# RHSA-2026:93461: util-linux security update

RHSA-2026:93461, released September 2, 2026, fixes 9 CVEs in util-linux (version 2.40.2-18.el10_2.20). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-93461
- Platform: Linux
- Released: Sep 2, 2026
- Priority: High (Closes CVE-2026-78408, high severity)
- CVEs: 9, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:93461

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [util-linux](https://patchblox.com/security/data/product/linux/util-linux.md) | RHEL 10 | 2.40.2-18.el10_2.20 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-78408](https://patchblox.com/security/data/cve/CVE-2026-78408.md) | High | Util-linux: util-linux: nsenter --join-cgroup leaks root cgroup migration authority | 8.0 | 0.0024 |  |
| [CVE-2026-76642](https://patchblox.com/security/data/cve/CVE-2026-76642.md) | High | util-linux libmount Privilege Escalation via Failed Mount Helper | 8.0 | 0.0022 |  |
| [CVE-2026-78410](https://patchblox.com/security/data/cve/CVE-2026-78410.md) | High | Util-linux: util-linux: restricted bind mounts do not pin the source, allowing x-mount.owner/group/mode redirection | 8.0 | 0.0020 |  |
| [CVE-2026-53615](https://patchblox.com/security/data/cve/CVE-2026-53615.md) | High | util-linux libblkid DOS extended-partition overflow produces invalid partition metadata | 8.0 | 0.0018 |  |
| [CVE-2026-53613](https://patchblox.com/security/data/cve/CVE-2026-53613.md) | High | util-linux mount target TOCTOU allows local privilege escalation | 8.0 | 0.0016 |  |
| [CVE-2026-27456](https://patchblox.com/security/data/cve/CVE-2026-27456.md) | High | util-linux: TOCTOU Race Condition in util-linux mount(8) - Loop Device Setup | 8.0 | 0.0016 |  |
| [CVE-2026-53612](https://patchblox.com/security/data/cve/CVE-2026-53612.md) | High | util-linux mount hook_owner TOCTOU allows local privilege escalation | 8.0 | 0.0015 |  |
| [CVE-2026-13595](https://patchblox.com/security/data/cve/CVE-2026-13595.md) | High | util-linux: A flaw was found in the libblkid library of util-linux | 8.0 | 0.0014 |  |
| [CVE-2026-53614](https://patchblox.com/security/data/cve/CVE-2026-53614.md) | High | util-linux LIBMOUNT_FORCE_MOUNT2 allows nosuid and noexec bypass | 8.0 | 0.0013 |  |

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Data as of 2026-11-07T18:46:35Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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