CVE-2021-28878
Publication date 11 April 2021
Last updated 26 August 2025
Ubuntu priority
Description
In the standard library in Rust before 1.52.0, the Zip implementation calls __iterator_get_unchecked() more than once for the same index (under certain conditions) when next_back() and next() are used together. This bug could lead to a memory safety violation due to an unmet safety requirement for the TrustedRandomAccess trait.
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 |
7.5 · High
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |