{"id":"UBUNTU-CVE-2026-26825","details":"A use-of-uninitialized memory vulnerability exists in libxls 1.6.3 when parsing malformed XLS files. The issue is reachable via xls_parseWorkBook() and is triggered by uninitialized heap memory originating from the OLE layer (ole2_read). The flaw is detectable with MemorySanitizer (MSAN) and can lead to undefined behavior, incorrect parsing logic, or potential information disclosure.","modified":"2026-06-11T13:03:38Z","published":"2026-06-03T20:16:00Z","upstream":["CVE-2026-26825"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-26825"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-26825"},{"type":"REPORT","url":"https://github.com/libxls/libxls/issues/156"}],"affected":[{"package":{"name":"r-cran-readxl","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/r-cran-readxl?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.1.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"r-cran-readxl","binary_version":"0.1.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26825.json"}},{"package":{"name":"r-cran-readxl","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/r-cran-readxl?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.0-1build1","1.0.0-2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.0.0-2","binary_name":"r-cran-readxl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26825.json"}},{"package":{"name":"r-cran-readxl","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/r-cran-readxl?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.1-2","1.3.1-2build1"],"ecosystem_specific":{"binaries":[{"binary_name":"r-cran-readxl","binary_version":"1.3.1-2build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26825.json"}},{"package":{"name":"r-cran-readxl","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/r-cran-readxl?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.1-2build2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.3.1-2build2","binary_name":"r-cran-readxl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26825.json"}},{"package":{"name":"r-cran-readxl","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/r-cran-readxl?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.3-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.4.3-1","binary_name":"r-cran-readxl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26825.json"}},{"package":{"name":"r-cran-readxl","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/r-cran-readxl?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.5-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.4.5-1","binary_name":"r-cran-readxl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26825.json"}},{"package":{"name":"r-cran-readxl","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/r-cran-readxl?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.5-1"],"ecosystem_specific":{"binaries":[{"binary_name":"r-cran-readxl","binary_version":"1.4.5-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26825.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}