Util-linux: util-linux: heap use-after-free in libblkid nested partition probing
CVSS score
6.8
EPSS probability
%0.2
Risk score
0.0
Published
3 mo ago
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Vulnerability description
DayBreach CVE AI Research
CVE-2026-13595 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.
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.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-13595 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | Red Hat | Red Hat Hardened Images | View |
| 2 | Red Hat | Red Hat Enterprise Linux 10 | View |
| 3 | Red Hat | Red Hat Enterprise Linux 7 | View |
| 4 | Red Hat | Red Hat Enterprise Linux 8 | View |
| 5 | Red Hat | Red Hat Enterprise Linux 9 | View |
| 6 | Red Hat | Red Hat OpenShift Container Platform 4 | View |
| 7 | redhat | hardened images | View |
| 8 | redhat | openshift container platform | View |
| 9 | redhat | enterprise linux | View |
| 10 | redhat | enterprise linux | View |
| 11 | redhat | enterprise linux | View |
| 12 | redhat | enterprise linux | View |
| 13 | kernel | util-linux | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 6.8 | CVSS V31 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H | NVD |
| 6.8 | CVSS V3_1 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H | CVE CNA |
| 6.8 | CVSS 3.x | — | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H | Microsoft MSRC |
| 5.3 | CVSS V31 | MEDIUM | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H | NVD |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-13595 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-13595 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
Similar Vulnerabilities
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