Which versions of grcov are affected by GHSA-QM2P-4W45-V2VR?

grcov (rust) versions < 0.8.20 is affected.

Is there a fix for GHSA-QM2P-4W45-V2VR?

Yes. GHSA-QM2P-4W45-V2VR is fixed in 0.8.20. Upgrade to this version or later.

Is GHSA-QM2P-4W45-V2VR exploitable, and should I be worried?

Whether GHSA-QM2P-4W45-V2VR 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-QM2P-4W45-V2VR 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-QM2P-4W45-V2VR in grcov

Q: What is GHSA-QM2P-4W45-V2VR?

GHSA-QM2P-4W45-V2VR is a medium-severity out-of-bounds write vulnerability in grcov (rust), affecting versions < 0.8.20. It is fixed in 0.8.20. A write operation targets a memory location beyond the intended buffer boundary.

Q: Is there a fix for GHSA-QM2P-4W45-V2VR?

Yes. GHSA-QM2P-4W45-V2VR is fixed in 0.8.20. Upgrade to this version or later.

Q: Is GHSA-QM2P-4W45-V2VR exploitable, and should I be worried?

Whether GHSA-QM2P-4W45-V2VR 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-QM2P-4W45-V2VR 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-QM2P-4W45-V2VR?

Upgrade grcov to 0.8.20 or later.

GHSA-QM2P-4W45-V2VR

GHSA-QM2P-4W45-V2VR is a medium-severity out-of-bounds write vulnerability in grcov (rust), affecting versions < 0.8.20. It is fixed in 0.8.20.

Does this CVE actually affect you?

Kodem shows which CVEs are reachable and running in your applications, so you fix what's exploitable, not just what's listed.

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Runtime intelligence, not another scanner.

Summary

grcov has an out of bounds write triggered by crafted coverage data

Function grcov::covdir::get_coverage uses the unsafe function get_unchecked_mut without validating that the index is in bounds.

This results in memory corruption, and could potentially allow arbitrary code execution provided that an attacker can feed the tool crafted coverage data.

Impact

A write operation targets a memory location beyond the intended buffer boundary. Typical impact: memory corruption, crash, or arbitrary code execution.

Affected versions

grcov (< 0.8.20)

Security releases

grcov → 0.8.20 (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 grcov to 0.8.20 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-QM2P-4W45-V2VR? GHSA-QM2P-4W45-V2VR is a medium-severity out-of-bounds write vulnerability in grcov (rust), affecting versions < 0.8.20. It is fixed in 0.8.20. A write operation targets a memory location beyond the intended buffer boundary.
Which versions of grcov are affected by GHSA-QM2P-4W45-V2VR? grcov (rust) versions < 0.8.20 is affected.
Is there a fix for GHSA-QM2P-4W45-V2VR? Yes. GHSA-QM2P-4W45-V2VR is fixed in 0.8.20. Upgrade to this version or later.
Is GHSA-QM2P-4W45-V2VR exploitable, and should I be worried? Whether GHSA-QM2P-4W45-V2VR 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-QM2P-4W45-V2VR 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-QM2P-4W45-V2VR? Upgrade grcov to 0.8.20 or later.