The parse_dos_extended function in partitions/dos.c in the libblkid library in util-linux allows physically proximate attackers to cause a d
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.
Noroxi analysis
No Noroxi analysis for this record yet
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We use this product, ask for help- Published
- Apr 11, 2017
- Updated
- Jun 16, 2026
- EPSS
- 0.5% · 38th percentile
- CWE
- —
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Report tools
Action score
18
Monitor
Low priority for now.
- CVSS
- 18 / 40 · 4.6 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.5%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| kernel | util-linux | cpe:2.3:a:kernel:util-linux |
| redhat | enterprise linux desktop | cpe:2.3:o:redhat:enterprise_linux_desktop |
| redhat | enterprise linux eus | cpe:2.3:o:redhat:enterprise_linux_eus |
| redhat | enterprise linux server | cpe:2.3:o:redhat:enterprise_linux_server |
| redhat | enterprise linux server aus | cpe:2.3:o:redhat:enterprise_linux_server_aus |
| redhat | enterprise linux server tus | cpe:2.3:o:redhat:enterprise_linux_server_tus |
| redhat | enterprise linux workstation | cpe:2.3:o:redhat:enterprise_linux_workstation |
| ibm | powerkvm | cpe:2.3:a:ibm:powerkvm |
| ibm | power hardware management console | cpe:2.3:a:ibm:power_hardware_management_console |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- ibm power hardware management console8.8.6.0
- ibm powerkvm2.1
- ibm powerkvm3.1
- kernel util-linuxup to 2.28 inclusive
- redhat enterprise linux desktop7.0
- redhat enterprise linux eus7.3
- redhat enterprise linux eus7.4
- redhat enterprise linux eus7.5
- redhat enterprise linux eus7.6
- redhat enterprise linux eus7.7
- redhat enterprise linux server7.0
- redhat enterprise linux server aus7.3
- redhat enterprise linux server aus7.4
- redhat enterprise linux server aus7.6
- redhat enterprise linux server aus7.7
- redhat enterprise linux server tus7.3
- redhat enterprise linux server tus7.6
- redhat enterprise linux server tus7.7
- redhat enterprise linux workstation7.0
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | util-linux | before 2.28.1-1 | 2.28.1-1 |
| openSUSE:Tumbleweed | util-linux | before 2.36.2-3.2 | 2.36.2-3.2 |
| Red Hat:enterprise_linux:7::client | libblkid | before 0:2.23.2-33.el7 | 0:2.23.2-33.el7 |
| Red Hat:enterprise_linux:7::client | libblkid-devel | before 0:2.23.2-33.el7 | 0:2.23.2-33.el7 |
| Red Hat:enterprise_linux:7::client | libmount | before 0:2.23.2-33.el7 | 0:2.23.2-33.el7 |
| Red Hat:enterprise_linux:7::client | libmount-devel | before 0:2.23.2-33.el7 | 0:2.23.2-33.el7 |
| Red Hat:enterprise_linux:7::client | libuuid | before 0:2.23.2-33.el7 | 0:2.23.2-33.el7 |
| Red Hat:enterprise_linux:7::client | libuuid-devel | before 0:2.23.2-33.el7 | 0:2.23.2-33.el7 |
| Red Hat:enterprise_linux:7::client | util-linux | before 0:2.23.2-33.el7 | 0:2.23.2-33.el7 |
| Red Hat:enterprise_linux:7::client | util-linux-debuginfo | before 0:2.23.2-33.el7 | 0:2.23.2-33.el7 |
| Red Hat:enterprise_linux:7::client | uuidd | before 0:2.23.2-33.el7 | 0:2.23.2-33.el7 |
| SUSE:Linux Enterprise Desktop 12 SP1 | python-libmount | before 2.25-37.1 | 2.25-37.1 |
| SUSE:Linux Enterprise Desktop 12 SP1 | util-linux | before 2.25-37.1 | 2.25-37.1 |
| SUSE:Linux Enterprise Desktop 12 SP1 | util-linux-systemd | before 2.25-37.1 | 2.25-37.1 |
| SUSE:Linux Enterprise Desktop 12 SP2 | python-libmount | before 2.28-42.4 | 2.28-42.4 |
| SUSE:Linux Enterprise Desktop 12 SP2 | util-linux | before 2.28-42.1 | 2.28-42.1 |
| SUSE:Linux Enterprise Desktop 12 SP2 | util-linux-systemd | before 2.28-42.3 | 2.28-42.3 |
| SUSE:Linux Enterprise Server for SAP Applications 12 | python-libmount | before 2.25-24.10.3 | 2.25-24.10.3 |
| SUSE:Linux Enterprise Server for SAP Applications 12 | util-linux | before 2.25-24.10.1 | 2.25-24.10.1 |
| SUSE:Linux Enterprise Server for SAP Applications 12 | util-linux-systemd | before 2.25-24.10.1 | 2.25-24.10.1 |
Same product
kernel: all recordsOther highest-scoring records for the same primary product.
- CVE-2015-5224The mkostemp function in login-utils in util-linux when used incorrectly allows remote attackers to cause file name collision and possibly o40Plan
- CVE-2018-7738In util-linux before 2.32-rc1, bash-completion/umount allows local users to gain privileges by embedding shell commands in a mountpoint name31Monitor
- CVE-2016-2779runuser in util-linux allows local users to escape to the parent session via a crafted TIOCSTI ioctl call, which pushes characters to the te31Monitor
- CVE-2007-5191mount and umount in util-linux and loop-aes-utils call the setuid and setgid functions in the wrong order and do not check the return values28Monitor
- CVE-2020-21583An issue was discovered in hwclock.13-v2.27 allows attackers to gain escalated privlidges or execute arbitrary commands via the path paramet26Monitor
- CVE-2021-3996A logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem.22Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:util-linux | 2.28.1-1 · Debian:12 | Package registry (OSV) |
| opensuse:util-linux | 2.36.2-3.2 · openSUSE:Tumbleweed | Package registry (OSV) |
| red hat:libblkid | 0:2.23.2-33.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:libblkid-devel | 0:2.23.2-33.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:libmount | 0:2.23.2-33.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:libmount-devel | 0:2.23.2-33.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:libuuid | 0:2.23.2-33.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:libuuid-devel | 0:2.23.2-33.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:util-linux | 0:2.23.2-33.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:util-linux-debuginfo | 0:2.23.2-33.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| red hat:uuidd | 0:2.23.2-33.el7 · Red Hat:enterprise_linux:7::client | Package registry (OSV) |
| suse:python-libmount | 2.25-37.1 · SUSE:Linux Enterprise Desktop 12 SP1 | Package registry (OSV) |
| suse:util-linux | 2.25-37.1 · SUSE:Linux Enterprise Desktop 12 SP1 | Package registry (OSV) |
| suse:util-linux-systemd | 2.25-37.1 · SUSE:Linux Enterprise Desktop 12 SP1 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.
Technical details
Attack conditions
- Physical access to the device is required.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Physical
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
—
CVSS vector
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- rhn.redhat.com/errata/RHSA-2016-2605.html
- www-01.ibm.com/support/docview.wss?uid=isg3T1024543
- www-01.ibm.com/support/docview.wss?uid=nas8N1021801
- www.openwall.com/lists/oss-security/2016/07/11/2
- www.securityfocus.com/bid/91683
- www.securitytracker.com/id/1036272
- git.kernel.org/pub/scm/utils/util-linux/util-linux.git/commit/?id=7164a1c3
Vendor advisories and official records. Exploit/PoC links are deliberately left out.