CVE-2026-13595Util-linux: util-linux: heap use-after-free in libblkid nested partition probing
- 6.8MediumCVSS base score
- 0.15%Exploitation in 30 daysEPSS · top 96% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By redhat
Published
- 5 months later
· 5 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.1 | Medium6.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.3 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.15% · top 96% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.8.
Affected products
Red Hat · Red Hat Enterprise Linux 10
- unaffected 0:2.40.2-18.el10_2.20 – < *
Red Hat · Red Hat Enterprise Linux 8
- unaffected 0:2.32.1-50.el8_10 – < *
Red Hat · Red Hat Enterprise Linux 8
- unaffected 0:2.32.1-50.el8_10 – < *
Red Hat · Red Hat Enterprise Linux 9
- unaffected 0:2.37.4-28.el9_9 – < *
Red Hat · Red Hat Enterprise Linux 9
- unaffected 0:2.37.4-28.el9_9 – < *
Red Hat · Red Hat Enterprise Linux 9.8 Extended Update Support
- unaffected 0:2.37.4-25.el9_8.2 – < *
Red Hat · Red Hat Cost Management On-Premise 1
- unaffected 1793825318 – < *
Red Hat · Red Hat Hardened Images
- unaffected 2.42.2-1.hum1 – < *
Red Hat · Red Hat Enterprise Linux 7
All versions: affected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unknown
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
Red Hat · Red Hat OpenShift Container Platform 4
All versions: affected
Red Hat · Red Hat OpenShift Container Platform 4
All versions: affected
Red Hat · Red Hat OpenShift Container Platform 5
All versions: affected
What to do
Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
References
References9
- RHSA-2026:26573 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:93461 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:95365 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:96212 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:97522 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:99119 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-13595 (opens in a new tab)vdb-entryx_refsource_REDHAT
- RHBZ#2494101 (opens in a new tab)issue-trackingx_refsource_REDHAT
- https://github.com/util-linux/util-linux/commit/c0186f14fbdb02f64c8e0ba701ce727ea764ff4c (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-40053 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-13595)Record last updated .