CVE-2026-64256

xfs: don't wrap around quota ids in dqiterate

MEDIUM

5.5

CVSS Score

Published: July 25, 2026 at 08:49 AM UTC

Updated: August 17, 2026 at 05:17 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.2%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

6.13 ≤ v < 6.18.396.19 ≤ v < 7.1.46.8 ≤ v < 6.12.966.8 ≤ v < 6.18.396.8 ≤ v < 7.1.46.8 ≤ v < 7.221d7500929c8a0b10e22a6755850c6f9a92802847.2 rc1 7.2 rc2 7.2 rc3

Vendor states this is fixed in 249e311c2ba392ceaf9ebfc145a46922946f069a (fixed)

Vendor states this is fixed in 2b14fe1e0924c6b901f4256456342569c5397abe (fixed)

Vendor states this is fixed in d1c4c40599c376aeb0c93068a2ae344e79ee4b90 (fixed)

Vendor states this is fixed in d766e4e5e85d829629c3ba503802fe1303d7b591 (fixed)

Vendor states this is fixed in 6.12.96 (unaffected)

Vendor states this is fixed in 6.18.39 (unaffected)

Vendor states this is fixed in 6.8 (unaffected)

Vendor states this is fixed in 7.1.4 (unaffected)

Vendor states this is fixed in 7.2 (unaffected)