7.8

CVE-2026-78410

Medienbericht

Util-linux: util-linux: restricted bind mounts do not pin the source, allowing x-mount.owner/group/mode redirection

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerRed Hat
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Produkt Red Hat Hardened Images
Default Statusaffected
Version 2.42.2-3.4.hum1
Version < *
Status unaffected
HerstellerRed Hat
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Produkt Red Hat Enterprise Linux 10
Default Statusaffected
HerstellerRed Hat
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Produkt Red Hat Enterprise Linux 7
Default Statusunaffected
HerstellerRed Hat
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Produkt Red Hat Enterprise Linux 8
Default Statusunaffected
HerstellerRed Hat
≫
Produkt Red Hat Enterprise Linux 9
Default Statusunaffected
HerstellerRed Hat
≫
Produkt Red Hat Enterprise Linux 9
Default Statusunaffected
HerstellerRed Hat
≫
Produkt Red Hat Enterprise Linux 9
Default Statusunaffected
HerstellerRed Hat
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Produkt Red Hat OpenShift Container Platform 4
Default Statusunaffected
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.1% 0.008
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
RedHat 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition

The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.

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Media Report
08.09.2026 20:38
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
https://access.redhat.com/errata/RHSA-2026:63162