util-linux is a random collection of Linux utilities. Before util-linux 2.41.4, `parse_dos_extended()` in `libblkid/src/partitions/dos.c` computes an extended-partition start sector with 32-bit addition and does not apply the extended-area bounds checks to the first two EBR entries. A local attacker who causes a crafted DOS extended-partition disk image or removable medium to be probed can wrap `cur_start + start` to sector zero and cause libblkid to report a false partition overlapping the MBR. This directly compromises the integrity of the reported partition metadata; disk modification or availability loss requires a separate downstream consumer to act on that metadata. This issue is fixed in 2.41.4.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade libuuid-develUpgrade util-linuxUpgrade libblkid-develUpgrade python-libmountUpgrade libmountUpgrade uuiddUpgrade libfdiskUpgrade libsmartcolsUpgrade libblkidUpgrade libsmartcols-develUpgrade libfdisk-develUpgrade libmount-develUpgrade libuuidUpgrade util-linux-debuginfoUpgrade util-linux-user | Jul 8, 2026 | Jul 8, 2026 |
| Amazon_linux_2023 | — | Upgrade util-linux-core-debuginfoUpgrade util-linuxUpgrade uuiddUpgrade libfdisk-debuginfoUpgrade libuuid-develUpgrade util-linux-debugsourceUpgrade uuidd-debuginfoUpgrade util-linux-user-debuginfoUpgrade libmount-debuginfoUpgrade util-linux-userUpgrade libblkid-develUpgrade libsmartcolsUpgrade libblkid-debuginfoUpgrade libfdiskUpgrade libsmartcols-debuginfoUpgrade libmountUpgrade libmount-develUpgrade libuuidUpgrade libfdisk-develUpgrade libblkidUpgrade util-linux-debuginfoUpgrade libuuid-debuginfoUpgrade python3-libmount-debuginfoUpgrade python3-libmountUpgrade libsmartcols-develUpgrade util-linux-core | Oct 15, 2026 | Oct 14, 2026 |
| Debian | — | Upgrade util-linux | Aug 17, 2026 | Aug 17, 2026 |
| Redhat_linux | — | No solution exists | Oct 16, 2026 | Jun 18, 2026 |
| Ubuntu | — | Upgrade util-linux | Aug 31, 2026 | Jun 18, 2026 |
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