354 lines
17 KiB
JSON
354 lines
17 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2023-52654",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-03-06T09:52:12.098Z",
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"datePublished": "2024-05-09T16:37:04.293Z",
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"dateUpdated": "2026-08-05T09:10:52.194Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T09:10:52.194Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"io_uring/rsrc.h",
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"net/core/scm.c"
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],
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"versions": [
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"status": "affected",
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"net/core/scm.c"
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