What is CVE-2026-64256?

CVE-2026-64256 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2026-07-25.

How severe is CVE-2026-64256?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Linux

CVE-2026-64256

In the Linux kernel, the following vulnerability has been resolved: xfs: don't wrap around quota ids in dqiterate LOLLM noticed that q_id is an unsigned 32-bit variable. If it happens to be set to XFS_DQ_ID_MAX due to a filesystem that actually has a dquot for ID_MAX, then this addition will truncate to zero and the iteration starts over. Fix this by casting to u64.

EPSS: 0.002 (5.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Linux — versions 7.2, 6.12.96, 7.1.4
Linux Linux_kernel — versions 7.2

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2026-64256?: CVE-2026-64256 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2026-07-25.
How severe is CVE-2026-64256?: Medium severity. CVSS v3 base score is 5.5 out of 10.