RUSTSEC-2026-0134
Unsound access to padding bytes while serializing date/time values using the Mysql backend
- Severity
- Not rated yet
- No source has published a CVSS score yet
- Exploit chance (EPSS)
- —
- No score published
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- —
- Not classified
- Fix
2.3.8- Upgrade diesel to this version or later
Description
Diesel relies on libmysqlclient for interacting with Mysql compatible databases. This library requires to provide date/time values according to the byte layout of their MYSQL_TIME type.
Diesel replicated this type as #[repr(C)] struct, populated all the fields of this struct and then casted this value to an array of bytes. As this cast exposes padding bytes contained in this struct, this is undefined behaviour.
This vulnerability affects any user serializing date/time values using the Mysql backend.
Mitigation
The preferred mitigation to the outlined problem is to update to Diesel version 2.3.8 or newer, which includes fixes for the problem.
Resolution
Diesel now manually serializes the relevant data without accessing the padding bytes.
Affected versions
crates.io
| Package | Vulnerable | Fixed in |
|---|---|---|
| diesel | >= 0.0.0-0, < 2.3.8 |
2.3.8 |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
diesel crates.io → 2.3.8
- cargo
cargo update -p diesel --precise 2.3.8
References
Advisories
Packages
Other links
Timeline
- Published
- Last updated by the source
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-ggxf-9f6j-w742 Diesel has possible use after free when deserializing a SQLite database via `SqliteConnection::deserialize_readonly_database` | Medium | Also affects diesel |
| RUSTSEC-2026-0135 Unsound transmute while debug/display printing batch Insert statements in Diesel's SQLite backend | Not rated yet | Also affects diesel |
| GHSA-m9p2-fxp5-v3fp Diesel: Command injection in Diesel's implementation of `COPY FROM`/`COPY TO` | Medium | Also affects diesel |
| GHSA-q8x8-jrhj-fh9p Diesel: Possible unaligned data access for implementations of `SqliteAggregate` | Medium | Also affects diesel |
| GHSA-h5x4-m2qf-r4f2 Diesel's SQLite backend has possible UTF-8 corruption | High | Also affects diesel |
| GHSA-wq9x-qwcq-mmgf Diesel vulnerable to Binary Protocol Misinterpretation caused by Truncating or Overflowing Casts | High | Also affects diesel |
| RUSTSEC-2021-0037 Fix a use-after-free bug in diesels Sqlite backend | Critical | Also affects diesel |
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