{"id":"UBUNTU-CVE-2026-77220","details":"PDFio before 1.6.5 contains a dangling pointer vulnerability in the dictionary string-formatting function that stores a pointer to a stack-local buffer in the document dictionary without copying the string value. In multi-threaded or pooled-request environments, attackers or concurrent users can trigger stack memory reuse across requests, causing cross-tenant document content corruption by silently overwriting one caller's dictionary string values with another caller's data.","modified":"2026-09-02T19:36:49.773300295Z","published":"2026-08-21T21:17:00Z","upstream":["CVE-2026-77220"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-77220"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-77220"}],"affected":[{"package":{"name":"ippsample","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/ippsample?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.0+20180213-0ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"ippsample","binary_version":"0.0+20180213-0ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-77220.json"}},{"package":{"name":"ippsample","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/ippsample?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.0+20180213-0ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"ippsample","binary_version":"0.0+20180213-0ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-77220.json"}},{"package":{"name":"ippsample","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/ippsample?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.0+20180213-0ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"ippsample","binary_version":"0.0+20180213-0ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-77220.json"}},{"package":{"name":"ippsample","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/ippsample?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.0+20180213-0ubuntu1","0.0+20180213-0ubuntu2","0.0+20180213-0ubuntu3"],"ecosystem_specific":{"binaries":[{"binary_version":"0.0+20180213-0ubuntu3","binary_name":"ippsample"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-77220.json"}},{"package":{"name":"ippsample","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/ippsample?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.0+20180213-0ubuntu3","0.0.0~git20220215.f365352-1","0.0.0~git20220215.f365352-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"ippsample","binary_version":"0.0.0~git20220215.f365352-1build1"},{"binary_version":"0.0.0~git20220215.f365352-1build1","binary_name":"ippsample-data"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-77220.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}