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vuln-cve/data/2024/35xxx/CVE-2024-35915.json
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{
"dataType": "CVE_RECORD",
"cveMetadata": {
"cveId": "CVE-2024-35915",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2024-05-17T13:50:33.122Z",
"datePublished": "2024-05-19T08:35:08.239Z",
"dateUpdated": "2026-10-15T00:41:24.840Z"
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"dateUpdated": "2026-08-05T11:30:57.434Z"
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{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: nci: Fix uninit-value in nci_dev_up and nci_ntf_packet\n\nsyzbot reported the following uninit-value access issue [1][2]:\n\nnci_rx_work() parses and processes received packet. When the payload\nlength is zero, each message type handler reads uninitialized payload\nand KMSAN detects this issue. The receipt of a packet with a zero-size\npayload is considered unexpected, and therefore, such packets should be\nsilently discarded.\n\nThis patch resolved this issue by checking payload size before calling\neach message type handler codes."
}
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"version": "3.1",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 8.8,
"baseSeverity": "HIGH"
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"value": "AV:A - NCI control/notification frames are delivered to `nci_rx_work()` by the NFC controller whose notification stream is driven by an NFC peer/tag in adjacent RF range, and the same parser is fed by the N_NCI tty line discipline and /dev/virtual_nci on the local host. This matches the kernel CNA's scoring of the directly related NCI packet-validation fixes (CVE-2025-40043, CVE-2026-43291, CVE-2026-63915) as Adjacent.\nAC:L - Triggering only requires that a single NCI frame with a zero payload length field reach the RX queue; the missing check is unconditional, with no race, timing window, or memory-layout precondition. Every dispatch through `nci_rsp_packet()`/`nci_ntf_packet()` then reads past the received data deterministically.\nPR:N - The RF-side path requires no authentication or privileges of any kind — an NFC peer in range needs no credentials, and the NCI parser runs before any application-level policy. The local fallbacks (N_NCI ldisc via TIOCSETD on a pty) are reachable by an ordinary unprivileged user.\nUI:N - Frames are consumed by the `nci_rx_work` workqueue as soon as they are queued by `nci_recv_frame()`; NFC polling/discovery runs autonomously on the device. No victim action is needed.\nS:U - The uninitialized reads, out-of-bounds accesses, and state corruption are all confined to kernel memory and the NFC device state within the same security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - Uninitialized/out-of-bounds heap bytes are memcpy'd into `nfc_target.nfcid1`, `sensb_res`, and `sensf_res` by `nci_extract_rf_params_*()` and then exported to userspace by `nfc_genl_send_target()` as netlink attributes, a direct kernel heap information leak; `nci_core_init_rsp_packet_v1()` additionally reads up to ~270 bytes past the payload via an uninitialized `num_supported_rf_interfaces` offset.\nI:H - `nci_core_conn_credits_ntf_packet()` writes `conn_entries[i].conn_id` back into the skb beyond the received payload and adds uninitialized credit values to connection flow control, while uninit values are stored into `ndev->nci_ver`, `max_ctrl_pkt_payload_len`, `supported_rf_interfaces`, and `manufact_specific_info`, corrupting kernel state used by subsequent parsing and transmission decisions.\nA:H - Out-of-bounds reads past the skb buffer and the corrupted length/interface counts driving further parsing can fault or oops the kernel, and the poisoned NCI device state (credit counters, `nci_ver`, packet length limits) leaves the NFC stack in an inconsistent state. Any such memory-safety error in softirq/workqueue context is a full kernel crash."
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