{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2022-49300", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T02:08:31.534Z", "datePublished": "2025-02-26T02:10:35.594Z", "dateUpdated": "2025-02-26T02:10:35.594Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-02-26T02:10:35.594Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: fix race between nbd_alloc_config() and module removal\n\nWhen nbd module is being removing, nbd_alloc_config() may be\ncalled concurrently by nbd_genl_connect(), although try_module_get()\nwill return false, but nbd_alloc_config() doesn't handle it.\n\nThe race may lead to the leak of nbd_config and its related\nresources (e.g, recv_workq) and oops in nbd_read_stat() due\nto the unload of nbd module as shown below:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000040\n Oops: 0000 [#1] SMP PTI\n CPU: 5 PID: 13840 Comm: kworker/u17:33 Not tainted 5.14.0+ #1\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)\n Workqueue: knbd16-recv recv_work [nbd]\n RIP: 0010:nbd_read_stat.cold+0x130/0x1a4 [nbd]\n Call Trace:\n recv_work+0x3b/0xb0 [nbd]\n process_one_work+0x1ed/0x390\n worker_thread+0x4a/0x3d0\n kthread+0x12a/0x150\n ret_from_fork+0x22/0x30\n\nFixing it by checking the return value of try_module_get()\nin nbd_alloc_config(). As nbd_alloc_config() may return ERR_PTR(-ENODEV),\nassign nbd->config only when nbd_alloc_config() succeeds to ensure\nthe value of nbd->config is binary (valid or NULL).\n\nAlso adding a debug message to check the reference counter\nof nbd_config during module removal."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/block/nbd.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "165cf2e0019fa6cedc75b456490c41494c34abb4", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "2573f2375b64280be977431701ed5d33b75b9ad0", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "8a7da4ced236ce6637fe70f14ca18e718d4bf9e9", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "122e4adaff2439f1cc18cc7e931980fa7560df5c", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "71c142f910da44421213ade601bcbd23ceae19fa", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "2888fa41985f93ed0a6837cfbb06bcbfd7fa2314", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "d09525720dd5201756f698bee1076de9aefd4602", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "c55b2b983b0fa012942c3eb16384b2b722caa810", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/block/nbd.c"], "versions": [{"version": "4.14.283", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.247", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.198", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.122", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.47", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.17.15", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.18.4", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/165cf2e0019fa6cedc75b456490c41494c34abb4"}, {"url": "https://git.kernel.org/stable/c/2573f2375b64280be977431701ed5d33b75b9ad0"}, {"url": "https://git.kernel.org/stable/c/8a7da4ced236ce6637fe70f14ca18e718d4bf9e9"}, {"url": "https://git.kernel.org/stable/c/122e4adaff2439f1cc18cc7e931980fa7560df5c"}, {"url": "https://git.kernel.org/stable/c/71c142f910da44421213ade601bcbd23ceae19fa"}, {"url": "https://git.kernel.org/stable/c/2888fa41985f93ed0a6837cfbb06bcbfd7fa2314"}, {"url": "https://git.kernel.org/stable/c/d09525720dd5201756f698bee1076de9aefd4602"}, {"url": "https://git.kernel.org/stable/c/c55b2b983b0fa012942c3eb16384b2b722caa810"}], "title": "nbd: fix race between nbd_alloc_config() and module removal", "x_generator": {"engine": "bippy-5f407fcff5a0"}}}}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "42074657-A7B6-4740-88B7-67B440018C1C", "versionEndExcluding": "4.14.283", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B8CFA0F4-2D75-41F4-9753-87944A08B53B", "versionEndExcluding": "4.19.247", "versionStartIncluding": "4.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "3EC49633-14DE-4EBD-BB80-76AE2E3EABB9", "versionEndExcluding": "5.4.198", "versionStartIncluding": "4.20", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "1B42AA01-44D8-4572-95E6-FF8E374CF9C5", "versionEndExcluding": "5.10.122", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "FC042EE3-4864-4325-BE0B-4BCDBF11AA61", "versionEndExcluding": "5.15.47", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "53E7AA2E-2FB4-45CA-A22B-08B4EDBB51AD", "versionEndExcluding": "5.17.15", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "FA6D643C-6D6A-4821-8A8D-B5776B8F0103", "versionEndExcluding": "5.18.4", "versionStartIncluding": "5.18", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnbd: fix race between nbd_alloc_config() and module removal\n\nWhen nbd module is being removing, nbd_alloc_config() may be\ncalled concurrently by nbd_genl_connect(), although try_module_get()\nwill return false, but nbd_alloc_config() doesn't handle it.