CVE-2020-36323
Publication date 14 April 2021
Last updated 26 August 2025
Ubuntu priority
Description
In the standard library in Rust before 1.52.0, there is an optimization for joining strings that can cause uninitialized bytes to be exposed (or the program to crash) if the borrowed string changes after its length is checked.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| rustc | 25.10 questing | Not in release |
| 24.04 LTS noble |
Not affected
|
|
| 22.04 LTS jammy |
Fixed 1.53.0+dfsg1+llvm-4ubuntu1
|
|
| 20.04 LTS focal |
Fixed 1.53.0+dfsg1+llvm-4ubuntu1~20.04.1
|
|
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Vulnerable
|
|
| 14.04 LTS trusty |
Vulnerable
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
8.2 · High
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H |