rustsec-2026-0184
Vulnerability from osv_rustsec
Published
2026-05-13 12:00
Modified
2026-06-17 13:50
Summary
Potential undefined behavior with Signature from a buffer-created BlameHunk
Details

When a Blame is created via Blame::blame_buffer(), and a BlameHunk is retrieved, the pointers to the original author, original committer, final author, and final committer may be null if unavailable. The corresponding BlameHunk methods then create Signatures based on null pointers; attempting to access the data of the Signatures leads to dereferencing null pointers.

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "categories": [],
        "cvss": null,
        "informational": "unsound"
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "git2",
        "purl": "pkg:cargo/git2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.21.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "When a `Blame` is created via `Blame::blame_buffer()`, and a `BlameHunk` is retrieved, the pointers to the original author, original committer, final author, and final committer may be null if unavailable. The corresponding `BlameHunk` methods then create `Signature`s based on null pointers; attempting to access the data of the `Signature`s leads to dereferencing null pointers.",
  "id": "RUSTSEC-2026-0184",
  "modified": "2026-06-17T13:50:20Z",
  "published": "2026-05-13T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/git2"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0184.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rust-lang/git2-rs/pull/1254"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "Potential undefined behavior with Signature from a buffer-created BlameHunk"
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Detection rules are retrieved from Rulezet.