{
  "cveId": "CVE-2026-99192",
  "url": "https://patchblox.com/security/cve/CVE-2026-99192",
  "summary": "CVE-2026-99192 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-99192, released November 3, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "net: bcmgenet: unshare the skb before writing the control block",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  net: bcmgenet: unshare the skb before writing the control block  bcmgenet stores first_cb, last_cb and bytes_sent in the skb control block and reads them back on completion to free the skb and credit BQL. ether_setup() leaves IFF_TX_SKB_SHARING set, so the stack can resubmit a shared skb that is still in the ring. The next transmit overwrites last_cb, so the earlier slots complete without crediting their bytes and BQL stalls the queue until the watchdog resets it.  Unshare the skb before writing the control block.  Reproduce with pktgen in clone_skb mode, which hands the driver the same skb while earlier copies are still in the ring:    modprobe pktgen   pg=/proc/net/pktgen   echo \u0022add_device eth0\u0022 \u003E $pg/kpktgend_0   echo \u0022dst_mac AA:BB:CC:DD:EE:FF\u0022 \u003E $pg/eth0   echo \u0022dst 192.0.2.1\u0022 \u003E $pg/eth0   echo \u0022clone_skb 8\u0022 \u003E $pg/eth0   echo \u0022count 0\u0022 \u003E $pg/eth0   echo start \u003E $pg/pgctrl \u0026   sleep 5   echo stop \u003E $pg/pgctrl   wait   cat /sys/class/net/eth0/queues/tx-0/byte_queue_limits/inflight  inflight stays nonzero on the now idle queue. clone_skb 0 leaves it at zero.",
  "published": "2026-10-28T11:17:40Z",
  "severity": "Important",
  "cvss": 7.8,
  "epss": 0.00179,
  "epssPercentile": 0.07521,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-99192",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.115-2",
      "fix": "DEBIAN-CVE-2026-99192",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-99192",
      "released": "2026-11-03T18:58:21Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.13-1",
      "fix": "DEBIAN-CVE-2026-99192",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-99192",
      "released": "2026-11-03T18:58:21Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}