Summary
libnftnl has Heap-based Buffer Overflow in nftnl::Batch::withpagesize (nftnl-rs)
A heap-buffer-overflow vulnerability exists in the Rust wrapper for libnftnl, triggered via the nftnl::Batch::with_page_size constructor. When a small or malformed page size is provided, the underlying C code allocates an insufficient buffer, leading to out-of-bounds writes during batch initialization.
The flaw was fixed in commit 94a286f by adding an overflow check:
batch_page_size
.checked_add(crate::nft_nlmsg_maxsize())
.expect("batch_page_size is too large and would overflow");
Impact
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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Frequently Asked Questions
- What is GHSA-2FJW-WHXM-9V4Q? GHSA-2FJW-WHXM-9V4Q is a critical-severity security vulnerability in nftnl (rust), affecting versions <= 0.8.0. It is fixed in 0.9.0.
- Which versions of nftnl are affected by GHSA-2FJW-WHXM-9V4Q? nftnl (rust) versions <= 0.8.0 is affected.
- Is there a fix for GHSA-2FJW-WHXM-9V4Q? Yes. GHSA-2FJW-WHXM-9V4Q is fixed in 0.9.0. Upgrade to this version or later.
- Is GHSA-2FJW-WHXM-9V4Q exploitable, and should I be worried? Whether GHSA-2FJW-WHXM-9V4Q 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-2FJW-WHXM-9V4Q 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-2FJW-WHXM-9V4Q? Upgrade
nftnlto 0.9.0 or later.