335 lines
16 KiB
JSON
335 lines
16 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"cveMetadata": {
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"cveId": "CVE-2023-52454",
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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": "2024-02-20T12:30:33.293Z",
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"datePublished": "2024-02-23T14:46:17.827Z",
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"dateUpdated": "2026-08-05T09:10:04.196Z"
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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": "2026-08-05T09:10:04.196Z"
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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\nnvmet-tcp: Fix a kernel panic when host sends an invalid H2C PDU length\n\nIf the host sends an H2CData command with an invalid DATAL,\nthe kernel may crash in nvmet_tcp_build_pdu_iovec().\n\nUnable to handle kernel NULL pointer dereference at\nvirtual address 0000000000000000\nlr : nvmet_tcp_io_work+0x6ac/0x718 [nvmet_tcp]\nCall trace:\n process_one_work+0x174/0x3c8\n worker_thread+0x2d0/0x3e8\n kthread+0x104/0x110\n\nFix the bug by raising a fatal error if DATAL isn't coherent\nwith the packet size.\nAlso, the PDU length should never exceed the MAXH2CDATA parameter which\nhas been communicated to the host in nvmet_tcp_handle_icreq()."
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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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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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:N - nvmet-tcp is an NVMe-over-TCP target that listens on a TCP port and processes H2CData PDUs from remote initiators via nvmet_tcp_data_ready → nvmet_tcp_io_work → nvmet_tcp_handle_h2c_data_pdu.\nAC:L - The attacker deterministically triggers the bug by sending an H2CData PDU with an invalid DATAL (incoherent with plen, zero, or oversized); no race or attacker-independent condition is required.\nPR:N - H2CData is accepted after the unauthenticated ICREQ/ICRESP handshake, before Connect host-NQN checks or optional DH-HMAC-CHAP, so an unauthenticated network peer can reach the vulnerable handler.\nUI:N - Exploitation requires only crafted NVMe/TCP PDUs to the listening target; no local user or administrator action is needed.\nS:U - The NULL dereference crashes the kernel running the nvmet-tcp target; impact stays within that system's security authority with no VM/IOMMU/sandbox boundary crossing.\nC:N - The documented failure is a NULL pointer dereference at address 0 in nvmet_tcp_build_pdu_iovec(); there is no out-of-bounds read or other information-disclosure primitive.\nI:N - The bug is a NULL pointer read that oopses before any OOB write or control-flow hijack; it does not provide an arbitrary write primitive.\nA:H - The NULL dereference in the nvmet-tcp workqueue path produces a kernel oops/panic, and a remote peer can repeat the trigger to deny service."
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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/nvme/target/tcp.c"
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],
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"versions": [
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],
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"version": "0",
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},
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"status": "unaffected",
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},
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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