CVE-2026-13595
Last modified
CVE-2026-13595 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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. EPSS estimates a 0.13% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Hardened Images | All versions |
| Redhat | Openshift Container Platform | >= 4.0, <= 4.22.1 |
| Redhat | Enterprise Linux | 7.0 |
| Redhat | Enterprise Linux | 8.0 |
| Redhat | Enterprise Linux | 9.0 |
| Redhat | Enterprise Linux | 10.0 |
| Kernel | Util-Linux | < 2.42.2 |
References
- https://access.redhat.com/errata/RHSA-2026:26573Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-13595Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2494101Issue Tracking, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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