CVE-2021-47616

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Creating the device itself only needs CAP_NET_ADMIN, which is also obtainable in a user+net namespace.\nUI:N - Exploitation requires only attacker-controlled syscalls; no victim action such as mounting a filesystem or opening a malicious file is needed.\nS:U - This is standard kernel heap corruption leading to privilege escalation within the same host security authority, with no VM escape or IOMMU/cross-boundary impact.\nC:H - The vulnerability is a use-after-free/double-free of the send queue object; per kernel UAF guidance this enables reclaim of the freed object and arbitrary kernel memory disclosure.\nI:H - Double-free of the kmalloc'd rxe_queue (and associated buffer) is classic heap corruption that can be turned into arbitrary write / control-flow hijacking via heap shaping.\nA:H - The UAF reliably produces a kernel oops/crash (as seen in the syzbot KASAN report in rxe_queue_cleanup), so availability impact is High."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/infiniband/sw/rxe/rxe_qp.c"], "versions": [{"version": "514aee660df493cd673154a6ba6bab745ec47b8c", "lessThan": "acb53e47db1fbc7cd37ab10b46388f045a76e383", "status": "affected", "versionType": "git"}, {"version": "514aee660df493cd673154a6ba6bab745ec47b8c", "lessThan": "84b01721e8042cdd1e8ffeb648844a09cd4213e0", "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/infiniband/sw/rxe/rxe_qp.c"], "versions": [{"version": "5.15", "status": "affected"}, {"version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.10", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.16", "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": "5.15", "versionEndExcluding": "5.15.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "5.16"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/acb53e47db1fbc7cd37ab10b46388f045a76e383"}, {"url": "https://git.kernel.org/stable/c/84b01721e8042cdd1e8ffeb648844a09cd4213e0"}], "title": "RDMA: Fix use-after-free in rxe_queue_cleanup", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:47:40.519Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/acb53e47db1fbc7cd37ab10b46388f045a76e383", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/84b01721e8042cdd1e8ffeb648844a09cd4213e0", "tags": ["x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47616", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T17:11:45.722005Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:34:50.651Z"}}]}}

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{"bugzilla": {"description": "kernel: RDMA: Fix use-after-free in rxe_queue_cleanup", "id": "2293263", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2293263"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.6", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:H", "status": "draft"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nRDMA: Fix use-after-free in rxe_queue_cleanup\nOn error handling path in rxe_qp_from_init() qp->sq.queue is freed and\nthen rxe_create_qp() will drop last reference to this object. qp clean up\nfunction will try to free this queue one time and it causes UAF bug.\nFix it by zeroing queue pointer after freeing queue in rxe_qp_from_init()."], "name": "CVE-2021-47616", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-06-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47616\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47616\nhttps://lore.kernel.org/linux-cve-announce/2024061909-CVE-2021-47616-5ee0@gregkh/T"], "threat_severity": "Low"}

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