{"id":"UBUNTU-CVE-2026-116738","details":"VMime through 0.9.2 contains an integer underflow in the uuEncoder::decode function that allows remote attackers to trigger a stack-based buffer overflow via crafted uuencoded MIME parts. Attackers can send an email with a uuencoded line whose length character is 'b' but is not a 'begin' line, corrupting stack memory to crash the application or potentially execute code.","modified":"2026-11-04T03:30:26.357389028Z","published":"2026-11-03T00:00:00Z","upstream":["CVE-2026-116738"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-116738"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-116738"},{"type":"REPORT","url":"https://github.com/kisli/vmime/pull/363"},{"type":"REPORT","url":"https://github.com/kisli/vmime"},{"type":"REPORT","url":"https://github.com/kisli/vmime/blob/v0.9.2/src/vmime/utility/encoder/uuEncoder.cpp#L185-L190"},{"type":"REPORT","url":"https://github.com/kisli/vmime/commit/e85925eddc638939f0eeb7ee55ec047d04a760d8"},{"type":"REPORT","url":"https://hackmd.io/@haindpwn/vmime-uuencode-decoder-oob-write"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/vmime-through-0.9.2-stack-based-buffer-overflow-via-uuencode-decoder"}],"affected":[{"package":{"name":"libvmime","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libvmime?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.1-4","0.9.1-5build1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.9.1-5build1","binary_name":"libvmime0"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116738.json"}},{"package":{"name":"libvmime","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libvmime?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.2-3","0.9.2-3build1","0.9.2-5build2"],"ecosystem_specific":{"binaries":[{"binary_name":"libvmime1","binary_version":"0.9.2-5build2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116738.json"}},{"package":{"name":"libvmime","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libvmime?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.2-5build3","0.9.2-5ubuntu1","0.9.2-5ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_name":"libvmime1","binary_version":"0.9.2-5ubuntu2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116738.json"}},{"package":{"name":"libvmime","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libvmime?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.2-6build1","0.9.2-7","0.9.2-8","0.9.2-8build1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.9.2-8build1","binary_name":"libvmime1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116738.json"}},{"package":{"name":"libvmime","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libvmime?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.2-8.1","0.9.2-8.1build1","0.9.2-8.2build1","0.9.2-8.2build2"],"ecosystem_specific":{"binaries":[{"binary_version":"0.9.2-8.2build2","binary_name":"libvmime1t64"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116738.json"}},{"package":{"name":"libvmime","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/libvmime?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.2-9build1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.9.2-9build1","binary_name":"libvmime1t64"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116738.json"}},{"package":{"name":"libvmime","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libvmime?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.2-9","0.9.2-9build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libvmime1t64","binary_version":"0.9.2-9build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116738.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}