CVE-2026-78410

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 99% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this weekElevated
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: Elevated riskExposed: 0

A fix is available — apply it.

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.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
51(Track*)
EG Risk 51/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
1%
KEV
Not listed

Published

September 2, 2026

Last Modified

September 4, 2026

Advisory Details (3)

Auto-updated Sep 2, 2026
🔬 Proof of concept available. Patch available. Sources: redhat, github.
github Patch Available🟡 PoC Available

Restricted bind mounts do not pin the source, allowing `X-mount.owner/group/mode` redirection · Advisory · util-linux/util-linux · GitHub

https://github.com/util-linux/util-linux/security/advisories/GHSA-rh77-686x-2f2m
redhat

2522684 – (CVE-2026-78410) CVE-2026-78410 util-linux: util-linux: restricted bind mounts do not pin the source, allowing X-mount.owner/group/mode redirection

https://bugzilla.redhat.com/show_bug.cgi?id=2522684
redhat Patch Available

CVE-2026-78410 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-78410

Vendor Advisories for CVE-2026-78410(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatutil-linux-main-2.42.2-3.4.hum12026-09-03redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(6 across 6 ecosystems)
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
util-linux—2.41.6-r0—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
util-linux—2.41.6-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
util-linux—2.42.3-r0—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
util-linux2.38.1-5 ... 2.42~rc2-1 (119 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
util-linux2.41-5 ... 2.42~rc2-1 (35 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
util-linux2.41-5 ... 2.42~rc2-1 (34 versions)——

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 27× in last 7d / 68× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 11:42 UTCVendor advisory
  2. 2026-09-19 00:47 UTCEG score recompute
  3. 2026-09-19 00:47 UTCVendor advisory
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 13:57 UTCVendor advisory
  6. 2026-09-18 03:04 UTCEG score recompute
  7. 2026-09-18 03:04 UTCVendor advisory
  8. 2026-09-17 16:15 UTCVendor advisory
  9. 2026-09-17 05:26 UTCVendor advisory
  10. 2026-09-16 18:36 UTCEG score recompute
  11. 2026-09-16 18:36 UTCVendor advisory
  12. 2026-09-16 14:08 UTCEPSS rescore
  13. 2026-09-16 07:03 UTCEG score recompute
  14. 2026-09-16 07:03 UTCVendor advisory
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-15 20:13 UTCVendor advisory
  17. 2026-09-15 09:24 UTCEG score recompute
  18. 2026-09-15 09:24 UTCVendor advisory
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-15 03:12 UTCEPSS rescore
  21. 2026-09-14 22:35 UTCVendor advisory
  22. 2026-09-14 11:45 UTCVendor advisory
  23. 2026-09-14 00:56 UTCVendor advisory
  24. 2026-09-13 14:07 UTCVendor advisory
  25. 2026-09-13 03:18 UTCVendor advisory
Show 43 more
  1. 2026-09-12 16:28 UTCEG score recompute
  2. 2026-09-12 16:28 UTCVendor advisory
  3. 2026-09-12 05:39 UTCVendor advisory
  4. 2026-09-11 18:50 UTCEG score recompute
  5. 2026-09-11 18:50 UTCVendor advisory
  6. 2026-09-11 14:53 UTCEPSS rescore
  7. 2026-09-11 14:53 UTCEPSS rescore
  8. 2026-09-11 07:59 UTCVendor advisory
  9. 2026-09-10 21:10 UTCVendor advisory
  10. 2026-09-10 10:21 UTCEG score recompute
  11. 2026-09-10 10:21 UTCVendor advisory
  12. 2026-09-10 09:35 UTCEPSS rescore
  13. 2026-09-09 23:32 UTCVendor advisory
  14. 2026-09-09 10:31 UTCVendor advisory
  15. 2026-09-08 23:34 UTCEG score recompute
  16. 2026-09-08 23:34 UTCVendor advisory
  17. 2026-09-08 22:01 UTCEPSS rescore
  18. 2026-09-08 12:44 UTCVendor advisory
  19. 2026-09-08 01:40 UTCEG score recompute
  20. 2026-09-08 01:40 UTCVendor advisory
  21. 2026-09-07 14:52 UTCVendor advisory
  22. 2026-09-07 01:29 UTCVendor advisory
  23. 2026-09-06 14:39 UTCEG score recompute
  24. 2026-09-06 14:39 UTCVendor advisory
  25. 2026-09-06 13:48 UTCEPSS rescore
  26. 2026-09-06 03:50 UTCVendor advisory
  27. 2026-09-05 17:01 UTCEG score recompute
  28. 2026-09-05 17:01 UTCVendor advisory
  29. 2026-09-05 06:11 UTCVendor advisory
  30. 2026-09-04 19:22 UTCEG score recompute
  31. 2026-09-04 19:22 UTCVendor advisory
  32. 2026-09-04 18:49 UTCEG score recompute
  33. 2026-09-04 18:49 UTCVendor advisory
  34. 2026-09-04 16:09 UTCEG score recompute
  35. 2026-09-04 16:09 UTCVendor advisory
  36. 2026-09-04 05:16 UTCEG score recompute
  37. 2026-09-04 05:16 UTCVendor advisory
  38. 2026-09-04 05:07 UTCEPSS rescore
  39. 2026-09-03 13:16 UTCEG score recompute
  40. 2026-09-03 13:02 UTCEG score recompute
  41. 2026-09-02 16:38 UTCEG score recompute
  42. 2026-09-02 15:27 UTCEG score recompute
  43. 2026-09-02 15:26 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-78410?
CVE-2026-78410 is a high vulnerability published on September 2, 2026. 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…
When was CVE-2026-78410 disclosed?
CVE-2026-78410 was first published in the National Vulnerability Database on September 2, 2026, with the most recent update on September 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78410 actively exploited?
CVE-2026-78410 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 99.2% of all scored CVEs.
What is the CVSS score of CVE-2026-78410?
CVE-2026-78410 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-78410?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78410, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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