GHSA-6W2P-QXH2-6WC3

Vulnerability from github – Published: 2026-10-06 09:31 – Updated: 2026-10-06 09:31
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

net/packet: clear RX owner on VNET header error

Commit 61fad6816fc1 ("net/packet: tpacket_rcv: avoid a producer race condition") added rx_owner_map and made tpacket_rcv() claim a V1 or V2 ring slot before converting the virtio-net header. If the conversion fails, the drop path leaves the slot claimed.

With a one-frame TPACKET_V2 ring, an unsupported UDP GSO packet leaves the only slot unavailable, so the ring also drops the next valid packet.

Clear the ownership bit on this error path. TPACKET_V3 already clears its block state here.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98233"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-06T09:18:10Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/packet: clear RX owner on VNET header error\n\nCommit 61fad6816fc1 (\"net/packet: tpacket_rcv: avoid a producer race\ncondition\") added rx_owner_map and made tpacket_rcv() claim a V1 or V2\nring slot before converting the virtio-net header.  If the conversion\nfails, the drop path leaves the slot claimed.\n\nWith a one-frame TPACKET_V2 ring, an unsupported UDP GSO packet leaves\nthe only slot unavailable, so the ring also drops the next valid packet.\n\nClear the ownership bit on this error path.  TPACKET_V3 already clears\nits block state here.",
  "id": "GHSA-6w2p-qxh2-6wc3",
  "modified": "2026-10-06T09:31:31Z",
  "published": "2026-10-06T09:31:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98233"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/23cd30498891d29a69ec9b75bd92f8a0f21f1342"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2daa618e7ff19eefcbda281bc4c5998c4140f9cf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/33ff111d7ba3beb86e28938d6382bb5beabd865a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/49a48a5aaf85fe69d2dc3fb334b4854fadf44e39"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/693209a237fc548791cf402441db8b68d1da7d38"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/805edbdcb8681da5f7ee43b3c3c809f7a8c31208"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b8c0cb3069058c2d67b5c7c833b2833381ecffdc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bb10a0084c03a94364aeec542beddc5d49b59f59"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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