{"id":"UBUNTU-CVE-2026-95520","details":"A heap-based buffer overflow flaw was found in rpm. Parsing a symlink entry in an untrusted RPM package whose declared RPMTAG_LONGFILESIZES value is 0xFFFFFFFFFFFFFFFF causes an integer overflow in iterReadArchiveNext() that shrinks a buffer allocation to one byte, after which the payload's independently-controlled cpio filesize field is used to write attacker-controlled data past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an  untrusted package.","modified":"2026-10-01T00:22:42.796290544Z","published":"2026-09-29T12:17:00Z","upstream":["CVE-2026-95520"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-95520"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-95520"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2537809"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-95520"}],"affected":[{"package":{"name":"rpm","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/rpm?arch=source&distro=trusty%2Fesm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.11.1-2","4.11.1-3","4.11.1-3ubuntu0.1","4.11.1-3ubuntu0.1+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"debugedit","binary_version":"4.11.1-3ubuntu0.1+esm1"},{"binary_name":"librpm3","binary_version":"4.11.1-3ubuntu0.1+esm1"},{"binary_name":"librpmbuild3","binary_version":"4.11.1-3ubuntu0.1+esm1"},{"binary_name":"librpmio3","binary_version":"4.11.1-3ubuntu0.1+esm1"},{"binary_name":"librpmsign1","binary_version":"4.11.1-3ubuntu0.1+esm1"},{"binary_name":"python-rpm","binary_version":"4.11.1-3ubuntu0.1+esm1"},{"binary_version":"4.11.1-3ubuntu0.1+esm1","binary_name":"rpm"},{"binary_name":"rpm-common","binary_version":"4.11.1-3ubuntu0.1+esm1"},{"binary_name":"rpm-i18n","binary_version":"4.11.1-3ubuntu0.1+esm1"},{"binary_version":"4.11.1-3ubuntu0.1+esm1","binary_name":"rpm2cpio"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95520.json"}},{"package":{"name":"rpm","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/rpm?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.12.0.1+dfsg1-3build2","4.12.0.1+dfsg1-3build3","4.12.0.1+dfsg1-3ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"debugedit","binary_version":"4.12.0.1+dfsg1-3ubuntu0.1~esm1"},{"binary_version":"4.12.0.1+dfsg1-3ubuntu0.1~esm1","binary_name":"librpm3"},{"binary_name":"librpmbuild3","binary_version":"4.12.0.1+dfsg1-3ubuntu0.1~esm1"},{"binary_name":"librpmio3","binary_version":"4.12.0.1+dfsg1-3ubuntu0.1~esm1"},{"binary_name":"librpmsign3","binary_version":"4.12.0.1+dfsg1-3ubuntu0.1~esm1"},{"binary_version":"4.12.0.1+dfsg1-3ubuntu0.1~esm1","binary_name":"python-rpm"},{"binary_name":"python3-rpm","binary_version":"4.12.0.1+dfsg1-3ubuntu0.1~esm1"},{"binary_version":"4.12.0.1+dfsg1-3ubuntu0.1~esm1","binary_name":"rpm"},{"binary_name":"rpm-common","binary_version":"4.12.0.1+dfsg1-3ubuntu0.1~esm1"},{"binary_name":"rpm-i18n","binary_version":"4.12.0.1+dfsg1-3ubuntu0.1~esm1"},{"binary_version":"4.12.0.1+dfsg1-3ubuntu0.1~esm1","binary_name":"rpm2cpio"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95520.json"}},{"package":{"name":"rpm","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/rpm?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.12.0.2+dfsg1-2build2","4.14.0+dfsg1-2","4.14.1+dfsg1-2","4.14.1+dfsg1-2ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"debugedit","binary_version":"4.14.1+dfsg1-2ubuntu0.1~esm1"},{"binary_name":"librpm8","binary_version":"4.14.1+dfsg1-2ubuntu0.1~esm1"},{"binary_name":"librpmbuild8","binary_version":"4.14.1+dfsg1-2ubuntu0.1~esm1"},{"binary_version":"4.14.1+dfsg1-2ubuntu0.1~esm1","binary_name":"librpmio8"},{"binary_name":"librpmsign8","binary_version":"4.14.1+dfsg1-2ubuntu0.1~esm1"},{"binary_version":"4.14.1+dfsg1-2ubuntu0.1~esm1","binary_name":"python-rpm"},{"binary_name":"python3-rpm","binary_version":"4.14.1+dfsg1-2ubuntu0.1~esm1"},{"binary_version":"4.14.1+dfsg1-2ubuntu0.1~esm1","binary_name":"rpm"},{"binary_version":"4.14.1+dfsg1-2ubuntu0.1~esm1","binary_name":"rpm-common"},{"binary_version":"4.14.1+dfsg1-2ubuntu0.1~esm1","binary_name":"rpm-i18n"},{"binary_version":"4.14.1+dfsg1-2ubuntu0.1~esm1","binary_name":"rpm2cpio"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95520.json"}},{"package":{"name":"rpm","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/rpm?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.14.2.1+dfsg1-1","4.14.2.1+dfsg1-1build1","4.14.2.1+dfsg1-1build2","4.14.2.1+dfsg1-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"debugedit","binary_version":"4.14.2.1+dfsg1-1ubuntu0.1~esm1"},{"binary_version":"4.14.2.1+dfsg1-1ubuntu0.1~esm1","binary_name":"librpm8"},{"binary_name":"librpmbuild8","binary_version":"4.14.2.1+dfsg1-1ubuntu0.1~esm1"},{"binary_version":"4.14.2.1+dfsg1-1ubuntu0.1~esm1","binary_name":"librpmio8"},{"binary_name":"librpmsign8","binary_version":"4.14.2.1+dfsg1-1ubuntu0.1~esm1"},{"binary_name":"python-rpm","binary_version":"4.14.2.1+dfsg1-1ubuntu0.1~esm1"}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