\n\nThe race may lead to the leak of nbd_config and its related\nresources (e.g, recv_workq) and oops in nbd_read_stat() due\nto the unload of nbd module as shown below:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000040\n Oops: 0000 [#1] SMP PTI\n CPU: 5 PID: 13840 Comm: kworker/u17:33 Not tainted 5.14.0+ #1\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)\n Workqueue: knbd16-recv recv_work [nbd]\n RIP: 0010:nbd_read_stat.cold+0x130/0x1a4 [nbd]\n Call Trace:\n recv_work+0x3b/0xb0 [nbd]\n process_one_work+0x1ed/0x390\n worker_thread+0x4a/0x3d0\n kthread+0x12a/0x150\n ret_from_fork+0x22/0x30\n\nFixing it by checking the return value of try_module_get()\nin nbd_alloc_config(). As nbd_alloc_config() may return ERR_PTR(-ENODEV),\nassign nbd->config only when nbd_alloc_config() succeeds to ensure\nthe value of nbd->config is binary (valid or NULL).\n\nAlso adding a debug message to check the reference counter\nof nbd_config during module removal."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nbd: se corrige la ejecuci\u00f3n entre nbd_alloc_config() y la eliminaci\u00f3n del m\u00f3dulo Cuando se elimina el m\u00f3dulo nbd, nbd_alloc_config() puede ser llamado simult\u00e1neamente por nbd_genl_connect(), aunque try_module_get() devolver\u00e1 falso, pero nbd_alloc_config() no lo maneja. La ejecuci\u00f3n puede provocar la fuga de nbd_config y sus recursos relacionados (por ejemplo, recv_workq) y oops en nbd_read_stat() debido a la descarga del m\u00f3dulo nbd como se muestra a continuaci\u00f3n: ERROR: desreferencia de puntero NULL del n\u00facleo, direcci\u00f3n: 0000000000000040 Oops: 0000 [#1] SMP PTI CPU: 5 PID: 13840 Comm: kworker/u17:33 No contaminado 5.14.0+ #1 Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996) Cola de trabajo: knbd16-recv recv_work [nbd] RIP: 0010:nbd_read_stat.cold+0x130/0x1a4 [nbd] Rastreo de llamadas: recv_work+0x3b/0xb0 [nbd] process_one_work+0x1ed/0x390 worker_thread+0x4a/0x3d0 kthread+0x12a/0x150 ret_from_fork+0x22/0x30 Lo solucionamos comprobando el valor de retorno de try_module_get() en nbd_alloc_config(). Como nbd_alloc_config() puede devolver ERR_PTR(-ENODEV), asigne nbd->config solo cuando nbd_alloc_config() tenga \u00e9xito para garantizar que el valor de nbd->config sea binario (v\u00e1lido o NULL). Tambi\u00e9n se agreg\u00f3 un mensaje de depuraci\u00f3n para comprobar el contador de referencia de nbd_config durante la eliminaci\u00f3n del m\u00f3dulo."}], "id": "CVE-2022-49300", "lastModified": "2025-04-14T20:08:41.297", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-02-26T07:01:06.830", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/122e4adaff2439f1cc18cc7e931980fa7560df5c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/165cf2e0019fa6cedc75b456490c41494c34abb4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2573f2375b64280be977431701ed5d33b75b9ad0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2888fa41985f93ed0a6837cfbb06bcbfd7fa2314"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/71c142f910da44421213ade601bcbd23ceae19fa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8a7da4ced236ce6637fe70f14ca18e718d4bf9e9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c55b2b983b0fa012942c3eb16384b2b722caa810"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d09525720dd5201756f698bee1076de9aefd4602"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}, {"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: nbd: fix race between nbd_alloc_config() and module removal", "id": "2347658", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2347658"}, "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:\nnbd: fix race between nbd_alloc_config() and module removal\nWhen nbd module is being removing, nbd_alloc_config() may be\ncalled concurrently by nbd_genl_connect(), although try_module_get()\nwill return false, but nbd_alloc_config() doesn't handle it.\nThe race may lead to the leak of nbd_config and its related\nresources (e.g, recv_workq) and oops in nbd_read_stat() due\nto the unload of nbd module as shown below:\nBUG: kernel NULL pointer dereference, address: 0000000000000040\nOops: 0000 [#1] SMP PTI\nCPU: 5 PID: 13840 Comm: kworker/u17:33 Not tainted 5.14.0+ #1\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996)\nWorkqueue: knbd16-recv recv_work [nbd]\nRIP: 0010:nbd_read_stat.cold+0x130/0x1a4 [nbd]\nCall Trace:\nrecv_work+0x3b/0xb0 [nbd]\nprocess_one_work+0x1ed/0x390\nworker_thread+0x4a/0x3d0\nkthread+0x12a/0x150\nret_from_fork+0x22/0x30\nFixing it by checking the return value of try_module_get()\nin nbd_alloc_config(). As nbd_alloc_config() may return ERR_PTR(-ENODEV),\nassign nbd->config only when nbd_alloc_config() succeeds to ensure\nthe value of nbd->config is binary (valid or NULL).\nAlso adding a debug message to check the reference counter\nof nbd_config during module removal."], "name": "CVE-2022-49300", "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": "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": "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": "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": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49300\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49300\nhttps://lore.kernel.org/linux-cve-announce/2025022634-CVE-2022-49300-a91a@gregkh/T"], "threat_severity": "Moderate"}