util-linux/libblkid is ubiquitous across Linux distributions; corrupted partition metadata can cause widespread data loss if downstream tools act on it.
CVE-2026-53615
Integer overflow in libblkid partition parsing causes false/overlapping partition reports.
Is CVE-2026-53615 being exploited?
Not confirmed. CVE-2026-53615 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.18% probability of exploitation in the next 30 days.
How severe is CVE-2026-53615?
CVE-2026-53615 is rated High with a CVSS score of 8.0. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-53615?
Yes. A fix has been recorded for CVE-2026-53615. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-53615 affect?
CVE-2026-53615 affects util-linux < 2.41.4, libblkid, Linux distributions using util-linux, Tools consuming blkid output (udev, installers, partitioners). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-53615?
Upgrade util-linux to 2.41.4+, block/validate untrusted removable media and disk images.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local attacker with a crafted disk image or removable media can trigger integer wrap in libblkid, producing false/overlapping partitions and risking disk corruption or data loss.
Patch when possible
- affected< 2.41.4
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.