GHSA-2FJW-WHXM-9V4Q

Vulnerability from github – Published: 2025-11-25 23:18 – Updated: 2025-12-01 16:04
VLAI?
Summary
libnftnl has Heap-based 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");
Severity ?
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.8.0"
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "nftnl"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.9.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-122"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-11-25T23:18:37Z",
    "nvd_published_at": null,
    "severity": "CRITICAL"
  },
  "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```",
  "id": "GHSA-2fjw-whxm-9v4q",
  "modified": "2025-12-01T16:04:47Z",
  "published": "2025-11-25T23:18:37Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/mullvad/nftnl-rs/issues/76#issue-3528876468"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mullvad/nftnl-rs/commit/94a286f87e88f431913d19668246de9006790125"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/mullvad/nftnl-rs"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2025-0126.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "libnftnl has Heap-based Buffer Overflow in nftnl::Batch::with_page_size (nftnl-rs)"
}


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