{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "bfec6d7f2001c7470c3cd261ae65a3ba8737f226"
            },
            {
              "fixed": "ca9986cc824f2feb79b4a83e5f6f4c24c2140448"
            },
            {
              "fixed": "3001a103a367c6051c43aff363b6979c10e65347"
            },
            {
              "fixed": "2d14720beb58870b15a52b236c3ab0be0e06e915"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.18.0"
            },
            {
              "fixed": "6.18.55"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98592.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: spacemit: clear TX descriptor on fragment mapping failure\n\nemac_tx_mem_map() writes TX_DESC_0_OWN into the ring descriptor for\nevery slot beyond old_head as soon as that slot's memset()'d local\ncopy is committed with \"*tx_desc_addr = tx_desc\", i.e. before the\nbuffers for that slot have necessarily all been mapped successfully.\nIf emac_tx_map_frag() then fails on a later fragment, the err_free_skb\npath calls emac_free_tx_buf() to unmap and drop the skb, but leaves\nthe already-written descriptor memory untouched, and tx_ring-\u003ehead is\nnever advanced past old_head (the \"tx_ring-\u003ehead = head\" store is\nskipped by the goto).\n\nSo a slot between old_head and the rolled-back head can be left with\nTX_DESC_0_OWN set and buffer_addr_{1,2} pointing at DMA mappings that\nemac_free_tx_buf() just tore down, while software considers that slot\nfree again. The next successful emac_tx_mem_map() call only rebuilds\nold_head itself; if the DMA engine auto-advances into the following\ndescriptor once it finishes old_head's packet, it will fetch that\nstale, already-unmapped address.\n\nemac_tx_clean_desc() already treats emac_free_tx_buf() and clearing\nthe descriptor as a pair when reclaiming completed descriptors; do\nthe same in the mapping failure path.",
  "id": "CVE-2026-98592",
  "modified": "2026-10-20T02:30:51.887585279Z",
  "published": "2026-10-18T15:19:04.373Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2d14720beb58870b15a52b236c3ab0be0e06e915"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3001a103a367c6051c43aff363b6979c10e65347"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ca9986cc824f2feb79b4a83e5f6f4c24c2140448"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98592.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98592"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "net: spacemit: clear TX descriptor on fragment mapping failure"
}