# CVE-2026-78410

## Summary

- **CVE ID:** CVE-2026-78410
- **Severity:** HIGH
- **CVSS Score:** 7.8 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-367
- **Published:** Sep 2, 2026
- **Last Modified:** Sep 4, 2026

## Description

A flaw was found in util-linux. Restricted bind mounts take the source path from fstab but do not pin that source before the privileged mount. A local unprivileged user who can replace the authorized source or a writable ancestor can redirect SUID mount(8) to bind another host directory. If the fstab entry also sets X-mount.owner, X-mount.group, or X-mount.mode, root then changes ownership or mode on that redirected inode.

## Affected Products

- Red Hat — Red Hat Hardened Images (2.42.2-3.4.hum1)

## References

- [CNA](https://access.redhat.com/security/cve/CVE-2026-78410)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2522684)
- [CNA](https://github.com/util-linux/util-linux/security/advisories/GHSA-rh77-686x-2f2m)
- [CNA](https://access.redhat.com/errata/RHSA-2026:63162)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.10%
- **EPSS Percentile:** 0.8

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._