Integer overflow in Util-linux - CVE-2026-53615
Published: September 2, 2026
Vulnerability identifier: #VU146715
CSH Severity: Low
CVSS v4: 7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-53615
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service and overwrite critical disk structures.
The vulnerability exists due to integer overflow or wraparound in parse_dos_extended() in libblkid/src/partitions/dos.c when parsing a crafted disk image or removable media containing malicious EBR partition entries. A remote attacker can provide a specially crafted disk image or removable media to cause a denial of service and overwrite critical disk structures.
The issue can cause a wrapped partition start value to be registered as sector 0, which may lead downstream consumers to treat the MBR as a valid partition.
Affected software
Util-linux
How to mitigate CVE-2026-53615
Install security update from vendor's website.
Util-linux - update to 2.41.4