Rocq Prover does not restore the universe graph's copy of the universe checking flag when a module that locally disabled the check is closed. Local Unset Universe Checking inside a module is expected to last only until the module ends, and the global flag is restored, but the universe graph keeps its own copy which is left disabled. The two views then disagree: Test Universe Checking reports the check as enabled while the kernel continues to accept universe-inconsistent terms. With the constraint between two universes no longer enforced, Hurkens' paradox applies and yields a proof of False, from which any proposition follows. The proof uses no axioms, plugins or unsafe features once the module has closed, and Print Assumptions reports it as closed under the global context, so neither the assumption audit nor the flag query reflects the actual kernel state. No fix is available.
Metrics
Affected Vendors & Products
References
History
Fri, 28 Aug 2026 21:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Rocq-prover
Rocq-prover rocq |
|
| Vendors & Products |
Rocq-prover
Rocq-prover rocq |
Tue, 25 Aug 2026 18:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Mon, 24 Aug 2026 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Rocq Prover does not restore the universe graph's copy of the universe checking flag when a module that locally disabled the check is closed. Local Unset Universe Checking inside a module is expected to last only until the module ends, and the global flag is restored, but the universe graph keeps its own copy which is left disabled. The two views then disagree: Test Universe Checking reports the check as enabled while the kernel continues to accept universe-inconsistent terms. With the constraint between two universes no longer enforced, Hurkens' paradox applies and yields a proof of False, from which any proposition follows. The proof uses no axioms, plugins or unsafe features once the module has closed, and Print Assumptions reports it as closed under the global context, so neither the assumption audit nor the flag query reflects the actual kernel state. No fix is available. | |
| Title | Rocq Prover through 9.2.0 Universe Checking State Desynchronised After Module Close | |
| Weaknesses | CWE-459 | |
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-08-24T20:08:33.917Z
Updated: 2026-08-25T17:41:24.594Z
Reserved: 2026-08-10T13:02:52.001Z
Link: CVE-2026-72714
Updated: 2026-08-25T17:41:00.810Z
Status : Received
Published: 2026-08-24T20:17:18.810
Modified: 2026-08-25T18:18:02.633
Link: CVE-2026-72714
No data.