{"id":"CVE-2026-41898","state":"PUBLISHED","title":"rust-openssl: Unchecked callback-returned length in PSK and cookie generate trampolines can cause OpenSSL to leak adjacent memory to the network peer","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.","publishedAt":"2026-04-24T17:20:38.073Z","updatedAt":"2026-04-24T18:01:47.877Z","severity":{"score":8.3,"label":"High","version":"4.0","vector":"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","source":"GitHub_M"},"assigner":"GitHub_M","products":["rust-openssl rust-openssl"],"affected":[{"vendor":"rust-openssl","product":"rust-openssl","versions":[{"version":">= 0.9.24, < 0.10.78","status":"affected"}]}],"references":["https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-hppc-g8h3-xhp3","https://github.com/rust-openssl/rust-openssl/pull/2607","https://github.com/rust-openssl/rust-openssl/commit/1d109020d98fff2fb2e45c39a373af3dff99b24c","https://github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.78"],"weaknesses":["CWE-126","CWE-130"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/41xxx/CVE-2026-41898.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-41898","state":"PUBLISHED","datePublished":"2026-04-24T17:20:38.073Z","dateUpdated":"2026-04-24T18:01:47.877Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-04-22T15:11:54.672Z"},"containers":{"cna":{"title":"rust-openssl: Unchecked callback-returned length in PSK and cookie generate trampolines can cause OpenSSL to leak adjacent memory to the network peer","descriptions":[{"lang":"en","value":"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":[{"vendor":"rust-openssl","product":"rust-openssl","versions":[{"version":">= 0.9.24, < 0.10.78","status":"affected"}]}],"references":[{"url":"https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-hppc-g8h3-xhp3","name":"https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-hppc-g8h3-xhp3","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/rust-openssl/rust-openssl/pull/2607","name":"https://github.com/rust-openssl/rust-openssl/pull/2607","tags":["x_refsource_MISC"]},{"url":"https://github.com/rust-openssl/rust-openssl/commit/1d109020d98fff2fb2e45c39a373af3dff99b24c","name":"https://github.com/rust-openssl/rust-openssl/commit/1d109020d98fff2fb2e45c39a373af3dff99b24c","tags":["x_refsource_MISC"]},{"url":"https://github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.78","name":"https://github.com/rust-openssl/rust-openssl/releases/tag/openssl-v0.10.78","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.3,"baseSeverity":"HIGH","vectorString":"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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-126","lang":"en","description":"CWE-126: Buffer Over-read","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-130","lang":"en","description":"CWE-130: Improper Handling of Length Parameter Inconsistency","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-04-24T17:20:38.073Z"},"source":{"advisory":"GHSA-hppc-g8h3-xhp3","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-24T18:01:38.714785Z","id":"CVE-2026-41898","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-24T18:01:47.877Z"}}]}}}