Integer overflow in Util-linux - CVE-2026-53615

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

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.

Util-linux
openEuler
Anolis OS
util-linux
libblkid
libfdisk
libmount
libsmartcols
libuuid
python3-libmount
util-linux-debuginfo
util-linux-debugsource
util-linux-devel
util-linux-user
uuidd
util-linux-help
util-linux-i18n
util-linux-core
libuuid-devel
libsmartcols-devel
libmount-devel
libfdisk-devel
libblkid-devel

Install security update from vendor's website.

Util-linux - update to 2.41.4
util-linux - addressed in versions 2.37.2-58, 2.39.1-46
libblkid - addressed in versions 2.37.2-58, 2.39.1-46
libfdisk - addressed in versions 2.37.2-58, 2.39.1-46
libmount - addressed in versions 2.37.2-58, 2.39.1-46
libsmartcols - addressed in versions 2.37.2-58, 2.39.1-46
libuuid - addressed in versions 2.37.2-58, 2.39.1-46
python3-libmount - addressed in versions 2.37.2-58, 2.39.1-46
util-linux-debuginfo - addressed in versions 2.37.2-58, 2.39.1-46
util-linux-debugsource - addressed in versions 2.37.2-58, 2.39.1-46
util-linux-devel - addressed in versions 2.37.2-58, 2.39.1-46
util-linux-user - addressed in versions 2.37.2-58, 2.39.1-46
uuidd - addressed in versions 2.37.2-58, 2.39.1-46
util-linux-help - addressed in versions 2.37.2-58, 2.39.1-46
uuidd - update to 2.39.1-14
libblkid - update to 2.39.1-14
libfdisk - update to 2.39.1-14
util-linux-i18n - update to 2.39.1-14
util-linux-core - update to 2.39.1-14
util-linux - update to 2.39.1-14
python3-libmount - update to 2.39.1-14
libuuid-devel - update to 2.39.1-14
libuuid - update to 2.39.1-14
libsmartcols-devel - update to 2.39.1-14
libsmartcols - update to 2.39.1-14
libmount-devel - update to 2.39.1-14
libmount - update to 2.39.1-14
libfdisk-devel - update to 2.39.1-14
libblkid-devel - update to 2.39.1-14

• https://github.com/util-linux/util-linux/security/advisories/GHSA-h4rw-gv36-wmp5

• Multiple vulnerabilities in Util-linux
• openEuler 24.03 LTS SP4 update for util-linux
• openEuler 24.03 LTS SP3 update for util-linux
• openEuler 24.03 LTS SP1 update for util-linux
• openEuler 22.03 LTS SP4 update for util-linux
• Anolis OS update for util-linux