CVE-2026-13595
Description
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.
AI Insight
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Affected products
27- osv-coords19 versionspkg:rpm/almalinux/uuiddpkg:rpm/almalinux/libsmartcolspkg:rpm/opensuse/util-linux&distro=openSUSE%20Tumbleweedpkg:rpm/almalinux/libuuid-develpkg:rpm/almalinux/python3-libmountpkg:rpm/almalinux/util-linuxpkg:rpm/almalinux/util-linux-corepkg:rpm/almalinux/libuuidpkg:rpm/almalinux/libsmartcols-develpkg:rpm/opensuse/python-libmount&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/util-linux&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/util-linux-userpkg:rpm/opensuse/util-linux-systemd&distro=openSUSE%20Leap%2016.0pkg:rpm/almalinux/libblkidpkg:rpm/almalinux/libblkid-develpkg:rpm/almalinux/libfdiskpkg:rpm/almalinux/libfdisk-develpkg:rpm/almalinux/libmountpkg:rpm/almalinux/libmount-devel
< 2.40.2-18.el10_2.20+ 18 more
- (no CPE)range: < 2.40.2-18.el10_2.20
- (no CPE)range: < 2.40.2-18.el10_2.20
- (no CPE)range: < 2.42.2-1.1
- (no CPE)range: < 2.40.2-18.el10_2.20
- (no CPE)range: < 2.40.2-18.el10_2.20
- (no CPE)range: < 2.40.2-18.el10_2.20
- (no CPE)range: < 2.40.2-18.el10_2.20
- (no CPE)range: < 2.40.2-18.el10_2.20
- (no CPE)range: < 2.40.2-18.el10_2.20
- (no CPE)range: < 2.41.1-160000.5.1
- (no CPE)range: < 2.41.1-160000.5.1
- (no CPE)range: < 2.32.1-50.el8_10
- (no CPE)range: < 2.41.1-160000.5.1
- (no CPE)range: < 2.40.2-18.el10_2.20
- (no CPE)range: < 2.40.2-18.el10_2.20
- (no CPE)range: < 2.40.2-18.el10_2.20
- (no CPE)range: < 2.40.2-18.el10_2.20
- (no CPE)range: < 2.40.2-18.el10_2.20
- (no CPE)range: < 2.40.2-18.el10_2.20
- cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openshift_container_platform:*:*:*:*:*:*:*:*Range: >=4.0,<=4.22.1
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*+ 3 more
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
7- github.com/util-linux/util-linux/commit/c0186f14fbdb02f64c8e0ba701ce727ea764ff4cnvdPatch
- access.redhat.com/errata/RHSA-2026:26573nvdVendor Advisory
- access.redhat.com/security/cve/CVE-2026-13595nvdVendor Advisory
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingVendor Advisory
- access.redhat.com/errata/RHSA-2026:93461nvd
- access.redhat.com/errata/RHSA-2026:95365nvd
- access.redhat.com/errata/RHSA-2026:96212nvd
News mentions
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