{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-52654", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-03-06T09:52:12.098Z", "datePublished": "2024-05-09T16:37:04.293Z", "dateUpdated": "2026-08-05T09:10:52.194Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:10:52.194Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been 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." } ], "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—creating the io_uring instance and unix sockets, sending the ring FD via SCM_RIGHTS, triggering unix_gc, and racing concurrent recvmsg—and 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", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "io_uring/rsrc.h", "net/core/scm.c" ], "versions": [ { "version": "04df9719df1865f6770af9bc7880874af0e594b2", "lessThan": "18824f592aad4124d79751bbc1500ea86ac3ff29", "status": "affected", "versionType": "git" }, { "version": "c378c479c5175833bb22ff71974cda47d7b05401", "lessThan": "3fe1ea5f921bf5b71cbfdc4469fb96c05936610e", "status": "affected", "versionType": "git" }, { "version": "813d8fe5d30388f73a21d3a2bf46b0a1fd72498c", "lessThan": "bcedd497b3b4a0be56f3adf7c7542720eced0792", "status": "affected", "versionType": "git" }, { "version": "0091bfc81741b8d3aeb3b7ab8636f911b2de6e80", "lessThan": "f2f57f51b53be153a522300454ddb3887722fb2c", "status": "affected", "versionType": "git" }, { "version": "0091bfc81741b8d3aeb3b7ab8636f911b2de6e80", "lessThan": "5a33d385eb36991a91e3dddb189d8679e2aac2be", "status": "affected", "versionType": "git" }, { "version": "0091bfc81741b8d3aeb3b7ab8636f911b2de6e80", "lessThan": "705318a99a138c29a512a72c3e0043b3cd7f55f4", "status": "affected", "versionType": "git" }, { "version": "b4293c01ee0d0ecdd3cb5801e13f62271144667a", "status": "affected", "versionType": "git" }, { "version": "75e94c7e8859e58aadc15a98cc9704edff47d4f2", "status": "affected", "versionType": "git" }, { "version": "5.4.220", "lessThan": "5.4.264", "status": "affected", "versionType": "semver" }, { "version": "5.10.150", "lessThan": "5.10.204", "status": "affected", "versionType": "semver" }, { "version": "5.15.75", "lessThan": "5.15.143", "status": "affected", "versionType": "semver" }, { "version": "5.19.17", "lessThan": "5.20", "status": "affected", "versionType": "semver" }, { "version": "6.0.3", "lessThan": "6.1", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "io_uring/rsrc.h", "net/core/scm.c" ], "versions": [ { "version": "6.1", "status": "affected" }, { "version": "0", "lessThan": "6.1", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.264", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.204", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.143", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.68", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.7", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.7", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": 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