{
  "cveId": "CVE-2026-74694",
  "url": "https://patchblox.com/security/cve/CVE-2026-74694",
  "summary": "CVE-2026-74694 is fixed in 17 products on 1 platform, first by DEBIAN-CVE-2026-74694, released August 27, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "net/ncsi: fix heap OOB read in NCSI_CMD_SEND_CMD payload length",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  net/ncsi: fix heap OOB read in NCSI_CMD_SEND_CMD payload length  ncsi_send_cmd_nl() takes the number of bytes to copy from the attacker-controlled ncsi_pkt_hdr.length field of the in-band packet header, while the source buffer is the NCSI_ATTR_DATA netlink attribute whose readable size is nla_len() - sizeof(ncsi_pkt_hdr). The two length sources are never cross-checked: only nla_len() \u003E= sizeof(struct ncsi_pkt_hdr) is enforced.  With hdr-\u003Elength set larger than the attribute payload (up to 65535 against at most 2032 readable bytes), ncsi_cmd_handler_oem() copies past the end of the netlink attribute buffer with unsafe_memcpy(), leaking up to ~64KB of kernel heap memory into the transmitted NCSI command packet. The destination skb is sized by the declared payload, so the write side does not overflow - this is a pure OOB read / information leak, reachable with CAP_NET_ADMIN on systems with a registered NCSI device (e.g. OpenBMC on Aspeed BMC SoCs, where NET_NCSI=y is standard).  Reject commands whose declared payload extends past the end of the data attribute.  The issue was found by the autokbug dynamic kernel fuzzer at Tencent Yunding Lab.",
  "published": "2026-08-22T16:16:43Z",
  "severity": "Moderate",
  "cvss": 4.4,
  "epss": 0.00177,
  "epssPercentile": 0.07266,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74694",
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  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
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    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
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}