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Fencer Vulns
medium 4.6

CVE-2016-5011 json

The parse_dos_extended function in partitions/dos.c in the libblkid library in util-linux allows physically proximate attackers to cause a…

published 2017-04-11 9 y ago modified 2026-06-17 4 mo ago also EUVD-2016-5970

cvss
4.6
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits
0
none known

Summary

The parse_dos_extended function in partitions/dos.c in the libblkid library in util-linux allows physically proximate attackers to cause a denial of service (memory consumption) via a crafted MSDOS partition table with an extended partition boot record at zero offset.

Patch / fix

  • util-linux Debian 14, Debian 13, Debian 12 2.28.1-1

debian advisories DEBIAN-CVE-2016-5011

  • util-linux Ubuntu Pro 16.04 LTS 2.27.1-6ubuntu3.10+esm2

ubuntu advisories UBUNTU-CVE-2016-5011

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • util-linux RHEL 7 2.23.2-33.el7
  • uuidd RHEL 7 2.23.2-33.el7
  • libuuid RHEL 7 2.23.2-33.el7
  • libblkid RHEL 7 2.23.2-33.el7
  • libmount RHEL 7 2.23.2-33.el7

red hat advisories RHSA-2016:2605

  • util-linux SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +3 more 2.28-42.1
  • python-libmount SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +1 more 2.28-42.4
  • util-linux-systemd SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2, SLES 12 SP2 +1 more 2.28-42.3
  • util-linux SLES for SAP 12 SP1, SLES 12 SP1, SLED 12 SP1 +2 more 2.25-37.1
  • python-libmount SLES for SAP 12 SP1, SLES 12 SP1, SLED 12 SP1 2.25-37.1
  • util-linux-systemd SLES for SAP 12 SP1, SLES 12 SP1, SLED 12 SP1 2.25-37.1
  • util-linux SLES for SAP 12, SLES 12-LTSS 2.25-24.10.1
  • python-libmount SLES for SAP 12, SLES 12-LTSS 2.25-24.10.3

suse advisories SUSE-SU-2017:0553-1SUSE-SU-2016:2954-1SUSE-SU-2016:2764-1

  • util-linux openSUSE Tumbleweed 2.36.2-3.2

opensuse advisories openSUSE-SU-2024:11282-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-5011 updated cvss 4.6

util-linux: Extended partition loop in MBR partition table leads to DOS

  • Red Hat Enterprise Linux 5 util-linux Red Hat Enterprise Linux 6 uuidd, libuuid, libblkid, util-linux-ng
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Client (v. 7) uuidd 2.23.2-33.el7, libuuid 2.23.2-33.el7, libblkid 2.23.2-33.el7, libmount 2.23.2-33.el7, util-linux 2.23.2-33.el7 Red Hat Enterprise Linux Client Optional (v. 7) libuuid-devel 2.23.2-33.el7, libblkid-devel 2.23.2-33.el7, libmount-devel 2.23.2-33.el7, util-linux-debuginfo 2.23.2-33.el7 Red Hat Enterprise Linux ComputeNode (v. 7) uuidd 2.23.2-33.el7, libuuid 2.23.2-33.el7, libblkid 2.23.2-33.el7, libmount 2.23.2-33.el7, util-linux 2.23.2-33.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) libuuid-devel 2.23.2-33.el7, libblkid-devel 2.23.2-33.el7, libmount-devel 2.23.2-33.el7, util-linux-debuginfo 2.23.2-33.el7 Red Hat Enterprise Linux Server (v. 7) uuidd 2.23.2-33.el7, libuuid 2.23.2-33.el7, libblkid 2.23.2-33.el7, libmount 2.23.2-33.el7, util-linux 2.23.2-33.el7 Red Hat Enterprise Linux Server Optional (v. 7) libmount-devel 2.23.2-33.el7, util-linux-debuginfo 2.23.2-33.el7
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) uuidd 2.23.2-33.el7, libuuid 2.23.2-33.el7, libblkid 2.23.2-33.el7, libmount 2.23.2-33.el7, util-linux 2.23.2-33.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) libmount-devel 2.23.2-33.el7, util-linux-debuginfo 2.23.2-33.el7
    fixed: vendor fix RHSA-2016:2605

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.46% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 4.6 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.9 AV:L/AC:L/Au:N/C:N/I:N/A:C

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.