lean-cve-poc

CVE-2026-72844: Lean 4 Kernel Soundness Bug Proving0 = 1 axiom-free via nested inductive projection validation bypass...

CVE-2026-31413-BPF-Container-Escape

CVE-2026-31413: One Byte in the BPF Verifier to Container Escape I found a soundness bug in the Linux BPF verifier - a + 1 in a pushstack call that causes the verifier to skip an ALU instruction on a forked path. For BPFOR, this means the verifier tracks dst = 0 while the CPU computes 0 | K = K. ...

CVE-2026-53671

PREVAIL is a Polynomial-Runtime EBPF Verifier using an Abstract Interpretation Layer. Prior to version 0.2.4, the abstract transformer in prevail treats writes through a TCTX-typed base register as a silent no-op: domemstore in src/crab/ebpftransformer.cpp only models TSTACK stores, and the...

CVE-2026-72705

A flaw was found in Rocq Prover. The guard checker component fails to properly track recursive calls when a fixpoint passes itself as a higher-order argument to another fixpoint. This oversight allows for the creation of a type that is logically equivalent to its own negation, which can lead to t...

CVE-2026-72703

A flaw was found in Rocq Prover. The guard checker incorrectly processes parameters of nested mutual fixpoints when cross-calls occur between different bodies of the fixpoint. This oversight allows the system to accept non-terminating definitions as structurally decreasing. This critical logical...

CVE-2020-37268

A flaw was found in Coq and Rocq provers. The Print Assumptions feature, which is used to audit the soundness of proofs, fails to report when a definition was created without proper "universe checking" a mechanism to ensure logical consistency. This occurs when the definition is incorporated...

CVE-2026-72711

The Lean 4 kernel does not check that the body of an opaque declaration is closed. environment::addopaque omits the checknometavarnofvar call that the definition and theorem paths perform, so a value containing a free variable that is absent from the local context is not rejected outright. A...

CVE-2026-72703

The 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. finduniformparameters in kernel/inductive.ml inspects only self-recursive calls, so when no body calls itself the function concludes th...

CVE-2026-72705

The guard checker in Rocq Prover does not follow recursive calls made through a fixpoint's own arguments. A fixpoint may pass itself as a higher-order argument to a second fixpoint, which then applies it to a value that is not a subterm of the structural argument. Passing the recursive function t...

CVE-2020-37268

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...

CVE-2026-72711 Lean 4 before 4.32.2 Kernel Accepts Opaque Declaration With an Unbound Free Variable

The Lean 4 kernel does not check that the body of an opaque declaration is closed. environment::addopaque omits the checknometavarnofvar call that the definition and theorem paths perform, so a value containing a free variable that is absent from the local context is not rejected outright. A...

CVE-2026-72714 Rocq Prover through 9.2.0 Universe Checking State Desynchronised After Module Close

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...

EUVD-2026-65143

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...

CVE-2026-72711

CVE-2026-72711 is a kernel soundness flaw in Lean 4 before 4.32.2. The function environment::add_opaque omits the check_no_metavar_no_fvar closure check that the definition and theorem paths perform. A metaprogram can exploit a stale entry in the type checker's inference cache to submit an opaque...

EUVD-2026-65142

The Lean 4 kernel does not check that the body of an opaque declaration is closed. environment::addopaque omits the checknometavarnofvar call that the definition and theorem paths perform, so a value containing a free variable that is absent from the local context is not rejected outright. A...

CVE-2026-72714

Rocq Prover (through 9.2.0) contains a state desynchronization in its universe checking mechanism. When a module that locally disabled the universe checking flag is closed, the global flag is restored but the universe graph retains its own copy left disabled . The kernel then accepts universe-inc...

CVE-2026-72711 Lean 4 before 4.32.2 Kernel Accepts Opaque Declaration With an Unbound Free Variable

The Lean 4 kernel does not check that the body of an opaque declaration is closed. environment::addopaque omits the checknometavarnofvar call that the definition and theorem paths perform, so a value containing a free variable that is absent from the local context is not rejected outright. A...

CVE-2026-72711 Lean 4 before 4.32.2 Kernel Accepts Opaque Declaration With an Unbound Free Variable

The Lean 4 kernel does not check that the body of an opaque declaration is closed. environment::addopaque omits the checknometavarnofvar call that the definition and theorem paths perform, so a value containing a free variable that is absent from the local context is not rejected outright. A...

CVE-2026-72705

CVE-2026-72705 is a soundness flaw in the guard checker of Rocq Prover (before 9.2.0). The checker fails to track recursive calls when a fixpoint passes itself as a higher-order argument to another fixpoint, which then applies it to a non-subterm value. This admits a type definitionally equal to ...

CVE-2026-72704 Rocq Prover through 9.2.0 Guard Checker Trusts Corrupted Recursive Tree After Transport

The guard checker in Rocq Prover does not recheck the recursive tree representation of an inductive type parameter after that parameter has been changed by transport. A fixpoint may apply a rewrite along an equality between types to its recursive argument, which the guard checker accepts because...