What is GHSA-3FG9-HCQ5-VXRC?

GHSA-3FG9-HCQ5-VXRC is a medium-severity use after free vulnerability in iana-time-zone (rust), affecting versions >= 0.1.43, < 0.1.45. It is fixed in 0.1.45. Memory is accessed after it has been freed, leading to undefined behavior in native code.

Which versions of iana-time-zone are affected by GHSA-3FG9-HCQ5-VXRC?

iana-time-zone (rust) versions >= 0.1.43, < 0.1.45 is affected.

Is there a fix for GHSA-3FG9-HCQ5-VXRC?

Yes. GHSA-3FG9-HCQ5-VXRC is fixed in 0.1.45. Upgrade to this version or later.

Is GHSA-3FG9-HCQ5-VXRC exploitable, and should I be worried?

Whether GHSA-3FG9-HCQ5-VXRC is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

What actually determines whether GHSA-3FG9-HCQ5-VXRC is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

GHSA-3FG9-HCQ5-VXRC in iana-time-zone

Q: Which versions of iana-time-zone are affected by GHSA-3FG9-HCQ5-VXRC?

iana-time-zone (rust) versions >= 0.1.43, < 0.1.45 is affected.

Q: Is there a fix for GHSA-3FG9-HCQ5-VXRC?

Yes. GHSA-3FG9-HCQ5-VXRC is fixed in 0.1.45. Upgrade to this version or later.

Q: Is GHSA-3FG9-HCQ5-VXRC exploitable, and should I be worried?

Whether GHSA-3FG9-HCQ5-VXRC is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

Q: What actually determines whether GHSA-3FG9-HCQ5-VXRC is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

Q: How do I fix GHSA-3FG9-HCQ5-VXRC?

Upgrade iana-time-zone to 0.1.45 or later.

Summary

iana-time-zone vulnerable to use after free in MacOS / iOS implementation

In iana-time-zone v0.1.43 a use-after-free bug in the MacOS / iOS implementation was introduced.

The copied system time zone was released before its name was copied.
If the system time zone was changed between the call of CFRelease and str::to_owned(),
random memory would be copied.

Impact

Memory is accessed after it has been freed, leading to undefined behavior in native code. Typical impact: memory corruption, crash, or potential code execution.

Affected versions

iana-time-zone (>= 0.1.43, < 0.1.45)

Security releases

iana-time-zone → 0.1.45 (rust)

Kodem intelligence

Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.

Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.

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Remediation advice

Upgrade iana-time-zone to 0.1.45 or later to resolve this vulnerability.

Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.

Frequently Asked Questions

What is GHSA-3FG9-HCQ5-VXRC? GHSA-3FG9-HCQ5-VXRC is a medium-severity use after free vulnerability in iana-time-zone (rust), affecting versions >= 0.1.43, < 0.1.45. It is fixed in 0.1.45. Memory is accessed after it has been freed, leading to undefined behavior in native code.
Which versions of iana-time-zone are affected by GHSA-3FG9-HCQ5-VXRC? iana-time-zone (rust) versions >= 0.1.43, < 0.1.45 is affected.
Is there a fix for GHSA-3FG9-HCQ5-VXRC? Yes. GHSA-3FG9-HCQ5-VXRC is fixed in 0.1.45. Upgrade to this version or later.
Is GHSA-3FG9-HCQ5-VXRC exploitable, and should I be worried? Whether GHSA-3FG9-HCQ5-VXRC is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
What actually determines whether GHSA-3FG9-HCQ5-VXRC is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
How do I fix GHSA-3FG9-HCQ5-VXRC? Upgrade iana-time-zone to 0.1.45 or later.