PatchTheCVECVE-2022-21211: This affects all versions of package posix
CVE-2022-21211 is a medium-severity flaw (CVSS 5.9) affecting posix. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
This affects all versions of package posix. When invoking the toString method, it will fallback to 0x0 value, as the value of toString is not invokable (not a function), and then it will crash with type-check.
Why this priority
- Public exploit reference
- Remotely exploitable, no login, no user action
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 5.9 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.0% (top 36%) |
| CISA exploited list | No |
| Weakness | CWE-252 |
| Published | 2022-06-10 |
| 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-2022-21211?
posix: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2022-21211 being exploited?
CVE-2022-21211 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-2022-21211 affect?
CVE-2022-21211 affects posix. Severity is medium (CVSS 5.9). This affects all versions of package posix. When invoking the toString method, it will fallback to 0x0 value, as the value of toString is not invokable (not a function), and then it will crash with type-check.
How urgent is CVE-2022-21211?
Priority 47/100. Public exploit reference; Remotely exploitable, no login, no user action