{
  "schema_version": "1.4.0",
  "id": "GHSA-xw5j-gv2g-mjm2",
  "modified": "2023-02-14T21:53:37Z",
  "published": "2023-02-14T21:53:37Z",
  "aliases": [],
  "summary": "Miscompilation in cortex-m-rt 0.7.1 and 0.7.2",
  "details": "Version 0.7.1 of the `cortex-m-rt` crate introduced a regression causing the stack to NOT be eight-byte aligned prior to calling `main` (or any other specified entrypoint), violating the [stack ABI of AAPCS32], the default ABI used by all Cortex-M targets. This regression is also present in version 0.7.2 of the `cortex-m-rt` crate.\n\nThis regression can cause certain compiler optimizations (which assume the eight-byte alignment) to produce incorrect behavior at runtime. This incorrect behavior has been [observed in real-world applications].\n\n**It is advised that ALL users of `v0.7.1` and `v0.7.2` of the `cortex-m-rt` crate update to the latest version (`v0.7.3`), AS SOON AS POSSIBLE.** Users of `v0.7.0` and prior versions of `cortex-m-rt` are not affected by this regression.\n\nIt will be necessary to rebuild all affected firmware binaries, and flash or deploy the new firmware binaries to affected devices.\n\n[stack ABI of AAPCS32]: https://github.com/ARM-software/abi-aa/blob/edd7460d87493fff124b8b5713acf71ffc06ee91/aapcs32/aapcs32.rst#6212stack-constraints-at-a-public-interface\n[observed in real-world applications]: https://github.com/peter9477/test2\n",
  "severity": [],
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "cortex-m-rt"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0.7.0"
            },
            {
              "fixed": "0.7.3"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://github.com/rust-embedded/cortex-m"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rust-embedded/cortex-m/discussions/469"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2023-0014.html"
    }
  ],
  "database_specific": {
    "cwe_ids": [],
    "severity": "MODERATE",
    "github_reviewed": true,
    "github_reviewed_at": "2023-02-14T21:53:37Z",
    "nvd_published_at": null
  }
}