CVE-2023-52654

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The safest fix would be to completely\ndisallow sending io_uring files via sockets via SCM_RIGHT, so there\nare no possible cycles invloving registered files and thus rendering\nSCM accounting on the io_uring side unnecessary."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - Triggered via local syscalls only (io_uring_setup, unix socketpair/sendmsg with SCM_RIGHTS, recvmsg); io_uring and AF_UNIX are local IPC paths, not reachable by remote packet processing.\nAC:L - The attacker fully controls both sides of the race\u2014creating the io_uring instance and unix sockets, sending the ring FD via SCM_RIGHTS, triggering unix_gc, and racing concurrent recvmsg\u2014and can retry until the GC vs unix_stream_read_generic window is won.\nPR:L - io_uring_setup is available to ordinary unprivileged users by default (sysctl io_uring_disabled=0), and AF_UNIX socket/SCM_RIGHTS operations require no capabilities.\nUI:N - Exploitation needs only the attacker's own io_uring and unix-socket operations; no separate victim action is required.\nS:U - This is a standard in-kernel UAF enabling local privilege escalation within the same host kernel authority; it does not cross a VM, IOMMU, or sandbox boundary.\nC:H - Confirmed use-after-free of an SKB (and associated SCM file state) when unix_gc frees a buffer still held by unix_stream_read_generic; UAF of reclaimable heap objects yields an arbitrary kernel read/disclosure primitive.\nI:H - The same SKB UAF is heap-sprayable into write and control-flow hijack primitives, enabling integrity compromise and arbitrary code execution in the kernel (as also assessed for sister CVE-2023-6531).\nA:H - The UAF causes kernel oops/panic when freed SKB memory is accessed during the race, producing a full availability impact even without further exploitation."}]}], "affected": [{"product": "Linux", 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resolved:\n\nio_uring/af_unix: disable sending io_uring over sockets\n\nFile reference cycles have caused lots of problems for io_uring\nin the past, and it still doesn't work exactly right and races with\nunix_stream_read_generic(). The safest fix would be to completely\ndisallow sending io_uring files via sockets via SCM_RIGHT, so there\nare no possible cycles invloving registered files and thus rendering\nSCM accounting on the io_uring side unnecessary."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: io_uring/af_unix: deshabilita el env\u00edo de io_uring a trav\u00e9s de sockets Los ciclos de referencia de archivos han causado muchos problemas para io_uring en el pasado, y todav\u00eda no funciona exactamente correctamente y corre con unix_stream_read_generic(). La soluci\u00f3n m\u00e1s segura ser\u00eda no permitir por completo el env\u00edo de archivos io_uring a trav\u00e9s de sockets a trav\u00e9s de SCM_RIGHT, de modo que no haya ciclos posibles que involucren archivos registrados y, por lo tanto, hagan innecesaria la contabilidad SCM en el lado io_uring."}], "id": "CVE-2023-52654", "lastModified": "2026-08-04T10:18:36.427", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-52654", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-05-09T18:37:06.033789Z", "version": "2.0.3"}}]}, "published": "2024-05-14T14:23:13.130", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/18824f592aad4124d79751bbc1500ea86ac3ff29"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3fe1ea5f921bf5b71cbfdc4469fb96c05936610e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5a33d385eb36991a91e3dddb189d8679e2aac2be"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/705318a99a138c29a512a72c3e0043b3cd7f55f4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bcedd497b3b4a0be56f3adf7c7542720eced0792"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f2f57f51b53be153a522300454ddb3887722fb2c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/18824f592aad4124d79751bbc1500ea86ac3ff29"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3fe1ea5f921bf5b71cbfdc4469fb96c05936610e"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5a33d385eb36991a91e3dddb189d8679e2aac2be"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/705318a99a138c29a512a72c3e0043b3cd7f55f4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bcedd497b3b4a0be56f3adf7c7542720eced0792"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f2f57f51b53be153a522300454ddb3887722fb2c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: io_uring/af_unix: disable sending io_uring over sockets", "id": "2280458", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2280458"}, "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:\nio_uring/af_unix: disable sending io_uring over sockets\nFile reference cycles have caused lots of problems for io_uring\nin the past, and it still doesn't work exactly right and races with\nunix_stream_read_generic(). The safest fix would be to completely\ndisallow sending io_uring files via sockets via SCM_RIGHT, so there\nare no possible cycles invloving registered files and thus rendering\nSCM accounting on the io_uring side unnecessary.", "A security vulnerability was identified in the Linux kernel's io_uring subsystem, specifically related to the handling of file descriptors over UNIX domain sockets. The issue arises from the potential for file reference cycles when io_uring file descriptors are transmitted over sockets using the SCM_RIGHTS mechanism. These cycles can lead to resource leaks and race conditions, particularly with the unix_stream_read_generic() function."], "name": "CVE-2023-52654", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not 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": "2024-05-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-52654\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-52654\nhttps://lore.kernel.org/linux-cve-announce/2024050833-CVE-2023-52654-1ae1@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-07-13T11:22:34.827993+00:00", "updated": "2025-07-13T11:22:34.828074+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}