Vulnerability · Published Oct 16, 2026 · Assigned by redhat
CVE-2026-111581Libblockdev: libblockdev: argument injection in ntfs/vfat label-setting helpers via udisks2 setlabel() d-bus method
Low 3.3
In plain English
A low-severity argument injection in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
Official description
A flaw was found in libblockdev. The bd_fs_ntfs_set_label() and bd_fs_vfat_set_label() functions pass caller-supplied label values as bare positional arguments to the ntfslabel and fatlabel utilities without end-of-options separators or input validation for values beginning with a dash. This allows a label starting with '-' to be interpreted as a command-line flag by the spawned tool, potentially bypassing safety checks or causing unintended operations. This is reachable by unprivileged local users through the udisks2 Filesystem.SetLabel() D-Bus method without administrator authentication.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libblockdev | no fix listed | DEBIAN-CVE-2026-111581 |
| Debian:13 | libblockdev | no fix listed | DEBIAN-CVE-2026-111581 |
| Debian:14 | libblockdev | no fix listed | DEBIAN-CVE-2026-111581 |
| Ubuntu:22.04:LTS | libblockdev | no fix listed | UBUNTU-CVE-2026-111581 |
| Ubuntu:24.04:LTS | libblockdev | no fix listed | UBUNTU-CVE-2026-111581 |
| Ubuntu:26.04:LTS | libblockdev | no fix listed | UBUNTU-CVE-2026-111581 |
| Ubuntu:26.10 | libblockdev | no fix listed | UBUNTU-CVE-2026-111581 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
Weakness: CWE-88 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
References
- https://access.redhat.com/security/cve/CVE-2026-111581 vdb-entry, x_refsource_REDHAT
- RHBZ#2554104 issue-tracking, x_refsource_REDHAT