OESA-2026-3978

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Source
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-3978
Import Source
https://repo.openeuler.org/security/data/osv/OESA-2026-3978.json
JSON Data
https://api.osv.dev/v1/vulns/OESA-2026-3978
Upstream
CVE (2)
  • CVE-2026-53613
  • CVE-2026-78410
Published
2026-09-20T13:23:45Z
Modified
2026-09-20T13:30:31Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
util-linux security update
Details

The util-linux package contains a random collection of files that implements some low-level basic linux utilities.

Security Fix(es):

When an /etc/fstab entry is configured with the user or users option, mount(8) validates the target path before performing the mount syscall, creating a Time-of-Check-Time-of-Use (TOCTOU) window. A local unprivileged user with write access to an ancestor directory of the mount target can swap that directory to redirect the mount to an arbitrary root-owned location, potentially escalating privileges to root.(CVE-2026-53613)

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.(CVE-2026-78410)

Database specific 
{
    "severity":  "High"
}
References

Affected packages

openEuler:20.03-LTS-SP4 / util-linux

Package

Name
util-linux
Purl
pkg:rpm/openEuler/util-linux&distro=openEuler-20.03-LTS-SP4

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.35.2-35.oe2003sp4

Ecosystem specific 

{
    "aarch64":  [
        "libblkid-2.35.2-35.oe2003sp4.aarch64.rpm",
        "libfdisk-2.35.2-35.oe2003sp4.aarch64.rpm",
        "libmount-2.35.2-35.oe2003sp4.aarch64.rpm",
        "libsmartcols-2.35.2-35.oe2003sp4.aarch64.rpm",
        "libuuid-2.35.2-35.oe2003sp4.aarch64.rpm",
        "python-libmount-2.35.2-35.oe2003sp4.aarch64.rpm",
        "util-linux-2.35.2-35.oe2003sp4.aarch64.rpm",
        "util-linux-debuginfo-2.35.2-35.oe2003sp4.aarch64.rpm",
        "util-linux-debugsource-2.35.2-35.oe2003sp4.aarch64.rpm",
        "util-linux-devel-2.35.2-35.oe2003sp4.aarch64.rpm",
        "util-linux-user-2.35.2-35.oe2003sp4.aarch64.rpm",
        "uuidd-2.35.2-35.oe2003sp4.aarch64.rpm"
    ],
    "noarch":  [
        "util-linux-help-2.35.2-35.oe2003sp4.noarch.rpm"
    ],
    "src":  [
        "util-linux-2.35.2-35.oe2003sp4.src.rpm"
    ],
    "x86_64":  [
        "libblkid-2.35.2-35.oe2003sp4.x86_64.rpm",
        "libfdisk-2.35.2-35.oe2003sp4.x86_64.rpm",
        "libmount-2.35.2-35.oe2003sp4.x86_64.rpm",
        "libsmartcols-2.35.2-35.oe2003sp4.x86_64.rpm",
        "libuuid-2.35.2-35.oe2003sp4.x86_64.rpm",
        "python-libmount-2.35.2-35.oe2003sp4.x86_64.rpm",
        "util-linux-2.35.2-35.oe2003sp4.x86_64.rpm",
        "util-linux-debuginfo-2.35.2-35.oe2003sp4.x86_64.rpm",
        "util-linux-debugsource-2.35.2-35.oe2003sp4.x86_64.rpm",
        "util-linux-devel-2.35.2-35.oe2003sp4.x86_64.rpm",
        "util-linux-user-2.35.2-35.oe2003sp4.x86_64.rpm",
        "uuidd-2.35.2-35.oe2003sp4.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-3978.json"