{"api_version":"1","generated_at":"2026-04-23T02:35:02+00:00","cve":"CVE-2021-3348","urls":{"html":"https://cve.report/CVE-2021-3348","api":"https://cve.report/api/cve/CVE-2021-3348.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-3348","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-3348"},"summary":{"title":"CVE-2021-3348","description":"nbd_add_socket in drivers/block/nbd.c in the Linux kernel through 5.10.12 has an ndb_queue_rq use-after-free that could be triggered by local attackers (with access to the nbd device) via an I/O request at a certain point during device setup, aka CID-b98e762e3d71.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2021-02-01 04:15:00","updated_at":"2022-04-26 16:17:00"},"problem_types":["CWE-362","CWE-416"],"metrics":[],"references":[{"url":"https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html","name":"[debian-lts-announce] 20210330 [SECURITY] [DLA 2610-1] linux-4.19 security update","refsource":"MLIST","tags":[],"title":"[SECURITY] [DLA 2610-1] linux-4.19 security update","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b98e762e3d71e893b221f871825dc64694cfb258","name":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b98e762e3d71e893b221f871825dc64694cfb258","refsource":"MISC","tags":["Mailing List","Patch","Vendor Advisory"],"title":"kernel/git/torvalds/linux.git - Linux kernel source tree","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.openwall.com/lists/oss-security/2021/01/28/3","name":"https://www.openwall.com/lists/oss-security/2021/01/28/3","refsource":"MISC","tags":["Mailing List","Patch","Third Party Advisory"],"title":"oss-security - Linux kernel: linux-block: nbd: use-after-free Read in nbd_queue_rq","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.openwall.com/lists/oss-security/2021/02/01/1","name":"[oss-security] 20210201 Re: Re: Linux kernel: linux-block: nbd: use-after-free Read in nbd_queue_rq","refsource":"MLIST","tags":["Mailing List","Patch","Third Party Advisory"],"title":"oss-security - Re: Re: Linux kernel: linux-block: nbd:\n use-after-free Read in nbd_queue_rq","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-3348","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3348","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"3348","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"debian","cpe5":"debian_linux","cpe6":"9.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"3348","vulnerable":"1","versionEndIncluding":"5.10.12","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2021-3348","qid":"159492","title":"Oracle Enterprise Linux Security Update for kernel (ELSA-2021-4356)"},{"cve":"CVE-2021-3348","qid":"178507","title":"Debian Security Update for linux-4.19 (DLA 2610-1)"},{"cve":"CVE-2021-3348","qid":"179955","title":"Debian Security Update for linux (CVE-2021-3348)"},{"cve":"CVE-2021-3348","qid":"198304","title":"Ubuntu Security Notification for Linux-oem-5.10 Vulnerabilities (USN-4884-1)"},{"cve":"CVE-2021-3348","qid":"198324","title":"Ubuntu Security Notification for Linux kernel vulnerabilities (USN-4907-1)"},{"cve":"CVE-2021-3348","qid":"198325","title":"Ubuntu Security Notification for Linux kernel vulnerabilities (USN-4909-1)"},{"cve":"CVE-2021-3348","qid":"198326","title":"Ubuntu Security Notification for Linux kernel vulnerabilities (USN-4910-1)"},{"cve":"CVE-2021-3348","qid":"239816","title":"Red Hat Update for kernel security (RHSA-2021:4356)"},{"cve":"CVE-2021-3348","qid":"239879","title":"Red Hat Update for kernel-rt (RHSA-2021:4140)"},{"cve":"CVE-2021-3348","qid":"353131","title":"Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.4-2022-020"},{"cve":"CVE-2021-3348","qid":"377055","title":"Alibaba Cloud Linux Security Update for cloud-kernel (ALINUX2-SA-2021:0027)"},{"cve":"CVE-2021-3348","qid":"6140370","title":"AWS Bottlerocket Security Update for kernel (GHSA-qrpq-fg62-m5cm)"},{"cve":"CVE-2021-3348","qid":"670345","title":"EulerOS Security Update for kernel (EulerOS-SA-2021-1879)"},{"cve":"CVE-2021-3348","qid":"670375","title":"EulerOS Security Update for kernel (EulerOS-SA-2021-1950)"},{"cve":"CVE-2021-3348","qid":"670396","title":"EulerOS Security Update for kernel (EulerOS-SA-2021-1929)"},{"cve":"CVE-2021-3348","qid":"670936","title":"EulerOS Security Update for kernel (EulerOS-SA-2021-1929)"},{"cve":"CVE-2021-3348","qid":"750373","title":"OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:0241-1)"},{"cve":"CVE-2021-3348","qid":"900098","title":"CBL-Mariner Linux Security Update for kernel 5.4.91"},{"cve":"CVE-2021-3348","qid":"903076","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (3857)"},{"cve":"CVE-2021-3348","qid":"940265","title":"AlmaLinux Security Update for kernel (ALSA-2021:4356)"}]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2021-3348","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"nbd_add_socket in drivers/block/nbd.c in the Linux kernel through 5.10.12 has an ndb_queue_rq use-after-free that could be triggered by local attackers (with access to the nbd device) via an I/O request at a certain point during device setup, aka CID-b98e762e3d71."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b98e762e3d71e893b221f871825dc64694cfb258","refsource":"MISC","name":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b98e762e3d71e893b221f871825dc64694cfb258"},{"url":"https://www.openwall.com/lists/oss-security/2021/01/28/3","refsource":"MISC","name":"https://www.openwall.com/lists/oss-security/2021/01/28/3"},{"refsource":"MLIST","name":"[oss-security] 20210201 Re: Re: Linux kernel: linux-block: nbd: use-after-free Read in nbd_queue_rq","url":"http://www.openwall.com/lists/oss-security/2021/02/01/1"},{"refsource":"MLIST","name":"[debian-lts-announce] 20210330 [SECURITY] [DLA 2610-1] linux-4.19 security update","url":"https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html"}]}},"nvd":{"publishedDate":"2021-02-01 04:15:00","lastModifiedDate":"2022-04-26 16:17:00","problem_types":["CWE-362","CWE-416"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":7,"baseSeverity":"HIGH"},"exploitabilityScore":1,"impactScore":5.9},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:L/AC:M/Au:N/C:P/I:P/A:P","accessVector":"LOCAL","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL","baseScore":4.4},"severity":"MEDIUM","exploitabilityScore":3.4,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndIncluding":"5.10.12","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"3348","Ordinal":"201481","Title":"CVE-2021-3348","CVE":"CVE-2021-3348","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"3348","Ordinal":"1","NoteData":"nbd_add_socket in drivers/block/nbd.c in the Linux kernel through 5.10.12 has an ndb_queue_rq use-after-free that could be triggered by local attackers (with access to the nbd device) via an I/O request at a certain point during device setup, aka CID-b98e762e3d71.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"3348","Ordinal":"2","NoteData":"2021-01-31","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"3348","Ordinal":"3","NoteData":"2021-03-30","Type":"Other","Title":"Modified"}]}}}