{"id":"USN-8702-1","summary":"util-linux vulnerabilities","details":"It was discovered that libblkid in util-linux had a heap use-after-free\nvulnerability during nested partition probing. An attacker who could\npresent a crafted block device image could possibly use this issue to\nobtain sensitive information or cause a denial of service. (CVE-2026-13595)\n\nIt was discovered that the mount utility in util-linux had a time-of-check-\ntime-of-use vulnerability when setting up loop devices. A local attacker\ncould possibly use this issue to obtain unauthorized read access to root-\nprotected files and block devices. (CVE-2026-27456)\n\nIt was discovered that the login utility in util-linux improperly\ncanonicalized hostnames when invoked with the -h option. A remote attacker\ncould possibly use this issue to bypass host-based access control rules.\nThis issue only affected Ubuntu 26.04 LTS. (CVE-2026-3184)\n\nIt was discovered that libmount in util-linux had a time-of-check-time-of-\nuse vulnerability in its ownership hook. A local attacker could possibly\nuse this issue to gain elevated privileges. This issue only affected Ubuntu\n24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-53612)\n\nIt was discovered that libmount in util-linux had a time-of-check-time-of-\nuse vulnerability that allowed target path redirection during mount\noperations. A local attacker could possibly use this issue to gain elevated\nprivileges. (CVE-2026-53613)\n\nIt was discovered that libmount in util-linux improperly handled the\nLIBMOUNT_FORCE_MOUNT2 environment variable in the SUID mount utility. A\nlocal attacker could possibly use this issue to bypass nosuid and noexec\nmount options and gain elevated privileges. This issue only affected Ubuntu\n24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-53614)\n\nIt was discovered that libblkid in util-linux had an integer overflow\nvulnerability when parsing DOS partition tables. An attacker who could\npresent a crafted block device image could possibly use this issue to cause\na denial of service. (CVE-2026-53615)","modified":"2026-08-31T22:26:23.131361662Z","published":"2026-08-31T12:39:05Z","related":["UBUNTU-CVE-2026-13595","UBUNTU-CVE-2026-27456","UBUNTU-CVE-2026-3184","UBUNTU-CVE-2026-53612","UBUNTU-CVE-2026-53613","UBUNTU-CVE-2026-53614","UBUNTU-CVE-2026-53615"],"upstream":["CVE-2026-13595","CVE-2026-27456","CVE-2026-3184","CVE-2026-53612","CVE-2026-53613","CVE-2026-53614","CVE-2026-53615","UBUNTU-CVE-2026-13595","UBUNTU-CVE-2026-27456","UBUNTU-CVE-2026-3184","UBUNTU-CVE-2026-53612","UBUNTU-CVE-2026-53613","UBUNTU-CVE-2026-53614","UBUNTU-CVE-2026-53615"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8702-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-3184"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-13595"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-27456"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-53612"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-53613"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-53614"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-53615"}],"affected":[{"package":{"name":"util-linux","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/util-linux?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.37.2-4ubuntu3.6"}]}],"versions":["2.36.1-8ubuntu1","2.37.2-4ubuntu1","2.37.2-4ubuntu2","2.37.2-4ubuntu3","2.37.2-4ubuntu3.3","2.37.2-4ubuntu3.4","2.37.2-4ubuntu3.5"],"ecosystem_specific":{"binaries":[{"binary_name":"bsdextrautils","binary_version":"2.37.2-4ubuntu3.6"},{"binary_version":"1:2.37.2-4ubuntu3.6","binary_name":"bsdutils"},{"binary_version":"2.37.2-4ubuntu3.6","binary_name":"eject"},{"binary_version":"2.37.2-4ubuntu3.6","binary_name":"fdisk"},{"binary_name":"libblkid1","binary_version":"2.37.2-4ubuntu3.6"},{"binary_name":"libfdisk1","binary_version":"2.37.2-4ubuntu3.6"},{"binary_version":"2.37.2-4ubuntu3.6","binary_name":"libmount1"},{"binary_name":"libsmartcols1","binary_version":"2.37.2-4ubuntu3.6"},{"binary_name":"libuuid1","binary_version":"2.37.2-4ubuntu3.6"},{"binary_version":"2.37.2-4ubuntu3.6","binary_name":"mount"},{"binary_name":"rfkill","binary_version":"2.37.2-4ubuntu3.6"},{"binary_version":"2.37.2-4ubuntu3.6","binary_name":"util-linux"},{"binary_name":"util-linux-locales","binary_version":"2.37.2-4ubuntu3.6"},{"binary_version":"2.37.2-4ubuntu3.6","binary_name":"uuid-runtime"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-13595"},{"id":"CVE-2026-27456","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]},{"severity":[{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-53613"},{"severity":[{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-53615"}],"ecosystem":"Ubuntu:22.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8702-1.json"}},{"package":{"name":"util-linux","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/util-linux?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.39.3-9ubuntu6.6"}]}],"versions":["2.39.1-4ubuntu2","2.39.2-6ubuntu1","2.39.3-6ubuntu2","2.39.3-9ubuntu2","2.39.3-9ubuntu4","2.39.3-9ubuntu6","2.39.3-9ubuntu6.1","2.39.3-9ubuntu6.2","2.39.3-9ubuntu6.3","2.39.3-9ubuntu6.4","2.39.3-9ubuntu6.5"],"ecosystem_specific":{"availability":"No 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