CVE-2026-72703 Detail
Received
This CVE record has recently been published to the CVE List and has been included within the NVD dataset. DescriptionThe guard checker in Rocq Prover treats a parameter of a nested mutual fixpoint as uniform without examining calls between the different bodies of that fixpoint. find_uniform_parameters in kernel/inductive.ml inspects only self-recursive calls, so when no body calls itself the function concludes that every parameter is uniform. A parameter that grows through a cross-call from one body to another therefore keeps the subterm specification it inherited from the enclosing fixpoint, and a recursive call guarded by that specification is accepted although the argument is not structurally smaller. A non-terminating definition is admitted as structurally decreasing, which yields a term whose value equals its own successor and so a proof of False, from which any proposition follows. The proof requires no axioms, plugins or unsafe flags and Print Assumptions reports it as closed under the global context. Introduced in Coq 8.20 and fixed in Rocq 9.2.0. Metrics
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CVSS 4.0 Severity and Vector Strings:
CNA: VulnCheck
CVSS-B 6.8 MEDIUM
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
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Quick InfoCVE Dictionary Entry:CVE-2026-72703 NVD Published Date: 08/24/2026 NVD Last Modified: 08/24/2026 Source: VulnCheck |
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