https://feed.craftedsignal.io/tags/rocq/Trending threats, MITRE ATT&CK coverage, and detection metadata. Fed continuously.Hugoenhello@craftedsignal.iohello@craftedsignal.ioMon, 26 Oct 2026 04:24:18 +0000https://feed.craftedsignal.io/favicon-32x32.pnghttps://feed.craftedsignal.io/3232https://feed.craftedsignal.io/favicon.svghttps://feed.craftedsignal.io/briefs/2026-10-rocq-guard-checker-vulnerability/Mon, 26 Oct 2026 04:24:18 +0000hello@craftedsignal.iohttps://feed.craftedsignal.io/briefs/2026-10-rocq-guard-checker-vulnerability/A logic flaw in the Rocq kernel guard checker permits the construction of false proofs by failing to track recursive calls in fixpoints, undermining the integrity of formal verification.The Rocq (formerly Coq) kernel contains a soundness vulnerability in its guard checker, identified as CVE-2026-72705. The flaw occurs because the guard checker fails to correctly track recursive calls made through a fixpoint's own arguments. This allows for the construction of proofs that appear valid but conclude false propositions, such as 0 = 1, without the use of axioms, tactics, plugins, or unsafe flags. The system reports these malformed proofs as closed under the global context.

Impact

The vulnerability compromises the integrity of formally verified proofs generated by the Rocq Prover. If an attacker produces a false proof in a system relying on Rocq for verification, the security or logic properties guaranteed by that proof are invalidated.

Recommendation

• Identify all projects or systems utilizing the Rocq Prover to generate formal proofs.
• Monitor official Rocq development channels for the release of a patched version.
• Review critical proofs that were generated using affected versions of the Rocq kernel to verify they do not rely on the identified guard checker flaw.

]]>mediumadvisoryvulnerabilityformal-verificationrocqhttps://feed.craftedsignal.io/briefs/2026-10-rocq-soundness-vulnerability/Mon, 26 Oct 2026 02:22:26 +0000hello@craftedsignal.iohttps://feed.craftedsignal.io/briefs/2026-10-rocq-soundness-vulnerability/A logic soundness vulnerability in the Rocq kernel allows for the construction of invalid proofs due to improper state management of the universe checking flag after closing a module.A soundness flaw in the Rocq kernel, identified as CVE-2026-72714, allows the construction of proofs of False without the use of axioms, plugins, or unsafe flags. The issue arises from a desynchronization in the module system, where the environment fails to correctly restore the "Universe Checking" flag state after closing a module that had disabled this check locally. Consequently, Print Assumptions incorrectly reports the resulting proofs as closed under the global context. This vulnerability undermines the logical consistency of formal proofs within the affected environment.

Impact

The vulnerability allows users to generate cryptographically or logically invalid proofs that the system accepts as valid, including the derivation of 0 = 1. This could be exploited to bypass security or verification properties in formal proofs relying on Rocq.

Recommendation

• Identify all projects using the Rocq kernel that rely on formal proof verification for security-critical properties.
• Audit existing proof scripts for the use of "Local Unset Universe Checking" commands.
• Review documentation from the Rocq Project for patch availability or guidance on disabling module-local universe checking until a fix is applied.

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