{"id":"UBUNTU-CVE-2026-15997","details":"Out-of-bounds write vulnerability in Legion of the Bouncy Castle Inc. BC-LTS bcprov-lts8on on ARM allows Overflow Buffers.  This vulnerability is associated with program files https://github.Com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/shake.C, https://github.Com/bcgit/bc-lts-java/blob/main/native_c/arm/sha/sha3.C. This issue affects BC-LTS: from 2.73.0 before 2.73.12.1. Issue is only applicable if application involved is accepting memoable SHA3 / SHAKE states from potentially untrusted sources.","modified":"2026-07-29T07:53:22Z","published":"2026-07-16T23:16:00Z","upstream":["CVE-2026-15997"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-15997"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-15997"},{"type":"REPORT","url":"https://github.com/bcgit/bc-lts-java/wiki/CVE-2026-15997"}],"affected":[{"package":{"name":"bouncycastle","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/bouncycastle?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.49+dfsg-3ubuntu1","1.51-4ubuntu1","1.51-4ubuntu1+esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.51-4ubuntu1+esm1","binary_name":"libbcmail-java"},{"binary_name":"libbcpg-java","binary_version":"1.51-4ubuntu1+esm1"},{"binary_name":"libbcpkix-java","binary_version":"1.51-4ubuntu1+esm1"},{"binary_name":"libbcprov-java","binary_version":"1.51-4ubuntu1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15997.json"}},{"package":{"name":"bouncycastle","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/bouncycastle?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.57-1","1.58-1","1.59-1","1.59-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libbcmail-java","binary_version":"1.59-1ubuntu0.1~esm1"},{"binary_version":"1.59-1ubuntu0.1~esm1","binary_name":"libbcpg-java"},{"binary_name":"libbcpkix-java","binary_version":"1.59-1ubuntu0.1~esm1"},{"binary_version":"1.59-1ubuntu0.1~esm1","binary_name":"libbcprov-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15997.json"}},{"package":{"name":"bouncycastle","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/bouncycastle?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.61-1","1.61-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libbcmail-java","binary_version":"1.61-1ubuntu0.1~esm1"},{"binary_name":"libbcpg-java","binary_version":"1.61-1ubuntu0.1~esm1"},{"binary_version":"1.61-1ubuntu0.1~esm1","binary_name":"libbcpkix-java"},{"binary_version":"1.61-1ubuntu0.1~esm1","binary_name":"libbcprov-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15997.json"}},{"package":{"name":"bouncycastle","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/bouncycastle?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.68-2","1.68-4","1.68-5","1.68-5ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libbcmail-java","binary_version":"1.68-5ubuntu0.1~esm1"},{"binary_version":"1.68-5ubuntu0.1~esm1","binary_name":"libbcpg-java"},{"binary_name":"libbcpkix-java","binary_version":"1.68-5ubuntu0.1~esm1"},{"binary_name":"libbcprov-java","binary_version":"1.68-5ubuntu0.1~esm1"},{"binary_name":"libbctls-java","binary_version":"1.68-5ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15997.json"}},{"package":{"name":"bouncycastle","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/bouncycastle?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.72-2","1.77-1","1.77-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.77-1ubuntu0.1~esm1","binary_name":"libbcjmail-java"},{"binary_name":"libbcmail-java","binary_version":"1.77-1ubuntu0.1~esm1"},{"binary_name":"libbcpg-java","binary_version":"1.77-1ubuntu0.1~esm1"},{"binary_name":"libbcpkix-java","binary_version":"1.77-1ubuntu0.1~esm1"},{"binary_name":"libbcprov-java","binary_version":"1.77-1ubuntu0.1~esm1"},{"binary_name":"libbctls-java","binary_version":"1.77-1ubuntu0.1~esm1"},{"binary_name":"libbcutil-java","binary_version":"1.77-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15997.json"}},{"package":{"name":"bouncycastle","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/bouncycastle?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.80-3"],"ecosystem_specific":{"binaries":[{"binary_name":"libbcjmail-java","binary_version":"1.80-3"},{"binary_version":"1.80-3","binary_name":"libbcmail-java"},{"binary_name":"libbcpg-java","binary_version":"1.80-3"},{"binary_name":"libbcpkix-java","binary_version":"1.80-3"},{"binary_name":"libbcprov-java","binary_version":"1.80-3"},{"binary_version":"1.80-3","binary_name":"libbctls-java"},{"binary_name":"libbcutil-java","binary_version":"1.80-3"}]},"database_specific":{"source":"https://github.com/canon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