{"id":"UBUNTU-CVE-2026-109854","details":"A flaw was found in m17n-lib. An attacker who supplies crafted input to an application processing ISO-2022 encoded text can cause the library to read uninitialized memory from the stack. If the application exposes or returns the decoded output, this flaw can result in unexpected behavior and limited information disclosure.","modified":"2026-10-17T12:58:03.435047698Z","published":"2026-10-13T10:17:00Z","upstream":["CVE-2026-109854"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-109854"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-109854"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-109854"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2550285"},{"type":"REPORT","url":"https://cgit.git.savannah.nongnu.org/cgit/m17n/m17n-lib.git/commit/?id=f3b85087f90189f91c04ba1b62c5f0b879ff2b20"},{"type":"REPORT","url":"https://lists.gnu.org/archive/html/m17n-list/2026-10/msg00001.html"}],"affected":[{"package":{"name":"m17n-lib","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/m17n-lib?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.4-3","1.7.0-1","1.7.0-2","1.7.0-3"],"ecosystem_specific":{"binaries":[{"binary_version":"1.7.0-3","binary_name":"libm17n-0"},{"binary_name":"m17n-lib-bin","binary_version":"1.7.0-3"},{"binary_version":"1.7.0-3","binary_name":"m17n-lib-mimx"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109854.json"}},{"package":{"name":"m17n-lib","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/m17n-lib?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.7.0-3","1.7.0-3build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libm17n-0","binary_version":"1.7.0-3build1"},{"binary_version":"1.7.0-3build1","binary_name":"m17n-lib-bin"},{"binary_name":"m17n-lib-mimx","binary_version":"1.7.0-3build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109854.json"}},{"package":{"name":"m17n-lib","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/m17n-lib?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.0-2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.8.0-2","binary_name":"libm17n-0"},{"binary_name":"m17n-lib-bin","binary_version":"1.8.0-2"},{"binary_name":"m17n-lib-mimx","binary_version":"1.8.0-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109854.json"}},{"package":{"name":"m17n-lib","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/m17n-lib?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.0-2build1","1.8.0-3","1.8.0-3build1","1.8.0-3.1","1.8.0-4"],"ecosystem_specific":{"binaries":[{"binary_version":"1.8.0-4","binary_name":"libm17n-0"},{"binary_name":"m17n-lib-bin","binary_version":"1.8.0-4"},{"binary_name":"m17n-lib-mimx","binary_version":"1.8.0-4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109854.json"}},{"package":{"name":"m17n-lib","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/m17n-lib?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.4-1","1.8.4-1build1","1.8.4-1build2"],"ecosystem_specific":{"binaries":[{"binary_name":"libm17n-0","binary_version":"1.8.4-1build2"},{"binary_name":"m17n-lib-bin","binary_version":"1.8.4-1build2"},{"binary_name":"m17n-lib-mimx","binary_version":"1.8.4-1build2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109854.json"}},{"package":{"name":"m17n-lib","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/m17n-lib?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.6-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libm17n-0","binary_version":"1.8.6-1"},{"binary_name":"m17n-lib-bin","binary_version":"1.8.6-1"},{"binary_name":"m17n-lib-mimx","binary_version":"1.8.6-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109854.json"}},{"package":{"name":"m17n-lib","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/m17n-lib?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.5-1build1","1.8.6-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libm17n-0","binary_version":"1.8.6-1"},{"binary_version":"1.8.6-1","binary_name":"m17n-lib-bin"},{"binary_name":"m17n-lib-mimx","binary_version":"1.8.6-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109854.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}