Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Hardened Images | - |
| Redhat | Openshift Container Platform | >= 4.0, <= 4.22.1 |
| Redhat | Enterprise Linux | 7.0 |
| Kernel | Util-Linux | < 2.42.2 |
Related Weaknesses (CWE)
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 TrackingVendor Advisory
- https://github.com/util-linux/util-linux/commit/c0186f14fbdb02f64c8e0ba701ce727ePatch
FAQ
What is CVE-2026-13595?
CVE-2026-13595 is a vulnerability with a CVSS score of 6.8 (MEDIUM). 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 ...
How severe is CVE-2026-13595?
CVE-2026-13595 has been rated MEDIUM with a CVSS base score of 6.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-13595?
Check the references section above for vendor advisories and patch information. Affected products include: Redhat Hardened Images, Redhat Openshift Container Platform, Redhat Enterprise Linux, Kernel Util-Linux.