# RUSTSEC-2026-0191: `EbpfVm::invoke_function` performs out-of-bounds pointer arithmetic

> Out-of-bounds pointer arithmetic in solana_rbpf can cause undefined behavior, potentially leading to code execution or crashes; users should migrate to solana-sbpf.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Not stated
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 May 2026

## What is RUSTSEC-2026-0191?

RUSTSEC-2026-0191 is a memory corruption vulnerability in solana_rbpf, published on 28 May 2026. 

### Official description

Affected versions of `solana_rbpf` expose the safe method
`EbpfVm::invoke_function`. This method computes an obfuscated VM pointer by
casting `self` to `*mut u64` and applying a randomized offset derived from
`get_runtime_environment_key()`.

The resulting pointer arithmetic is performed with `ptr::offset`, which
requires the computed pointer to remain within the same allocation. In practice,
the randomized offset can move the pointer far outside the allocation
containing the `EbpfVm`, causing undefined behavior before the supplied builtin
function is invoked.

## Unmaintained

The upstream `solana_rbpf` repository is archived, and no patched version of
this crate is currently available.

Users should migrate to the maintained [`solana-sbpf`](https://crates.io/crates/solana-sbpf)
crate. The issue has been fixed there in
[`anza-xyz/sbpf#151`](https://github.com/anza-xyz/sbpf/pull/151).

## Which versions are affected by RUSTSEC-2026-0191?

1 open source package ship an affected version, including solana_rbpf.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `solana_rbpf` | crates.io | From 0.8.0 | None |

## How do I fix RUSTSEC-2026-0191?

No fix has been published for RUSTSEC-2026-0191 yet. Limit exposure of the affected software until one is available.

## Is RUSTSEC-2026-0191 being exploited?

There is no known exploitation of RUSTSEC-2026-0191 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for RUSTSEC-2026-0191 and fix it if it is affected.

What it is: RUSTSEC-2026-0191 is a memory corruption vulnerability in solana_rbpf, published on 28 May 2026. 
Exploitation: There is no known exploitation of RUSTSEC-2026-0191 in the wild and no public exploit code.

Affected packages and fixed versions:
- solana_rbpf (crates.io): affected from 0.8.0; no fix listed

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/RUSTSEC-2026-0191/ (Markdown: https://insights.sbomify.com/RUSTSEC-2026-0191/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/RUSTSEC-2026-0191

---
From sbomify Insights: https://insights.sbomify.com/RUSTSEC-2026-0191/
Summaries are generated and may contain mistakes; the official description above is the record.