{"id":"JLSEC-2026-1263","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":"2026-08-12T16:15:15.364543078Z","published":"2026-08-12T15:58:36.032Z","upstream":["CVE-2026-13595"],"database_specific":{"license":"CC-BY-4.0","sources":[{"modified":"2026-07-08T03:37:21.637Z","published":"2026-06-29T09:16:28.303Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-13595","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-13595","database_specific":{"status":"Analyzed"},"id":"CVE-2026-13595","imported":"2026-08-12T14:31:09.675Z"}]},"references":[{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:26573"},{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-13595"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2494101"},{"type":"WEB","url":"https://github.com/util-linux/util-linux/commit/c0186f14fbdb02f64c8e0ba701ce727ea764ff4c"}],"affected":[{"package":{"name":"Libmount_jll","ecosystem":"Julia","purl":"pkg:julia/Libmount_jll?uuid=4b2f31a3-9ecc-558c-b454-b3730dcb73e9"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1263.json"}},{"package":{"name":"util_linux_jll","ecosystem":"Julia","purl":"pkg:julia/util_linux_jll?uuid=a762b42e-dc87-5958-a639-9c9eec9c0153"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1263.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H","source":"NVD"}]}