ghsa-6v4x-gf5x-r6w5
Vulnerability from github
Published
2025-10-04 18:31
Modified
2025-10-04 18:31
Details

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

ip_vti: fix potential slab-use-after-free in decode_session6

When ip_vti device is set to the qdisc of the sfb type, the cb field of the sent skb may be modified during enqueuing. Then, slab-use-after-free may occur when ip_vti device sends IPv6 packets. As commit f855691975bb ("xfrm6: Fix the nexthdr offset in _decode_session6.") showed, xfrm_decode_session was originally intended only for the receive path. IP6CB(skb)->nhoff is not set during transmission. Therefore, set the cb field in the skb to 0 before sending packets.

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{
  "affected": [],
  "aliases": [
    "CVE-2023-53559"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-04T16:15:51Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nip_vti: fix potential slab-use-after-free in decode_session6\n\nWhen ip_vti device is set to the qdisc of the sfb type, the cb field\nof the sent skb may be modified during enqueuing. Then,\nslab-use-after-free may occur when ip_vti device sends IPv6 packets.\nAs commit f855691975bb (\"xfrm6: Fix the nexthdr offset in\n_decode_session6.\") showed, xfrm_decode_session was originally intended\nonly for the receive path. IP6CB(skb)-\u003enhoff is not set during\ntransmission. Therefore, set the cb field in the skb to 0 before\nsending packets.",
  "id": "GHSA-6v4x-gf5x-r6w5",
  "modified": "2025-10-04T18:31:15Z",
  "published": "2025-10-04T18:31:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53559"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0b4d69539fdea138af2befe08893850c89248068"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2b05bf5dc437f7891dd409a3eaf5058459391c7a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6018a266279b1a75143c7c0804dd08a5fc4c3e0b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/78e397a43e1c47321a4679cc49a6c4530bf820b9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7dfe23659f3677c08a60a0056cda2d91a79c15ca"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/82fb41c5de243e7dfa90f32ca58e35adaff56c1d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d34c30442d5e53a33cde79ca163320dbe2432cbd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e1e04cc2ef2c0c0866c19f5627149a76c2baae32"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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