{"id":"UBUNTU-CVE-2026-25749","details":"Vim is an open source, command line text editor. Prior to version 9.1.2132, a heap buffer overflow vulnerability exists in Vim's tag file resolution logic when processing the 'helpfile' option. The vulnerability is located in the get_tagfname() function in src/tag.c. When processing help file tags, Vim copies the user-controlled 'helpfile' option value into a fixed-size heap buffer of MAXPATHL + 1 bytes (typically 4097 bytes) using an unsafe STRCPY() operation without any bounds checking. This issue has been patched in version 9.1.2132.","modified":"2026-03-19T08:31:52.472943Z","published":"2026-02-06T23:15:00Z","related":["USN-8101-1"],"upstream":["CVE-2026-25749"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-25749"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-25749"},{"type":"REPORT","url":"https://github.com/vim/vim/security/advisories/GHSA-5w93-4g67-mm43"},{"type":"REPORT","url":"https://github.com/vim/vim/releases/tag/v9.1.2132"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8101-1"}],"affected":[{"package":{"name":"vim","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/vim@2:7.4.052-1ubuntu3.1+esm23?arch=source&distro=esm-infra-legacy/trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:7.4.052-1ubuntu3.1+esm23"}]}],"versions":["2:7.4.000-1ubuntu2","2:7.4.052-1ubuntu1","2:7.4.052-1ubuntu2","2:7.4.052-1ubuntu3","2:7.4.052-1ubuntu3.1","2:7.4.052-1ubuntu3.1+esm1","2:7.4.052-1ubuntu3.1+esm3","2:7.4.052-1ubuntu3.1+esm4","2:7.4.052-1ubuntu3.1+esm5","2:7.4.052-1ubuntu3.1+esm6","2:7.4.052-1ubuntu3.1+esm7","2:7.4.052-1ubuntu3.1+esm8","2:7.4.052-1ubuntu3.1+esm9","2:7.4.052-1ubuntu3.1+esm10","2:7.4.052-1ubuntu3.1+esm11","2:7.4.052-1ubuntu3.1+esm12","2:7.4.052-1ubuntu3.1+esm13","2:7.4.052-1ubuntu3.1+esm14","2:7.4.052-1ubuntu3.1+esm15","2:7.4.052-1ubuntu3.1+esm16","2:7.4.052-1ubuntu3.1+esm17","2:7.4.052-1ubuntu3.1+esm18","2:7.4.052-1ubuntu3.1+esm19","2:7.4.052-1ubuntu3.1+esm20","2:7.4.052-1ubuntu3.1+esm21","2:7.4.052-1ubuntu3.1+esm22"],"ecosystem_specific":{"binaries":[{"binary_name":"vim","binary_version":"2:7.4.052-1ubuntu3.1+esm23"},{"binary_name":"vim-athena","binary_version":"2:7.4.052-1ubuntu3.1+esm23"},{"binary_name":"vim-common","binary_version":"2:7.4.052-1ubuntu3.1+esm23"},{"binary_name":"vim-gnome","binary_version":"2:7.4.052-1ubuntu3.1+esm23"},{"binary_name":"vim-gtk","binary_version":"2:7.4.052-1ubuntu3.1+esm23"},{"binary_name":"vim-gui-common","binary_version":"2:7.4.052-1ubuntu3.1+esm23"},{"binary_name":"vim-lesstif","binary_version":"2:7.4.052-1ubuntu3.1+esm23"},{"binary_name":"vim-nox","binary_version":"2:7.4.052-1ubuntu3.1+esm23"},{"binary_name":"vim-runtime","binary_version":"2:7.4.052-1ubuntu3.1+esm23"},{"binary_name":"vim-tiny","binary_version":"2:7.4.052-1ubuntu3.1+esm23"}],"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro","priority_reason":"Input that can cause a buffer overflow is supplied by the user"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-25749.json"}},{"package":{"name":"vim","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/vim@2:7.4.1689-3ubuntu1.5+esm29?