Util-linux: util-linux: restricted bind mounts do not pin the source, allowing x-mount.owner/group/mode redirection
Products / packages Red Hat Enterprise Linux 10 · Red Hat Cost Management On-Premise 1 · Red Hat Hardened Images · 5 more
Published
Severity and exploitation
KEV coverage does not rule out exploitation.
Assessment vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HSeverity
high7.8CVSS measures technical severity, not the likelihood of an attack.
Known exploitation
Not listed in the checked CISA KEV catalog
Absence from CISA KEV does not rule out attacks.
Public exploit
Exploit reference published
Source-linked evidence; not proof of attacks in the wild or independent validation.
Remediation
Source guidance available
Review the recorded instructions. Guidance may be a workaround rather than a fixed version.
What this means
A flaw in util-linux allows a local unprivileged user to redirect SUID mount(8) to bind another host directory if they can replace the authorized source or a writable ancestor. The vulnerability affects restricted bind mounts that do not pin the source path from fstab. If the fstab entry sets X-mount.owner, X-mount.group, or X-mount.mode, root may change ownership or mode on the redirected inode.
Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.Attack conditions
No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.
Review supporting sources →Affected versions
Check the exact model, release, and any platform requirements against your installation.
Red Hat · redhat
Red Hat Enterprise Linux 10
1 range
Red Hat · redhat
Red Hat Enterprise Linux 10
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unaffected
0:2.40.2-18.el10_2.20 → before *
rpm versions
Other versions: affected
Product identifiers (CPE)
cpe:/o:redhat:enterprise_linux:10.2Red Hat · redhat
Red Hat Cost Management On-Premise 1
1 range
Red Hat · redhat
Red Hat Cost Management On-Premise 1
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unaffected
1793825318 → before *
rpm versions
Other versions: affected
Product identifiers (CPE)
cpe:/a:redhat:cost_management_on_premise:1::el10Red Hat · redhat
Red Hat Hardened Images
1 range
Red Hat · redhat
Red Hat Hardened Images
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unaffected
2.42.2-3.4.hum1 → before *
rpm versions
Other versions: affected
Product identifiers (CPE)
cpe:/a:redhat:hummingbird:1Red Hat · redhat
Red Hat Enterprise Linux 7
0 ranges
Red Hat · redhat
Red Hat Enterprise Linux 7
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Other versions: unaffected
Product identifiers (CPE)
cpe:/o:redhat:rhel_els:7Red Hat · redhat
Red Hat Enterprise Linux 8
0 ranges
Red Hat · redhat
Red Hat Enterprise Linux 8
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Other versions: unaffected
Product identifiers (CPE)
cpe:/a:redhat:enterprise_linux:8Red Hat · redhat
Red Hat Enterprise Linux 9
0 ranges
Red Hat · redhat
Red Hat Enterprise Linux 9
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Other versions: unaffected
Product identifiers (CPE)
cpe:/a:redhat:enterprise_linux:9Red Hat · redhat
Red Hat Enterprise Linux 9
0 ranges
Red Hat · redhat
Red Hat Enterprise Linux 9
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Other versions: unaffected
Product identifiers (CPE)
cpe:/a:redhat:enterprise_linux:9Red Hat · redhat
Red Hat Enterprise Linux 9
0 ranges
Red Hat · redhat
Red Hat Enterprise Linux 9
Compare with this publisher’s ranges. This does not inspect your installation.
Other versions: unaffected
Product identifiers (CPE)
cpe:/a:redhat:enterprise_linux:9Red Hat · redhat
Red Hat OpenShift Container Platform 4
0 ranges
Red Hat · redhat
Red Hat OpenShift Container Platform 4
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Other versions: unaffected
Product identifiers (CPE)
cpe:/a:redhat:openshift:4Red Hat · redhat
Red Hat OpenShift Container Platform 4
0 ranges
Red Hat · redhat
Red Hat OpenShift Container Platform 4
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Other versions: unaffected
Product identifiers (CPE)
cpe:/a:redhat:openshift:4Red Hat · redhat
Red Hat OpenShift Container Platform 5
0 ranges
Red Hat · redhat
Red Hat OpenShift Container Platform 5
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Other versions: unaffected
Product identifiers (CPE)
cpe:/a:redhat:openshift:5What to do
Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.
