ghsa-r5gw-qwwg-wx9p
Vulnerability from github
Published
2025-02-27 03:34
Modified
2025-02-27 03:34
Details

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

net: ipv6: fix dst ref loops in rpl, seg6 and ioam6 lwtunnels

Some lwtunnels have a dst cache for post-transformation dst. If the packet destination did not change we may end up recording a reference to the lwtunnel in its own cache, and the lwtunnel state will never be freed.

Discovered by the ioam6.sh test, kmemleak was recently fixed to catch per-cpu memory leaks. I'm not sure if rpl and seg6 can actually hit this, but in principle I don't see why not.

Show details on source website


{
  "affected": [],
  "aliases": [
    "CVE-2025-21768"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-27T03:15:17Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ipv6: fix dst ref loops in rpl, seg6 and ioam6 lwtunnels\n\nSome lwtunnels have a dst cache for post-transformation dst.\nIf the packet destination did not change we may end up recording\na reference to the lwtunnel in its own cache, and the lwtunnel\nstate will never be freed.\n\nDiscovered by the ioam6.sh test, kmemleak was recently fixed\nto catch per-cpu memory leaks. I\u0027m not sure if rpl and seg6\ncan actually hit this, but in principle I don\u0027t see why not.",
  "id": "GHSA-r5gw-qwwg-wx9p",
  "modified": "2025-02-27T03:34:05Z",
  "published": "2025-02-27T03:34:05Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21768"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4c0f200c7d06fedddde82209c099014d63f4a6c0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5ab11a4e219e93b8b31a27f8ec98d42afadd8b7a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/92191dd1073088753821b862b791dcc83e558e07"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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