{"id":"UBUNTU-CVE-2026-107167","details":"A flaw was found in m17n-lib. A user providing specially crafted text input can trigger a heap use-after-free condition during input-method state transitions. Under specific conditions, the library frees an internal input context object but subsequently attempts to write to that freed memory. This issue can cause applications relying on the library to crash, leading to a Denial of Service (DoS), or potentially allow arbitrary code execution.","modified":"2026-10-08T19:47:00.985462648Z","published":"2026-10-08T00:00:00Z","upstream":["CVE-2026-107167"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-107167"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-107167"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2547408"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-107167"}],"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_version":"1.7.0-3","binary_name":"m17n-lib-bin"},{"binary_name":"m17n-lib-mimx","binary_version":"1.7.0-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107167.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_version":"1.7.0-3build1","binary_name":"libm17n-0"},{"binary_name":"m17n-lib-bin","binary_version":"1.7.0-3build1"},{"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-2026-107167.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_name":"libm17n-0","binary_version":"1.8.0-2"},{"binary_name":"m17n-lib-bin","binary_version":"1.8.0-2"},{"binary_version":"1.8.0-2","binary_name":"m17n-lib-mimx"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107167.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_version":"1.8.0-4","binary_name":"m17n-lib-bin"},{"binary_version":"1.8.0-4","binary_name":"m17n-lib-mimx"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107167.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_version":"1.8.4-1build2","binary_name":"libm17n-0"},{"binary_name":"m17n-lib-bin","binary_version":"1.8.4-1build2"},{"binary_version":"1.8.4-1build2","binary_name":"m17n-lib-mimx"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107167.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_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-2026-107167.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}