PatchTheCVECVE-2020-35892: An issue was discovered in the simple-slab crate before 0.3.3 for Rust
CVE-2020-35892 is a critical-severity flaw (CVSS 9.1) affecting simple-slab. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
An issue was discovered in the simple-slab crate before 0.3.3 for Rust. index() allows an out-of-bounds read.
Why this priority
- Critical severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.1 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.5% (top 25%) |
| CISA exploited list | No |
| Weakness | CWE-125 |
| Published | 2020-12-31 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2020-35892?
simple-slab: upgrade to 0.3.3. Exact commands for each OS are on this page.
Is CVE-2020-35892 being exploited?
CVE-2020-35892 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2020-35892 affect?
CVE-2020-35892 affects simple-slab. Severity is critical (CVSS 9.1). An issue was discovered in the simple-slab crate before 0.3.3 for Rust. index() allows an out-of-bounds read.
How urgent is CVE-2020-35892?
Priority 56/100. Critical severity; Remotely exploitable, no login, no user action
Related CVEs
- CVE-2020-35893 HIGH 7.5 UPGRADE An issue was discovered in the simple-slab crate before 0.3.3 for Rust