GHSA-XCPM-76HF-C9CC
Vulnerability from github – Published: 2025-10-22 16:35 – Updated: 2025-10-22 16:35The safe function any_as_u8_slice can create byte slices that reference uninitialized memory when used with types containing padding bytes.
The function uses slice::from_raw_parts to create a &[u8] covering the entire size of a type, including padding bytes. According to Rust's documentation, from_raw_parts requires all bytes to be properly initialized, but padding bytes in structs are not guaranteed to be initialized. This violates the safety contract and causes undefined behavior.
{
"affected": [
{
"package": {
"ecosystem": "crates.io",
"name": "borrowck_sacrifices"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.2.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-824"
],
"github_reviewed": true,
"github_reviewed_at": "2025-10-22T16:35:08Z",
"nvd_published_at": null,
"severity": "LOW"
},
"details": "The safe function `any_as_u8_slice` can create byte slices that reference uninitialized memory when used with types containing padding bytes.\n\nThe function uses `slice::from_raw_parts` to create a `\u0026[u8]` covering the entire size of a type, including padding bytes. According to Rust\u0027s documentation, `from_raw_parts` requires all bytes to be properly initialized, but padding bytes in structs are not guaranteed to be initialized. This violates the safety contract and causes undefined behavior.",
"id": "GHSA-xcpm-76hf-c9cc",
"modified": "2025-10-22T16:35:08Z",
"published": "2025-10-22T16:35:08Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/alexpyattaev/borrowck_sacrifices/issues/1"
},
{
"type": "WEB",
"url": "https://github.com/alexpyattaev/borrowck_sacrifices/commit/1bdaa14da68a6e8207f9e81359116f53139800f2"
},
{
"type": "PACKAGE",
"url": "https://github.com/alexpyattaev/borrowck_sacrifices"
},
{
"type": "WEB",
"url": "https://rustsec.org/advisories/RUSTSEC-2025-0107.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
"type": "CVSS_V4"
}
],
"summary": "Borrowck Scarifices exposes uninitialized memory in any_as_u8_slice"
}
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