{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "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": "2026-05-11T18:57:00.337Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T18:57:00.337Z" }, "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": "5ea8d10802ec4c153a6e21eebaf412e2abd29736", "lessThan": "165cf2e0019fa6cedc75b456490c41494c34abb4", "status": "affected", "versionType": "git" }, { "version": "5ea8d10802ec4c153a6e21eebaf412e2abd29736", "lessThan": "2573f2375b64280be977431701ed5d33b75b9ad0", "status": "affected", "versionType": "git" }, { "version": "5ea8d10802ec4c153a6e21eebaf412e2abd29736", "lessThan": "8a7da4ced236ce6637fe70f14ca18e718d4bf9e9", "status": "affected", "versionType": "git" }, { "version": "5ea8d10802ec4c153a6e21eebaf412e2abd29736", "lessThan": "122e4adaff2439f1cc18cc7e931980fa7560df5c", "status": "affected", "versionType": "git" }, { "version": "5ea8d10802ec4c153a6e21eebaf412e2abd29736", "lessThan": "71c142f910da44421213ade601bcbd23ceae19fa", "status": "affected", "versionType": "git" }, { "version": "5ea8d10802ec4c153a6e21eebaf412e2abd29736", "lessThan": "2888fa41985f93ed0a6837cfbb06bcbfd7fa2314", "status": "affected", "versionType": "git" }, { "version": "5ea8d10802ec4c153a6e21eebaf412e2abd29736", "lessThan": "d09525720dd5201756f698bee1076de9aefd4602", "status": "affected", "versionType": "git" }, { "version": "5ea8d10802ec4c153a6e21eebaf412e2abd29736", "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": "4.12", "status": "affected" }, { "version": "0", "lessThan": "4.12", "status": "unaffected", "versionType": "semver" }, { "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" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "4.14.283" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "4.19.247" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.4.198" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.10.122" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.15.47" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.17.15" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.18.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.19" } ] } ] } ], "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-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 4.7, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2022-49300", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2025-10-01T19:44:48.211252Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-476", "description": "CWE-476 NULL Pointer Dereference" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T19:46:59.286Z" } } ] } }