{"id":"UBUNTU-CVE-2026-41678","details":"rust-openssl provides OpenSSL bindings for the Rust programming language. From  to before 0.10.78, aes::unwrap_key() contains an incorrect assertion: it checks that out.len() + 8 \u003c= in_.len(), but this condition is reversed. The intended invariant is out.len() \u003e= in_.len() - 8, ensuring the output buffer is large enough. Because of the inverted check, the function only accepts buffers at or below the minimum required size and rejects larger ones. If a smaller buffer is provided the function will write past the end of out by in_.len() - 8 - out.len() bytes, causing an out-of-bounds write from a safe public function. This vulnerability is fixed in 0.10.78.","modified":"2026-07-24T15:34:44.131694427Z","published":"2026-04-24T18:16:00Z","upstream":["CVE-2026-41678"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-41678"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-41678"},{"type":"REPORT","url":"https://github.com/rust-openssl/rust-openssl/security/advisories/GHSA-8c75-8mhr-p7r9"}],"affected":[{"package":{"name":"rust-openssl","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/rust-openssl?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.10.29-1","0.10.36-1","0.10.36-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"librust-openssl-dev","binary_version":"0.10.36-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41678.json"}},{"package":{"name":"rust-openssl","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/rust-openssl?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.10.45-1","0.10.57-1","0.10.57-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"librust-openssl-dev","binary_version":"0.10.57-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41678.json"}},{"package":{"name":"rust-openssl","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/rust-openssl?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.10.70-1","0.10.72-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.10.72-1","binary_name":"librust-openssl-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41678.json"}},{"package":{"name":"rust-openssl","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/rust-openssl?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.10.72-1","0.10.73-1"],"ecosystem_specific":{"binaries":[{"binary_name":"librust-openssl-dev","binary_version":"0.10.73-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41678.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}