ghsa-rxr4-x558-x7hw
Vulnerability from github
Published
2021-08-25 20:42
Modified
2023-06-13 20:58
Severity ?
9.8 (Critical) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
Double free in smallvec
Details

If an iterator passed to SmallVec::insert_many panicked in Iterator::next, destructors were run during unwinding while the vector was in an inconsistent state, possibly causing a double free (a destructor running on two copies of the same value).

This is fixed in smallvec 0.6.3 by ensuring that the vector's length is not updated to include moved items until they have been removed from their original positions. Items may now be leaked if Iterator::next panics, but they will not be dropped more than once.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "smallvec"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.3.2"
            },
            {
              "fixed": "0.6.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2018-20991"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-415"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-08-19T21:25:34Z",
    "nvd_published_at": null,
    "severity": "CRITICAL"
  },
  "details": "If an iterator passed to SmallVec::insert_many panicked in Iterator::next, destructors were run during unwinding while the vector was in an inconsistent state, possibly causing a double free (a destructor running on two copies of the same value).\n\nThis is fixed in smallvec 0.6.3 by ensuring that the vector\u0027s length is not updated to include moved items until they have been removed from their original positions. Items may now be leaked if Iterator::next panics, but they will not be dropped more than once.",
  "id": "GHSA-rxr4-x558-x7hw",
  "modified": "2023-06-13T20:58:32Z",
  "published": "2021-08-25T20:42:54Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-20991"
    },
    {
      "type": "WEB",
      "url": "https://github.com/servo/rust-smallvec/issues/96"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/servo/rust-smallvec"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2018-0003.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Double free in smallvec"
}


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