{"id":"UBUNTU-CVE-2026-13595","details":"A flaw was found in the libblkid library of util-linux. During nested partition probing, the BSD, Minix, Solaris x86, and UnixWare partition probers cache a raw pointer to a parent partition entry in a dynamically allocated array. When subsequent partition additions cause the array to be reallocated, this pointer becomes stale, leading to a heap use-after-free read. An attacker who can present a crafted block device image (for example, via USB insertion or a loop-mounted disk image) can trigger this flaw without user interaction, as libblkid is invoked automatically by udev/udisks as root on block-device hot-plug events. This could lead to limited information disclosure or denial of service.","modified":"2026-08-31T22:15:13.833765170Z","published":"2026-06-29T09:16:00Z","related":["USN-8702-1"],"upstream":["CVE-2026-13595"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-13595"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-13595"},{"type":"REPORT","url":"https://access.redhat.com/errata/RHSA-2026:26573"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-13595"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8702-1"}],"affected":[{"package":{"name":"util-linux","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/util-linux?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.20.1-5.1ubuntu9","2.20.1-5.1ubuntu10","2.20.1-5.1ubuntu11","2.20.1-5.1ubuntu12","2.20.1-5.1ubuntu13","2.20.1-5.1ubuntu14","2.20.1-5.1ubuntu15","2.20.1-5.1ubuntu16","2.20.1-5.1ubuntu17","2.20.1-5.1ubuntu18","2.20.1-5.1ubuntu19","2.20.1-5.1ubuntu20","2.20.1-5.1ubuntu20.1","2.20.1-5.1ubuntu20.2","2.20.1-5.1ubuntu20.3","2.20.1-5.1ubuntu20.4","2.20.1-5.1ubuntu20.6","2.20.1-5.1ubuntu20.7","2.20.1-5.1ubuntu20.9"],"ecosystem_specific":{"binaries":[{"binary_version":"1:2.20.1-5.1ubuntu20.9","binary_name":"bsdutils"},{"binary_version":"2.20.1-5.1ubuntu20.9","binary_name":"libblkid1"},{"binary_name":"libmount1","binary_version":"2.20.1-5.1ubuntu20.9"},{"binary_version":"2.20.1-5.1ubuntu20.9","binary_name":"libuuid1"},{"binary_name":"mount","binary_version":"2.20.1-5.1ubuntu20.9"},{"binary_name":"util-linux","binary_version":"2.20.1-5.1ubuntu20.9"},{"binary_name":"util-linux-locales","binary_version":"2.20.1-5.1ubuntu20.9"},{"binary_version":"2.20.1-5.1ubuntu20.9","binary_name":"uuid-runtime"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13595.json"}},{"package":{"name":"util-linux","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/util-linux?arch=source&distro=esm-infra%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.26.2-6ubuntu3","2.27-3ubuntu1","2.27.1-1ubuntu2","2.27.1-1ubuntu3","2.27.1-1ubuntu4","2.27.1-3ubuntu1","2.27.1-4ubuntu1","2.27.1-6ubuntu1","2.27.1-6ubuntu2","2.27.1-6ubuntu3","2.27.1-6ubuntu3.1","2.27.1-6ubuntu3.2","2.27.1-6ubuntu3.3","2.27.1-6ubuntu3.4","2.27.1-6ubuntu3.6","2.27.1-6ubuntu3.7","2.27.1-6ubuntu3.8","2.27.1-6ubuntu3.9","2.27.1-6ubuntu3.10","2.27.1-6ubuntu3.10+esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"1:2.27.1-6ubuntu3.10+esm2","binary_name":"bsdutils"},{"binary_name":"libblkid1","binary_version":"2.27.1-6ubuntu3.10+esm2"},{"binary_name":"libfdisk1","binary_version":"2.27.1-6ubuntu3.10+esm2"},{"binary_version":"2.27.1-6ubuntu3.10+esm2","binary_name":"libmount1"},{"binary_version":"2.27.1-6ubuntu3.10+esm2","binary_name":"libsmartcols1"},{"binary_version":"2.27.1-6ubuntu3.10+esm2","binary_name":"libuuid1"},{"binary_name":"mount","binary_version":"2.27.1-6ubuntu3.10+esm2"},{"binary_version":"2.27.1-6ubuntu3.10+esm2","binary_name":"util-linux"},{"binary_version":"2.27.1-6ubuntu3.10+esm2","binary_name":"util-linux-locales"},{"binary_name":"uuid-runtime","binary_version":"2.27.1-6ubuntu3.10+esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13595.json"}},{"package":{"name":"util-linux","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/util-linux?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.30.1-0ubuntu4","2.30.2-0.1ubuntu1","2.30.2-0.1ubuntu2","2.30.2-0.1ubuntu3","2.31.1-0.4ubuntu2","2.31.1-0.4ubuntu3","2.31.1-0.4ubuntu3.1","2.31.1-0.4ubuntu3.2","2.31.1-0.4ubuntu3.3","2.31.1-0.4ubuntu3.4","2.31.1-0.4ubuntu3.5","2.31.1-0.4ubuntu3.6","2.31.1-0.4ubuntu3.7"],"ecosystem_specific":{"binaries":[{"binary_name":"bsdutils","binary_version":"1:2.31.1-0.4ubuntu3.7"},{"binary_name":"fdisk","binary_version":"2.31.1-0.4ubuntu3.7"},{"binary_name":"libblkid1","binary_version":"2.31.1-0.4ubuntu3.7"},{"binary_name":"libfdisk1","binary_version":"2.31.1-0.4ubuntu3.7"},{"binary_version":"2.31.1-0.4ubuntu3.7","binary_name":"libmount1"},{"binary_version":"2.31.1-0.4ubuntu3.7","binary_name":"libsmartcols1"},{"binary_name":"libuuid1","binary_version":"2.31.1-0.4ubuntu3.7"},{"binary_name":"mount","binary_version":"2.31.1-0.4ubuntu3.7"},{"binary_version":"2.31.1-0.4ubuntu3.7","binary_name":"rfkill"},{"binary_version":"2.31.1-0.4ubuntu3.7","binary_name":"setpriv"},{"binary_name":"util-linux","binary_version":"2.31.1-0.4ubuntu3.7"},{"binary_version":"2.31.1-0.4ubuntu3.7","binary_name":"util-linux-locales"},{"binary_version":"2.31.1-0.4ubuntu3.7","binary_name":"uuid-runtime"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13595.json"}},{"package":{"name":"util-linux","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/util-linux?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