Bug 2523137 - CVE-2020-37268 coq: Coq and Rocq Provers: Logical inconsistency bypass via Print Assumptions omission [fedora-all]
Summary: CVE-2020-37268 coq: Coq and Rocq Provers: Logical inconsistency bypass via Pr...
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: coq
Version: rawhide
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Jerry James
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["e353cd6f-10bb-465a-84b5-7...
Depends On:
Blocks: CVE-2020-37268
TreeView+ depends on / blocked
 
Reported: 2026-08-24 20:51 UTC by Vladimir Vasilev
Modified: 2026-08-24 20:51 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:


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Description Vladimir Vasilev 2026-08-24 20:51:38 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

Print Assumptions does not report that a definition was produced while universe checking was disabled when that definition reaches the caller through Parameter Inline in a module type. Applying a functor inlines the body of the parameter, and the inlining drops the record that the term was built under Unset Universe Checking, so the resulting constant carries no trace of the unsafe operation. A module implementation can therefore prove False using a universe inconsistency, expose it through an inlined parameter, and have Print Assumptions report the dependent proof as closed under the global context. Because Print Assumptions is the in-process audit used to confirm that a development rests on no unexpected assumptions, a dependency built this way passes that audit while proving arbitrary propositions. The standalone checker coqchk does reject the resulting compiled file. The project records this in dev/doc/critical-bugs.md under non-fixed bugs and rates the risk as moderate when coqchk is not used.


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