Summary
Nervos CKB BlockTimeTooNew should not be considered as invalid block
Workarounds
Don't ban peer serving too-far-ahead block header.
Impact
Currently, when a node receives a block in future according to its local wall clock, it will mark the block as invalid and ban the peer.
If the header's timestamp is more than 15 seconds ahead of our current time. In that case, the header may become valid in the future, and we don't want to disconnect a peer merely for serving us one too-far-ahead block header, to prevent an attacker from splitting the network by mining a block right at the 15 seconds boundary.
Affected versions
Security releases
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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Upgrade to v0.33.1 or above.
Frequently Asked Questions
- What is GHSA-R9RV-9MH8-PXF4? GHSA-R9RV-9MH8-PXF4 is a medium-severity security vulnerability in ckb (rust), affecting versions <= 0.33.0. It is fixed in 0.33.1.
- Which versions of ckb are affected by GHSA-R9RV-9MH8-PXF4? ckb (rust) versions <= 0.33.0 is affected.
- Is there a fix for GHSA-R9RV-9MH8-PXF4? Yes. GHSA-R9RV-9MH8-PXF4 is fixed in 0.33.1. Upgrade to this version or later.
- Is GHSA-R9RV-9MH8-PXF4 exploitable, and should I be worried? Whether GHSA-R9RV-9MH8-PXF4 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-R9RV-9MH8-PXF4 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-R9RV-9MH8-PXF4? Upgrade
ckbto 0.33.1 or later.