194 lines
9.6 KiB
JSON
194 lines
9.6 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveId": "CVE-2021-47215",
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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": "2024-04-10T18:59:19.528Z",
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"datePublished": "2024-04-10T19:01:55.157Z",
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"dateUpdated": "2026-08-05T08:46:45.596Z"
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"dateUpdated": "2026-08-05T08:46:45.596Z"
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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/mlx5e: kTLS, Fix crash in RX resync flow\n\nFor the TLS RX resync flow, we maintain a list of TLS contexts\nthat require some attention, to communicate their resync information\nto the HW.\nHere we fix list corruptions, by protecting the entries against\nmovements coming from resync_handle_seq_match(), until their resync\nhandling in napi is fully completed."
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}
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],
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"metrics": [
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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 buggy path is mlx5e kTLS RX resync (mlx5e_ktls_rx_resync → resync_handle_seq_match), invoked from the TLS stack when processing records from a remote peer after the NIC signals CQE_TLS_OFFLOAD_RESYNC; kTLS bugs driven by remote peer data are Network per guidance.\nAC:L - A remote peer can induce HW stream desync (reorder/loss/stream-scan) and then flood TLS records so multiple seq-match callbacks re-add the same priv_rx while it remains on the resync or NAPI local list; the attacker drives both the match callbacks and the RX/NAPI activity that opens the window.\nPR:N - Triggering requires only connecting as a TLS client to a service that has installed kTLS RX hardware offload on an mlx5 NIC; no local OS privileges or authenticated kernel credentials are needed.\nUI:N - The victim need only already be serving TLS with mlx5 kTLS RX offload; the attacker alone completes the handshake and drives the resync/race traffic with no further user action.\nS:U - List corruption stays within host kernel heap/list state for the mlx5e/TLS offload contexts and does not cross a VM, IOMMU, or other separate security authority.\nC:H - Double list_add of an in-list node corrupts neighboring list pointers and yields classic heap UAF when those links are later walked, which can be groomed for arbitrary kernel memory disclosure.\nI:H - Subsequent list_del/list_move/splice through the corrupted pointers write into attacker-influenced addresses, providing a heap corruption and control-flow hijack primitive beyond a mere crash.\nA:H - The fix explicitly addresses a crash from list corruption in the RX resync flow; corrupted list walks produce kernel oops/BUG (list_debug) that fully disrupt host availability."
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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/mellanox/mlx5/core/en_accel/ktls_rx.c"
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],
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"versions": [
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{
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"programFiles": [
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"drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_rx.c"
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],
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"versions": [
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{
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"version": "5.13",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.13",
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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": "5.15.5",
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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": "5.16",
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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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"title": "net/mlx5e: kTLS, Fix crash in RX resync flow",
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"content": {
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"id": "CVE-2021-47215",
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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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"Automatable": "no"
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"timestamp": "2024-09-10T15:49:52.131087Z"
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"title": "CISA ADP Vulnrichment",
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