Upgrade to util-linux v2.41.6, v2.42.3, or later. Until a fix is applied, do not allow unprivileged /etc/fstab bind or rbind entries that also specify X-mount.owner, X-mount.group, or X-mount.mode, especially when the bind source is below a user-writable ancestor.
cve.new guidance unless attributed to a publisher. This page does not inspect your installation.
Public exploit evidence
The sources identify public exploit references. We have not independently tested them; their availability does not establish exploitation in the wild.
util-linux/util-linux · security/advisories/GHSA-rh77-686x-2f2m ↗Attributed to CISA-ADPOriginal source description
Read the full publisher 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.
References
6 sourcesInside the record
Evidence available
Describes the evidence in this view, not whether the product is safe.
Original records
CVE-2026-78410View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.
cve.new JSON →Underlying weaknesses
The source’s classification of what caused the vulnerability.
Contributing organizations · 2
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Additional data publisher
Timeline
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Publication date supplied by the source.
Source updated
Latest modification date supplied by the source.
Last imported by cve.new
Latest catalog import, not the date we first saw this advisory.
What changed
Follow changes- CVE · CVE-2026-78410
Observed 2026-11-05T03:15:21.764Z · upstream updated 2026-11-05T02:43:54.671Z
Product or version evidence changed
before
[ { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 10", "platforms": [], "versions": [ { "version": "0:2.40.2-18.el10_2.20", "status": "unaffected", "lessThan": "*", "versionType": "rpm" } ], "defaultStatus": "affected", "cpes": [ "cpe:/o:redhat:enterprise_linux:10.2" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Hardened Images", "platforms": [], "versions": [ { "version": "2.42.2-3.4.hum1", "status": "unaffected", "lessThan": "*", "versionType": "rpm" } ], "defaultStatus": "affected", "cpes": [ "cpe:/a:redhat:hummingbird:1" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 7", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/o:redhat:enterprise_linux:7" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 8", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/o:redhat:enterprise_linux:8" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 9", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/o:redhat:enterprise_linux:9" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 9", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/o:redhat:enterprise_linux:9" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 9", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/o:redhat:enterprise_linux:9" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat OpenShift Container Platform 4", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:openshift:4" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat OpenShift Container Platform 4", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:openshift:4" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat OpenShift Container Platform 5", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:openshift:5" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" } ]after
[ { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 10", "platforms": [], "versions": [ { "version": "0:2.40.2-18.el10_2.20", "status": "unaffected", "lessThan": "*", "versionType": "rpm" } ], "defaultStatus": "affected", "cpes": [ "cpe:/o:redhat:enterprise_linux:10.2" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Cost Management On-Premise 1", "platforms": [], "versions": [ { "version": "1793825318", "status": "unaffected", "lessThan": "*", "versionType": "rpm" } ], "defaultStatus": "affected", "cpes": [ "cpe:/a:redhat:cost_management_on_premise:1::el10" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Hardened Images", "platforms": [], "versions": [ { "version": "2.42.2-3.4.hum1", "status": "unaffected", "lessThan": "*", "versionType": "rpm" } ], "defaultStatus": "affected", "cpes": [ "cpe:/a:redhat:hummingbird:1" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 7", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/o:redhat:rhel_els:7" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 8", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:enterprise_linux:8" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 9", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:enterprise_linux:9" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 9", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:enterprise_linux:9" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 9", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:enterprise_linux:9" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat OpenShift Container Platform 4", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:openshift:4" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat OpenShift Container Platform 4", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:openshift:4" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat OpenShift Container Platform 5", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:openshift:5" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" } ]References changed
