329 lines
16 KiB
JSON
329 lines
16 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-2023-52522",
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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": "2024-02-20T12:30:33.317Z",
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"datePublished": "2024-03-02T21:52:29.710Z",
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"dateUpdated": "2026-08-05T09:10:22.569Z"
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},
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"cna": {
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T09:10:22.569Z"
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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\nnet: fix possible store tearing in neigh_periodic_work()\n\nWhile looking at a related syzbot report involving neigh_periodic_work(),\nI found that I forgot to add an annotation when deleting an\nRCU protected item from a list.\n\nReaders use rcu_deference(*np), we need to use either\nrcu_assign_pointer() or WRITE_ONCE() on writer side\nto prevent store tearing.\n\nI use rcu_assign_pointer() to have lockdep support,\nthis was the choice made in neigh_flush_dev()."
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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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"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.8,
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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:A - The vulnerable unmarked store runs in neigh_periodic_work() while lockless RCU readers in ___neigh_lookup_noref() walk the same hash chains during ARP/NDISC and L2 resolution. An adjacent LAN/WiFi attacker can populate stale neighbour entries via ARP/ND and concurrently drive lookups, which is the highest reasonable reachability for this subsystem.\nAC:L - The attacker controls the reader side with continuous adjacent traffic and can force GC-eligible entries by filling the neighbour table past gc_thresh1 and letting entries go stale, so both sides of the race are attacker-driven rather than a blind wait for an uncontrolled condition.\nPR:N - ARP/NDISC packet processing and subsequent neighbour lookups require no authentication or local account on the victim; an unauthenticated adjacent peer can create entries and trigger concurrent RCU readers.\nUI:N - Exploitation requires only attacker-sent frames and the kernel's periodic GC workqueue; no victim user action such as mounting a filesystem or opening a file is needed.\nS:U - Impact is confined to kernel memory and availability within the same host security authority; this is ordinary in-kernel corruption/DoS, not a VM escape, IOMMU bypass, or sandbox boundary cross.\nC:H - Store tearing on an RCU-protected neighbour next pointer can expose readers to a corrupted pointer while walking the hash chain, and under the highest-severity reading that memory corruption enables use of unintended kernel objects and arbitrary disclosure primitives.\nI:H - The same corrupted-pointer walk is memory corruption on a core networking structure; following a torn next pointer can be leveraged for unintended writes or control-flow hijack rather than being limited to a benign crash.\nA:H - A torn or otherwise invalid neighbour pointer dereferenced on the packet/lookup fast path causes kernel oops/panic or hangs in networking, which is a high availability impact."
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}
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]
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}
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],
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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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"net/core/neighbour.c"
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"version": "0",
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"version": "6.1.57",
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"status": "unaffected",
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"version": "6.6",
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"content": {
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"timestamp": "2024-03-05T20:28:00.493037Z",
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"id": "CVE-2023-52522",
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"options": [
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