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:7.4.1689-3ubuntu1.5+esm29"}]}],"versions":["2:7.4.712-2ubuntu4","2:7.4.826-1ubuntu1","2:7.4.826-1ubuntu2","2:7.4.826-1ubuntu3","2:7.4.963-1ubuntu1","2:7.4.963-1ubuntu4","2:7.4.963-1ubuntu5","2:7.4.1689-3ubuntu1","2:7.4.1689-3ubuntu1.1","2:7.4.1689-3ubuntu1.2","2:7.4.1689-3ubuntu1.3","2:7.4.1689-3ubuntu1.4","2:7.4.1689-3ubuntu1.5","2:7.4.1689-3ubuntu1.5+esm2","2:7.4.1689-3ubuntu1.5+esm3","2:7.4.1689-3ubuntu1.5+esm4","2:7.4.1689-3ubuntu1.5+esm5","2:7.4.1689-3ubuntu1.5+esm6","2:7.4.1689-3ubuntu1.5+esm7","2:7.4.1689-3ubuntu1.5+esm8","2:7.4.1689-3ubuntu1.5+esm10","2:7.4.1689-3ubuntu1.5+esm11","2:7.4.1689-3ubuntu1.5+esm12","2:7.4.1689-3ubuntu1.5+esm13","2:7.4.1689-3ubuntu1.5+esm14","2:7.4.1689-3ubuntu1.5+esm15","2:7.4.1689-3ubuntu1.5+esm17","2:7.4.1689-3ubuntu1.5+esm18","2:7.4.1689-3ubuntu1.5+esm19","2:7.4.1689-3ubuntu1.5+esm20","2:7.4.1689-3ubuntu1.5+esm22","2:7.4.1689-3ubuntu1.5+esm23","2:7.4.1689-3ubuntu1.5+esm24","2:7.4.1689-3ubuntu1.5+esm25","2:7.4.1689-3ubuntu1.5+esm26","2:7.4.1689-3ubuntu1.5+esm27","2:7.4.1689-3ubuntu1.5+esm28"],"ecosystem_specific":{"binaries":[{"binary_name":"vim","binary_version":"2:7.4.1689-3ubuntu1.5+esm29"},{"binary_name":"vim-athena","binary_version":"2:7.4.1689-3ubuntu1.5+esm29"},{"binary_name":"vim-athena-py2","binary_version":"2:7.4.1689-3ubuntu1.5+esm29"},{"binary_name":"vim-common","binary_version":"2:7.4.1689-3ubuntu1.5+esm29"},{"binary_name":"vim-gnome","binary_version":"2:7.4.1689-3ubuntu1.5+esm29"},{"binary_name":"vim-gnome-py2","binary_version":"2:7.4.1689-3ubuntu1.5+esm29"},{"binary_name":"vim-gtk","binary_version":"2:7.4.1689-3ubuntu1.5+esm29"},{"binary_name":"vim-gtk-py2","binary_version":"2:7.4.1689-3ubuntu1.5+esm29"},{"binary_name":"vim-gtk3","binary_version":"2:7.4.1689-3ubuntu1.5+esm29"},{"binary_name":"vim-gtk3-py2","binary_version":"2:7.4.1689-3ubuntu1.5+esm29"},{"binary_name":"vim-gui-common","binary_version":"2:7.4.1689-3ubuntu1.5+esm29"},{"binary_name":"vim-nox","binary_version":"2:7.4.1689-3ubuntu1.5+esm29"},{"binary_name":"vim-nox-py2","binary_version":"2:7.4.1689-3ubuntu1.5+esm29"},{"binary_name":"vim-runtime","binary_version":"2:7.4.1689-3ubuntu1.5+esm29"},{"binary_name":"vim-tiny","binary_version":"2:7.4.1689-3ubuntu1.5+esm29"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","priority_reason":"Input that can cause a buffer overflow is supplied by the 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