabled\nand running on one disk. They own different iocgs on their active list. In\nthe ioc_timer_fn function, because of the iocgs from two iocs have the\nsame root iocg, the root iocg's walk_list may be overwritten by each other\nand this leads to list add/del corruptions in building or destroying the\ninner_walk list.\n\nAnd so far, the blk-rq-qos framework works in case that one instance for\none type rq_qos per queue by default. This patch make this explicit and\nalso fix the crash above."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["block/blk-iocost.c", "block/blk-iolatency.c", "block/blk-rq-qos.h", "block/blk-wbt.c"], "versions": [{"version": "a79050434b45959f397042080fd1d70ffa9bd9df", "lessThan": "0b7f5d7a4d2a72ad9de04ab8ccba2a31904aa638", "status": "affected", "versionType": "git"}, {"version": "a79050434b45959f397042080fd1d70ffa9bd9df", "lessThan": "08ef66e800a85afc6b54cb95841f6502627eee2e", "status": "affected", "versionType": "git"}, {"version": "a79050434b45959f397042080fd1d70ffa9bd9df", "lessThan": "0c9bb1acd1d103a3070b2126870eb52761d606ce", "status": "affected", "versionType": "git"}, {"version": "a79050434b45959f397042080fd1d70ffa9bd9df", "lessThan": "14a6e2eb7df5c7897c15b109cba29ab0c4a791b6", "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-iocost.c", "block/blk-iolatency.c", "block/blk-rq-qos.h", "block/blk-wbt.c"], "versions": [{"version": "4.19", "status": "affected"}, {"version": "0", "lessThan": "4.19", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.61", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.18.18", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19.2", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0", "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": "4.19", "versionEndExcluding": "5.15.61"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "5.18.18"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "5.19.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0b7f5d7a4d2a72ad9de04ab8ccba2a31904aa638"}, {"url": "https://git.kernel.org/stable/c/08ef66e800a85afc6b54cb95841f6502627eee2e"}, {"url": "https://git.kernel.org/stable/c/0c9bb1acd1d103a3070b2126870eb52761d606ce"}, {"url": "https://git.kernel.org/stable/c/14a6e2eb7df5c7897c15b109cba29ab0c4a791b6"}], "title": "block: don't allow the same type rq_qos add more than once", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2022-50086", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-05T19:54:13.391019Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-05T20:00:16.456Z"}}]}}

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In that case, there will be two iocs enabled\nand running on one disk. They own different iocgs on their active list. In\nthe ioc_timer_fn function, because of the iocgs from two iocs have the\nsame root iocg, the root iocg's walk_list may be overwritten by each other\nand this leads to list add/del corruptions in building or destroying the\ninner_walk list.\n\nAnd so far, the blk-rq-qos framework works in case that one instance for\none type rq_qos per queue by default. This patch make this explicit and\nalso fix the crash above."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bloque: no permitir que el mismo tipo rq_qos se agregue m\u00e1s de una vez En nuestra prueba de iocost, encontramos algunas corrupciones de lista add/del de la lista inner_walk en ioc_timer_fn. La raz\u00f3n puede describirse de la siguiente manera: cpu 0 cpu 1 ioc_qos_write ioc_qos_write ioc = q_to_ioc(queue); if (!ioc) { ioc = kzalloc(); ioc = q_to_ioc(queue); if (!ioc) { ioc = kzalloc(); ... rq_qos_add(q, rqos); } ... rq_qos_add(q, rqos); ... } Cuando dos CPU escriben el archivo io.cost.qos simult\u00e1neamente, es posible que se agregue rq_qos a un disco dos veces. En ese caso, habr\u00e1 dos ioc habilitados y ejecut\u00e1ndose en un disco. Poseen diferentes iocgs en su lista activa. En la funci\u00f3n ioc_timer_fn, dado que los iocgs de dos iocs tienen el mismo iocg ra\u00edz, la lista walk_list de cada iocg ra\u00edz puede sobrescribirse entre s\u00ed, lo que provoca errores al agregar o eliminar listas al crear o destruir la lista inner_walk. Hasta ahora, el framework blk-rq-qos funciona con una instancia de un tipo rq_qos por cola por defecto. Este parche lo aclara y corrige el fallo mencionado."}], "id": "CVE-2022-50086", "lastModified": "2026-11-05T20:17:23.093", "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-2022-50086", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T19:54:13.391019Z", "version": "2.0.3"}}]}, "published": "2025-06-18T11:15:37.690", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/08ef66e800a85afc6b54cb95841f6502627eee2e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0b7f5d7a4d2a72ad9de04ab8ccba2a31904aa638"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0c9bb1acd1d103a3070b2126870eb52761d606ce"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/14a6e2eb7df5c7897c15b109cba29ab0c4a791b6"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: block: don't allow the same type rq_qos add more than once", "id": "2373611", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2373611"}, "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"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nblock: don't allow the same type rq_qos add more than once\nIn our test of iocost, we encountered some list add/del corruptions of\ninner_walk list in ioc_timer_fn.\nThe reason can be described as follows:\ncpu 0cpu 1\nioc_qos_writeioc_qos_write\nioc = q_to_ioc(queue);\nif (!ioc) {\nioc = kzalloc();\nioc = q_to_ioc(queue);\nif (!ioc) {\nioc = kzalloc();\n...\nrq_qos_add(q, rqos);\n}\n...\nrq_qos_add(q, rqos);\n...\n}\nWhen the io.cost.qos file is written by two cpus concurrently, rq_qos may\nbe added to one disk twice. In that case, there will be two iocs enabled\nand running on one disk. They own different iocgs on their active list. In\nthe ioc_timer_fn function, because of the iocgs from two iocs have the\nsame root iocg, the root iocg's walk_list may be overwritten by each other\nand this leads to list add/del corruptions in building or destroying the\ninner_walk list.\nAnd so far, the blk-rq-qos framework works in case that one instance for\none type rq_qos per queue by default. This patch make this explicit and\nalso fix the crash above."], "name": "CVE-2022-50086", "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": "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-06-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50086\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50086\nhttps://lore.kernel.org/linux-cve-announce/2025061858-CVE-2022-50086-6b94@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-06-23T08:45:29.354740+00:00", "updated": "2025-06-23T08:45:29.354789+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}