CVE-2026-64256

CVE-2026-64256

Medium · published July 25, 2026

CVSS v3.1
5.5
EPSS
0%
Percentile
4.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00159 · 4.7th percentile
Published
2026-07-25T14:17Z
Affected products (6)
ProductVersionsFixed in
linux/linux_kernel≥ 6.8, < 6.12.966.12.96
linux/linux_kernel≥ 6.13, < 6.18.396.18.39
linux/linux_kernel≥ 6.19, < 7.1.47.1.4
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
References (4)
https://git.kernel.org/stable/c/249e311c2ba392ceaf9ebfc145a46922946f069a · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2b14fe1e0924c6b901f4256456342569c5397abe · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d1c4c40599c376aeb0c93068a2ae344e79ee4b90 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d766e4e5e85d829629c3ba503802fe1303d7b591 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS history
Timeline
  • 25 JUL 08:49Z
    xfs: don't wrap around quota ids in dqiterate
    cvelistv5