ghsa-7j34-4m8p-353w
Vulnerability from github
Published
2025-04-03 09:32
Modified
2025-04-10 18:32
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: Fix memleak of nhc_pcpu_rth_output in fib_check_nh_v6_gw().

fib_check_nh_v6_gw() expects that fib6_nh_init() cleans up everything when it fails.

Commit 7dd73168e273 ("ipv6: Always allocate pcpu memory in a fib6_nh") moved fib_nh_common_init() before alloc_percpu_gfp() within fib6_nh_init() but forgot to add cleanup for fib6_nh->nh_common.nhc_pcpu_rth_output in case it fails to allocate fib6_nh->rt6i_pcpu, resulting in memleak.

Let's call fib_nh_common_release() and clear nhc_pcpu_rth_output in the error path.

Note that we can remove the fib6_nh_release() call in nh_create_ipv6() later in net-next.git.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-22005"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-401"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-03T08:15:16Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: Fix memleak of nhc_pcpu_rth_output in fib_check_nh_v6_gw().\n\nfib_check_nh_v6_gw() expects that fib6_nh_init() cleans up everything\nwhen it fails.\n\nCommit 7dd73168e273 (\"ipv6: Always allocate pcpu memory in a fib6_nh\")\nmoved fib_nh_common_init() before alloc_percpu_gfp() within fib6_nh_init()\nbut forgot to add cleanup for fib6_nh-\u003enh_common.nhc_pcpu_rth_output in\ncase it fails to allocate fib6_nh-\u003ert6i_pcpu, resulting in memleak.\n\nLet\u0027s call fib_nh_common_release() and clear nhc_pcpu_rth_output in the\nerror path.\n\nNote that we can remove the fib6_nh_release() call in nh_create_ipv6()\nlater in net-next.git.",
  "id": "GHSA-7j34-4m8p-353w",
  "modified": "2025-04-10T18:32:02Z",
  "published": "2025-04-03T09:32:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22005"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/119dcafe36795a15ae53351cbbd6177aaf94ffef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/16267a5036173d0173377545b4b6021b081d0933"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1bd12dfc058e1e68759d313d7727d68dbc1b8964"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/29d91820184d5cbc70f3246d4911d96eaeb930d6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/596a883c4ce2d2e9c175f25b98fed3a1f33fea38"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/77c41cdbe6bce476e08d3251c0d501feaf10a9f3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9740890ee20e01f99ff1dde84c63dcf089fabb98"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d3d5b4b5ae263c3225db363ba08b937e2e2b0380"
    }
  ],
  "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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