ghsa-49cj-cqm8-6m92
Vulnerability from github
Published
2024-05-01 15:30
Modified
2025-09-18 18:30
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

ipv6: mcast: remove one synchronize_net() barrier in ipv6_mc_down()

As discussed in the past (commit 2d3916f31891 ("ipv6: fix skb drops in igmp6_event_query() and igmp6_event_report()")) I think the synchronize_net() call in ipv6_mc_down() is not needed.

Under load, synchronize_net() can last between 200 usec and 5 ms.

KASAN seems to agree as well.

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2024-27390"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-01T13:15:51Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: mcast: remove one synchronize_net() barrier in ipv6_mc_down()\n\nAs discussed in the past (commit 2d3916f31891 (\"ipv6: fix skb drops\nin igmp6_event_query() and igmp6_event_report()\")) I think the\nsynchronize_net() call in ipv6_mc_down() is not needed.\n\nUnder load, synchronize_net() can last between 200 usec and 5 ms.\n\nKASAN seems to agree as well.",
  "id": "GHSA-49cj-cqm8-6m92",
  "modified": "2025-09-18T18:30:21Z",
  "published": "2024-05-01T15:30:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-27390"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/17ef8efc00b34918b966388b2af0993811895a8c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/26d4bac55750d535f1f0b8790dc26daf6089e373"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5da9a218340a2bc804dc4327e5804392e24a0b88"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7eb06ee5921189812e6b4bfe7b0f1e878be16df7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9d159d6637ccce25f879d662a480541ef4ba3a50"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a03ede2282ebbd181bd6f5c38cbfcb5765afcd04"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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