{"id":"CVE-2026-41898","aliases":["GHSA-hppc-g8h3-xhp3"],"url":"https://o3.security/vulnerability/CVE-2026-41898","summary":"rust-openssl: Unchecked callback-returned length in PSK and cookie generate trampolines can cause OpenSSL to leak adjacent memory to the network peer","details":"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.","published":"2026-04-24T17:20:38.073Z","modified":"2026-09-10T18:26:52.399834650Z","cvss":null,"epss":{"score":0.0028,"percentile":0.20195,"asOf":"2026-09-04"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"crates.io","name":"openssl","fixedVersion":"0.10.78"}],"fix":{"url":"https://github.com/rust-openssl/rust-openssl/commit/1d109020d98fff2fb2e45c39a373af3dff99b24c","label":"rust-openssl/rust-openssl@1d10902"},"references":[{"type":"WEB","url":"https://github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.78"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41898.json"},{"type":"ADVISORY","url":"https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-hppc-g8h3-xhp3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41898"},{"type":"FIX","url":"https://github.com/rust-openssl/rust-openssl/commit/1d109020d98fff2fb2e45c39a373af3dff99b24c"},{"type":"FIX","url":"https://github.com/rust-openssl/rust-openssl/pull/2607"},{"type":"PACKAGE","url":"https://github.com/rust-openssl/rust-openssl"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-10T18:26:52.399834650Z"}}