before
[ "https://access.redhat.com/errata/RHSA-2026:63162", "https://access.redhat.com/errata/RHSA-2026:93461", "https://access.redhat.com/security/cve/CVE-2026-78410", "https://bugzilla.redhat.com/show_bug.cgi?id=2522684", "https://github.com/util-linux/util-linux/security/advisories/GHSA-rh77-686x-2f2m" ]
after
[ "https://access.redhat.com/errata/RHSA-2026:63162", "https://access.redhat.com/errata/RHSA-2026:93461", "https://access.redhat.com/errata/RHSA-2026:95365", "https://access.redhat.com/security/cve/CVE-2026-78410", "https://bugzilla.redhat.com/show_bug.cgi?id=2522684", "https://github.com/util-linux/util-linux/security/advisories/GHSA-rh77-686x-2f2m" ]
- CVE · CVE-2026-78410
Observed 2026-11-02T05:30:44.574Z · upstream updated 2026-11-02T05:16:11.799Z
Product or version evidence changed
before
[ { "vendor": "Red Hat", "name": "Red Hat Hardened Images", "platforms": [], "versions": [ { "version": "2.42.2-3.4.hum1", "status": "unaffected", "lessThan": "*", "versionType": "rpm" } ], "defaultStatus": "affected", "cpes": [ "cpe:/a:redhat:hummingbird:1" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 10", "platforms": [], "versions": [], "defaultStatus": "affected", "cpes": [ "cpe:/o:redhat:enterprise_linux:10" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 7", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/o:redhat:enterprise_linux:7" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 8", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/o:redhat:enterprise_linux:8" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 9", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/o:redhat:enterprise_linux:9" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 9", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/o:redhat:enterprise_linux:9" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 9", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/o:redhat:enterprise_linux:9" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat OpenShift Container Platform 4", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:openshift:4" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat OpenShift Container Platform 4", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:openshift:4" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat OpenShift Container Platform 5", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:openshift:5" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" } ]after
[ { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 10", "platforms": [], "versions": [ { "version": "0:2.40.2-18.el10_2.20", "status": "unaffected", "lessThan": "*", "versionType": "rpm" } ], "defaultStatus": "affected", "cpes": [ "cpe:/o:redhat:enterprise_linux:10.2" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Hardened Images", "platforms": [], "versions": [ { "version": "2.42.2-3.4.hum1", "status": "unaffected", "lessThan": "*", "versionType": "rpm" } ], "defaultStatus": "affected", "cpes": [ "cpe:/a:redhat:hummingbird:1" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 7", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/o:redhat:enterprise_linux:7" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 8", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/o:redhat:enterprise_linux:8" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 9", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/o:redhat:enterprise_linux:9" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 9", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/o:redhat:enterprise_linux:9" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 9", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/o:redhat:enterprise_linux:9" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat OpenShift Container Platform 4", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:openshift:4" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat OpenShift Container Platform 4", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:openshift:4" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" }, { "vendor": "Red Hat", "name": "Red Hat OpenShift Container Platform 5", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:openshift:5" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-78410" } ]References changed
before
[ "https://access.redhat.com/errata/RHSA-2026:63162", "https://access.redhat.com/security/cve/CVE-2026-78410", "https://bugzilla.redhat.com/show_bug.cgi?id=2522684", "https://github.com/util-linux/util-linux/security/advisories/GHSA-rh77-686x-2f2m" ]
after
[ "https://access.redhat.com/errata/RHSA-2026:63162", "https://access.redhat.com/errata/RHSA-2026:93461", "https://access.redhat.com/security/cve/CVE-2026-78410", "https://bugzilla.redhat.com/show_bug.cgi?id=2522684", "https://github.com/util-linux/util-linux/security/advisories/GHSA-rh77-686x-2f2m" ]
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