{"id":"CVE-2026-13595","summary":"Util-linux: util-linux: heap use-after-free in libblkid nested partition probing","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":"2026-07-09T04:01:14.089337595Z","published":"2026-06-29T08:06:09.059Z","database_specific":{"cwe_ids":["CWE-416"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/13xxx/CVE-2026-13595.json","cna_assigner":"redhat"},"references":[{"type":"WEB","url":"https://access.redhat.com/downloads/content/package-browser/"},{"type":"WEB","url":"https://catalog.redhat.com/software/containers/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:26573"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-13595"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/13xxx/CVE-2026-13595.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-13595"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2494101"},{"type":"FIX","url":"https://github.com/util-linux/util-linux/commit/c0186f14fbdb02f64c8e0ba701ce727ea764ff4c"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/util-linux/util-linux","events":[{"introduced":"0"},{"fixed":"f44509230b9f8224993b8c6157f85888359a64e1"},{"fixed":"c0186f14fbdb02f64c8e0ba701ce727ea764ff4c"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"2.42.2"}],"cpe":"cpe:2.3:a:kernel:util-linux:*:*:*:*:*:*:*:*","source":["CPE_RANGE","REFERENCES"]}}],"versions":["v2.42.1","v2.42","v2.42-rc2","v2.42-rc1","v2.43-devel","v2.42-start","v2.41-start","v2.41-devel","v2.40-rc1","v2.39","v2.39-rc3","v2.39-rc2","v2.39-rc1","v2.38","v2.38-rc4","v2.38-rc3","v2.38-rc2","v2.38-rc1","v2.37","v2.37-rc2","v2.37-rc1","v2.36","v2.36-rc2","v2.36-rc1","v2.35","v2.35-rc2","v2.35-rc1","v2.34","v2.34-rc2","v2.34-rc1","v2.33","v2.33-rc2","v2.33-rc1","v2.32","v2.32-rc2","v2.32-rc1","v2.31","v2.31-rc2","v2.31-rc1","v2.30","v2.30-rc2","v2.30-rc1","v2.29","v2.29-rc2","v2.29-rc1","v2.28","v2.28-rc2","v2.28-rc1","v2.27","v2.27-rc2","v2.27-rc1","v2.26","v2.26-rc2","v2.26-rc1","v2.25","v2.25-rc2","v2.25-rc1","v2.24","v2.24-rc2","v2.24-rc1","v2.23","v2.23-rc2","v2.23-rc1","v2.22","v2.22-rc2","v2.22-rc1","v2.21","v2.21-rc2","v2.21-rc1","v2.20","v2.20-rc2","v2.20-rc1","v2.19","v2.19-rc3","v2.19-rc2","v2.19-rc1","v2.18","v2.18-rc2","v2.18-rc1","v2.17","v2.17-rc3","v2.17-rc2","v2.17-rc1","v2.16","v2.16-rc2","v2.16-rc1","v2.15","v2.15-rc2","v2.15-rc1","v2.14","v2.14-rc3","v2.14-rc2","v2.14-rc1","v2.13","v2.13-rc3","v2.13-rc2","v2.13-rc1","v2.13-pre7","v2.13-pre6","v2.13-pre5","v2.13-pre4","v2.13-pre3","v2.13-pre2","v2.13-pre1","v2.12r","v2.12r-pre1","v2.12q","v2.12q-pre2","v2.12q-pre1","v2.12p","v2.12o","v2.12m","v2.12l","v2.12k","v2.12j","v2.12i","v2.12h","v2.12d","v2.12b","v2.12a","v2.12pre","v2.12","v2.11y","v2.11x","v2.11w","v2.11v","v2.11u","v2.11t","v2.11r","v2.11q","v2.11o","v2.11n","v2.11m","v2.11f","v2.11b","v2.10s","v2.10m","v2.10f","v2.9v","v2.9i","v2.8","v2.7.1","v2.5","v2.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-13595.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"}]}