CVE-2021-28878

HIGH

Rust < 1.52.0 - Memory Safety Violation via Zip Iterator next_back() and next()

Title source: llm

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.

References (6)

Core 6

Core References

Mailing List, Third Party Advisory vendor-advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CZ337CM4GFJLRDFVQCGC7J25V65JXOG5/

Mailing List, Third Party Advisory vendor-advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZG65GUW6Z2CYOQHF7T3TB5CZKIX6ZJE/

Mailing List, Third Party Advisory vendor-advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TFUO3URYCO73D2Q4WYJBWAMJWGGVXQO4/

Third Party Advisory vendor-advisory

https://security.gentoo.org/glsa/202210-09

Exploit, Issue Tracking, Third Party Advisory

https://github.com/rust-lang/rust/issues/82291

Patch, Third Party Advisory

https://github.com/rust-lang/rust/pull/82292

Scores

CVSS v3 7.5

EPSS 0.0200

EPSS Percentile 78.2%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE

CWE-119

Status published

Products (4)

fedoraproject/fedora 32

fedoraproject/fedora 33

fedoraproject/fedora 34

rust-lang/rust < 1.52.0

Published Apr 11, 2021

Tracked Since Feb 18, 2026