In the standard library in Rust before 1.52.0, the Zip implementation calls…
Priority LOW 37CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.
Summary
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.
Why it matters now
EPSS 0.01997 80th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Red Hat: 2 advisories
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:rust-lang:rust:*:*:*:*:*:*:*:* | before 1.52.0 | Vulnerable | rust-lang |
| cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* | 32 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 33 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | 34 | Vulnerable | Fedoraproject |
- cpe:2.3:a:rust-lang:rust:*:*:*:*:*:*:*:* Versions before 1.52.0 Vulnerable ·rust-lang
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
Remediation
Red Hat 2 advisories
- RHSA-2021:3063 Released 2021-08-10 · Red Hat rating Moderaterust-toolset:rhel8 security, bug fix, and enhancement update
- Red Hat Enterprise Linux AppStream (v. 8) cargo-1.52.1-1.module+el8.4.0+11282+0729bac9.aarch64::rust-toolset:rhel8, cargo-1.52.1-1.module+el8.4.0+11282+0729bac9.ppc64le::rust-toolset:rhel8, cargo-1.52.1-1.module+el8.4.0+11282+0729bac9.s390x::rust-toolset:rhel8 +40
- RHSA-2021:3042 Released 2021-08-10 · Red Hat rating Moderaterust-toolset-1.52 and rust-toolset-1.52-rust security and enhancement update
- Red Hat Developer Tools for Red Hat Enterprise Linux Server (v. 7) rust-toolset-1.52-1.52.1-1.el7_9, rust-toolset-1.52-build-1.52.1-1.el7_9, rust-toolset-1.52-cargo-1.52.1-2.el7_9 +13
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Developer Tools for Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2021:3042 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2021:3063 |
Not affected: 1 product
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2021-28878
- 2026-10-03 Alias added: GHSA-p39x-6cjx-6mpm
References
Sources
- CVE-2021-28878 · CVE Program
- CVE-2021-28878 · NVD
- FIRST EPSS
- GHSA-p39x-6cjx-6mpm · GitHub Advisory Database · CC BY 4.0
- CVE-2021-28878 · Red Hat security data · CC BY 4.0
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