rustsec-2025-0126
Vulnerability from osv_rustsec
Published
2025-10-18 12:00
Modified
2025-11-27 21:53
Summary
Heap-buffer-overflow in nftnl::Batch::with_page_size (nftnl-rs)
Details

A heap-buffer-overflow vulnerability exists in the Rust wrapper for libnftnl, triggered via the nftnl::Batch::with_page_size constructor. When a small or malformed page size is provided, the underlying C code allocates an insufficient buffer, leading to out-of-bounds writes during batch initialization.

The flaw was fixed in commit 94a286f by adding an overflow check:

batch_page_size
    .checked_add(crate::nft_nlmsg_maxsize())
    .expect("batch_page_size is too large and would overflow");

Mitigation

Upgrade to version 0.9.0 or later, which aborts instead.

To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "memory-corruption"
        ],
        "cvss": null,
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "nftnl",
        "purl": "pkg:cargo/nftnl"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.9.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "GHSA-2fjw-whxm-9v4q"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "A heap-buffer-overflow vulnerability exists in the Rust wrapper for libnftnl, triggered via the nftnl::Batch::with_page_size constructor. When a small or malformed page size is provided, the underlying C code allocates an insufficient buffer, leading to out-of-bounds writes during batch initialization.\n\nThe flaw was fixed in commit 94a286f by adding an overflow check:\n```Rust\nbatch_page_size\n    .checked_add(crate::nft_nlmsg_maxsize())\n    .expect(\"batch_page_size is too large and would overflow\");\n```\n\n## Mitigation\n\nUpgrade to version `0.9.0` or later, which aborts instead.",
  "id": "RUSTSEC-2025-0126",
  "modified": "2025-11-27T21:53:33Z",
  "published": "2025-10-18T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/nftnl"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2025-0126.html"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/mullvad/nftnl-rs/issues/76#issue-3528876468"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "Heap-buffer-overflow in nftnl::Batch::with_page_size (nftnl-rs)"
}


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