PatchTheCVECVE-2021-28027: An issue was discovered in the bam crate before 0.1.3 for Rust
CVE-2021-28027 is a critical-severity flaw (CVSS 9.8) affecting bam. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
An issue was discovered in the bam crate before 0.1.3 for Rust. There is an integer underflow and out-of-bounds write during the loading of a bgzip block.
Why this priority
- Critical severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.3% (top 30%) |
| CISA exploited list | No |
| Weakness | CWE-191 |
| Published | 2021-03-05 |
| 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-2021-28027?
bam: upgrade to 0.1.3. Exact commands for each OS are on this page.
Is CVE-2021-28027 being exploited?
CVE-2021-28027 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-2021-28027 affect?
CVE-2021-28027 affects bam. Severity is critical (CVSS 9.8). An issue was discovered in the bam crate before 0.1.3 for Rust. There is an integer underflow and out-of-bounds write during the loading of a bgzip block.
How urgent is CVE-2021-28027?
Priority 57/100. Critical severity; Remotely exploitable, no login, no user action