ghsa-2qj8-c2v4-6cg6
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: ethernet: ti: am65-cpsw: fix memleak in certain XDP cases

If the XDP program doesn't result in XDP_PASS then we leak the memory allocated by am65_cpsw_build_skb().

It is pointless to allocate SKB memory before running the XDP program as we would be wasting CPU cycles for cases other than XDP_PASS. Move the SKB allocation after evaluating the XDP program result.

This fixes the memleak. A performance boost is seen for XDP_DROP test.

XDP_DROP test: Before: 460256 rx/s 0 err/s After: 784130 rx/s 0 err/s

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{
  "affected": [],
  "aliases": [
    "CVE-2025-21788"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-27T03:15:19Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: ti: am65-cpsw: fix memleak in certain XDP cases\n\nIf the XDP program doesn\u0027t result in XDP_PASS then we leak the\nmemory allocated by am65_cpsw_build_skb().\n\nIt is pointless to allocate SKB memory before running the XDP\nprogram as we would be wasting CPU cycles for cases other than XDP_PASS.\nMove the SKB allocation after evaluating the XDP program result.\n\nThis fixes the memleak. A performance boost is seen for XDP_DROP test.\n\nXDP_DROP test:\nBefore: 460256 rx/s                  0 err/s\nAfter:  784130 rx/s                  0 err/s",
  "id": "GHSA-2qj8-c2v4-6cg6",
  "modified": "2025-02-27T03:34:06Z",
  "published": "2025-02-27T03:34:06Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21788"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1bba1d042107167164a0ae3a843fdf650ab005d7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5db843258de1e4e6b1ef1cbd1797923c9e3de548"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dc11f049612b9d926aca2e55f8dc9d82850d0da3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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