What is CVE-2026-64256?

CVE-2026-64256 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 6.8 onward and patched in 6.12.96, 6.18.39, 7.1.4 and others. CVE-2026-64256 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-64256?

CVE-2026-64256 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-64256?

Yes, CVE-2026-64256 has been patched. Fixed versions include 6.12.96, 6.18.39, 7.1.4 and others. If you are running Linux kernel 6.8 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-64256 actively exploited?

CVE-2026-64256 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

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.

Package Linux Kernel

Published 2026-07-25

Last modified 2026-07-25

Patch available

Yes

Affected versions

Linux kernel versions 6.8 and later are affected. Fixed in 6.12.96, 6.18.39, 7.1.4, 7.2-rc4 and their respective stable series.

Affected from

≥ 6.8

Fixed in

✓ 6.12.96 6.12.x ✓ 6.18.39 6.18.x ✓ 7.1.4 7.1.x ✓ 7.2-rc4

References

4 total

Frequently asked questions

What is CVE-2026-64256?

CVE-2026-64256 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.8 onward and has been patched in 6.12.96, 6.18.39, 7.1.4 and others. CVE-2026-64256 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-64256?

Yes. CVE-2026-64256 has been patched. Fixed versions include 6.12.96, 6.18.39, 7.1.4 and others. If you are running Linux kernel 6.8 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-64256 actively exploited?

No. CVE-2026-64256 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.