# CVE-2026-41898

## Summary

- **CVE ID:** CVE-2026-41898
- **Severity:** HIGH
- **CVSS Score:** 8.3 (CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N)
- **CWE:** CWE-126, CWE-130
- **Published:** Apr 24, 2026
- **Last Modified:** Apr 24, 2026

## Description

rust-openssl provides OpenSSL bindings for the Rust programming language.  From 0.9.24 to before 0.10.78, the FFI trampolines behind SslContextBuilder::set_psk_client_callback, set_psk_server_callback, set_cookie_generate_cb, and set_stateless_cookie_generate_cb forwarded the user closure's returned usize directly to OpenSSL without checking it against the &mut [u8] that was handed to the closure. This can lead to buffer overflows and other unintended consequences. This vulnerability is fixed in 0.10.78.

## Affected Products

- rust-openssl — rust-openssl (>= 0.9.24, < 0.10.78)

## References

- [CNA](https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-hppc-g8h3-xhp3)
- [CNA](https://github.com/rust-openssl/rust-openssl/pull/2607)
- [CNA](https://github.com/rust-openssl/rust-openssl/commit/1d109020d98fff2fb2e45c39a373af3dff99b24c)
- [CNA](https://github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.78)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.28%
- **EPSS Percentile:** 20.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._