{
  "cveId": "CVE-2026-98592",
  "url": "https://patchblox.com/security/cve/CVE-2026-98592",
  "summary": "CVE-2026-98592 is fixed in linux on 1 platform by DEBIAN-CVE-2026-98592 (version 7.2.9-1), released October 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "net: spacemit: clear TX descriptor on fragment mapping failure",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  net: spacemit: clear TX descriptor on fragment mapping failure  emac_tx_mem_map() writes TX_DESC_0_OWN into the ring descriptor for every slot beyond old_head as soon as that slot\u0027s memset()\u0027d local copy is committed with \u0022*tx_desc_addr = tx_desc\u0022, i.e. before the buffers for that slot have necessarily all been mapped successfully. If emac_tx_map_frag() then fails on a later fragment, the err_free_skb path calls emac_free_tx_buf() to unmap and drop the skb, but leaves the already-written descriptor memory untouched, and tx_ring-\u003Ehead is never advanced past old_head (the \u0022tx_ring-\u003Ehead = head\u0022 store is skipped by the goto).  So a slot between old_head and the rolled-back head can be left with TX_DESC_0_OWN set and buffer_addr_{1,2} pointing at DMA mappings that emac_free_tx_buf() just tore down, while software considers that slot free again. The next successful emac_tx_mem_map() call only rebuilds old_head itself; if the DMA engine auto-advances into the following descriptor once it finishes old_head\u0027s packet, it will fetch that stale, already-unmapped address.  emac_tx_clean_desc() already treats emac_free_tx_buf() and clearing the descriptor as a pair when reclaiming completed descriptors; do the same in the mapping failure path.",
  "published": "2026-10-18T16:17:11Z",
  "severity": "",
  "epss": 0.00198,
  "epssPercentile": 0.09633,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-98592",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.9-1",
      "fix": "DEBIAN-CVE-2026-98592",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98592",
      "released": "2026-10-19T16:27:52Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}