195 lines
10 KiB
JSON
195 lines
10 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-2022-48985",
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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": "2024-08-22T01:27:53.633Z",
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"datePublished": "2024-10-21T20:06:01.802Z",
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"dateUpdated": "2026-08-05T08:53:15.213Z"
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},
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"cna": {
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T08:53:15.213Z"
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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: mana: Fix race on per-CQ variable napi work_done\n\nAfter calling napi_complete_done(), the NAPIF_STATE_SCHED bit may be\ncleared, and another CPU can start napi thread and access per-CQ variable,\ncq->work_done. If the other thread (for example, from busy_poll) sets\nit to a value >= budget, this thread will continue to run when it should\nstop, and cause memory corruption and panic.\n\nTo fix this issue, save the per-CQ work_done variable in a local variable\nbefore napi_complete_done(), so it won't be corrupted by a possible\nconcurrent thread after napi_complete_done().\n\nAlso, add a flag bit to advertise to the NIC firmware: the NAPI work_done\nvariable race is fixed, so the driver is able to reliably support features\nlike busy_poll."
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}
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],
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{
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 9.8,
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"baseSeverity": "CRITICAL"
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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:N - The bug is in MANA NAPI CQ polling on packet RX/TX completions; remote peers of internet-facing Azure VMs deliver traffic that raises interrupts and schedules the vulnerable mana_poll path. MANA RX NAPI uses weight 1, so remote packet-driven races after napi_complete_done are a network attack path.\nAC:L - After napi_complete_done clears SCHED, a concurrent NAPI (busy_poll or another CPU’s softirq from further packets) can overwrite cq->work_done; the attacker controls packet rate and can sustain load so the post-complete window is hit reliably. Race guidance treats attacker-influenced concurrent NAPI as AC:L.\nPR:N - Unauthenticated remote traffic to the MANA interface is enough to schedule softirq NAPI and induce the post-complete race; no local account, capabilities, or authentication is required.\nUI:N - Exploitation is driven by packet arrivals and kernel NAPI/softirq processing with no victim user action such as mounting a filesystem or opening a crafted file.\nS:U - Corruption and panic stay inside the guest kernel’s authority on the Azure VM; this is not a VM escape, IOMMU bypass, or other cross-boundary impact.\nC:H - Wrong work_done after complete violates NAPI ownership and enables concurrent CQ polling, double-processing RX buffers, and page/skb UAF-style reuse, which conservatively yields an arbitrary read primitive.\nI:H - The same concurrent CQ/NAPI ownership break causes double dma_unmap/free and heap corruption that can be leveraged for writes and control-flow hijacking, so integrity is High.\nA:H - The fix commit documents memory corruption and panic; NAPI list/state corruption and UAF/oops under concurrent poll produce a full kernel availability loss."
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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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"drivers/net/ethernet/microsoft/mana/gdma.h",
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"drivers/net/ethernet/microsoft/mana/mana_en.c"
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],
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"versions": [
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"lessThan": "fe50a9bbeb1f042e756c5cfa7708112c944368de",
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"status": "affected",
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"programFiles": [
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"drivers/net/ethernet/microsoft/mana/gdma.h",
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"drivers/net/ethernet/microsoft/mana/mana_en.c"
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],
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"versions": [
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{
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"version": "5.15",
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"status": "affected"
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},
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"version": "0",
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"lessThan": "5.15",
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"status": "unaffected",
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"versionType": "semver"
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},
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"version": "5.15.83",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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},
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{
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"version": "6.0.13",
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"lessThanOrEqual": "6.0.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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"nodes": [
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/fe50a9bbeb1f042e756c5cfa7708112c944368de"
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},
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"url": "https://git.kernel.org/stable/c/6740d8572ccd1bca50d8a1ca2bedc333f50ed5f3"
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}
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"title": "net: mana: Fix race on per-CQ variable napi work_done",
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"type": "ssvc",
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"content": {
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"id": "CVE-2022-48985",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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{
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"Technical Impact": "partial"
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],
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"version": "2.0.3",
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"timestamp": "2024-10-22T13:17:20.394145Z"
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}
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"title": "CISA ADP Vulnrichment",
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} |