CVE-2026-13595
Util-linux: util-linux: heap use-after-free in libblkid nested partition probing
En bref
- Sévérité
- MEDIUM 6.8
- EPSS
- EPSS 0.14 % · centile 4 (2026-10-27)
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- redhat
- Statut NVD
- Analyzed
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.
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 6.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H | redhat |
| CVSS 3.1 | MEDIUM 6.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H | NVD · secalert@redhat.com (Secondary) |
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H | NVD · nvd@nist.gov (Primary) |
Faiblesses (CWE)
Références européennes
- ENISA EUVD · EUVD-2026-40053
- GCVE · GCVE-0-2026-13595
Avis du CERT-FR
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1249 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1068 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0841 — Multiples vulnérabilités dans Microsoft Azure Linux · cert.ssi.gouv.fr
Configurations affectées (CPE NVD)
cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*cpe:2.3:a:redhat:openshift_container_platform:*:*:*:*:*:*:*:*≥ 4.0 ≤ 4.22.1cpe: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:*:*:*:*:*:*:*cpe:2.3:a:kernel:util-linux:*:*:*:*:*:*:*:*< 2.42.2
Produits affectés
Références
- https://access.redhat.com/errata/RHSA-2026:26573
- https://access.redhat.com/security/cve/CVE-2026-13595
- https://bugzilla.redhat.com/show_bug.cgi?id=2494101
- https://github.com/util-linux/util-linux/commit/c0186f14fbdb02f64c8e0ba701ce727ea764ff4c
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |