{"id":"UBUNTU-CVE-2026-48102","details":"7-Zip is a file archiver with a high compression ratio. Versions 9.11 through 26.00 contain a heap out-of-bounds read of up to 3 bytes in the UDF disc image handler's File Identifier Descriptor parser. In CFileId::Parse (CPP/7zip/Archive/Udf/UdfIn.cpp), after validating size \u003c 38 + idLen + impLen and advancing processed to 38 + impLen + idLen, the alignment-padding loop reads p[processed] while incrementing up to 3 times to reach a 4-byte boundary, and the processed \u003c= size bounds check only runs after the loop. When (38 + impLen + idLen) % 4 != 0 and 38 + impLen + idLen == size, the loop reads 1 to 3 bytes past the end of the exact-size heap buffer allocated via buf.Alloc((size_t)item.Size). The UDF handler is registered for .iso and .udf files and auto-detected by signature, and the OOB read triggers during Open() when listing or extracting a crafted UDF image. Impact is limited to information disclosure (a 1-bit oracle per OOB byte via open/fail behavior) and denial of service (crash under hardened allocators); there is no write primitive. Version 26.01 fixes the issue.","modified":"2026-06-12T09:04:20.235444568Z","published":"2026-06-05T16:16:00Z","upstream":["CVE-2026-48102"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-48102"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-48102"},{"type":"REPORT","url":"https://securitylab.github.com/advisories/GHSL-2026-115_GHSL-2026-122_7-zip/"}],"affected":[{"package":{"name":"p7zip","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/p7zip?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.20.1~dfsg.1-4","9.20.1~dfsg.1-4+deb7u1build0.14.04.1","9.20.1~dfsg.1-4+deb7u2build0.14.04.1","9.20.1~dfsg.1-4+deb7u3build0.14.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"p7zip","binary_version":"9.20.1~dfsg.1-4+deb7u3build0.14.04.1"},{"binary_name":"p7zip-full","binary_version":"9.20.1~dfsg.1-4+deb7u3build0.14.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48102.json"}},{"package":{"name":"p7zip","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/p7zip?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.20.1~dfsg.1-4.2","9.20.1~dfsg.1-4.2ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"p7zip","binary_version":"9.20.1~dfsg.1-4.2ubuntu0.1"},{"binary_name":"p7zip-full","binary_version":"9.20.1~dfsg.1-4.2ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48102.json"}},{"package":{"name":"p7zip","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/p7zip?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["16.02+dfsg-4","16.02+dfsg-5","16.02+dfsg-6"],"ecosystem_specific":{"binaries":[{"binary_name":"p7zip","binary_version":"16.02+dfsg-6"},{"binary_name":"p7zip-full","binary_version":"16.02+dfsg-6"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48102.json"}},{"package":{"name":"p7zip","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/p7zip?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["16.02+dfsg-7","16.02+dfsg-7build1"],"ecosystem_specific":{"binaries":[{"binary_version":"16.02+dfsg-7build1","binary_name":"p7zip"},{"binary_name":"p7zip-full","binary_version":"16.02+dfsg-7build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48102.json"}},{"package":{"name":"p7zip","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/p7zip?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["16.02+dfsg-8"],"ecosystem_specific":{"binaries":[{"binary_name":"p7zip","binary_version":"16.02+dfsg-8"},{"binary_name":"p7zip-full","binary_version":"16.02+dfsg-8"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48102.json"}},{"package":{"name":"7zip","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/7zip?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["21.03~beta+dfsg-6","21.04~beta+dfsg-1","21.06+dfsg-1","21.07+dfsg-1","21.07+dfsg-2","21.07+dfsg-3","21.07+dfsg-4","21.07+dfsg-4ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"7zip","binary_version":"21.07+dfsg-4ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48102.json"}},{"package":{"name":"7zip","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/7zip?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["23.01+dfsg-3","23.01+dfsg-7","23.01+dfsg-8","23.01+dfsg-11","23.01+dfsg-11ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"23.01+dfsg-11ubuntu0.1~esm1","binary_name":"7zip"},{"binary_name":"7zip-standalone","binary_version":"23.01+dfsg-11ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48102.json"}},{"package":{"name":"7zip","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/7zip?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["24.09+dfsg-7","24.09+dfsg-8","25.00+dfsg-1","25.01+dfsg-1","25.01+dfsg-2"],"ecosystem_specific":{"binaries":[{"binary_version":"25.01+dfsg-2","binary_name":"7zip"},{"binary_name":"7zip-standalone","binary_version":"25.01+dfsg-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-48102.json"}},{"package":{"name":"7zip","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/7zip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