CVE-2026-64256

MEDIUM5.5

xfs: don't wrap around quota ids in dqiterate

Published Jul 25, 2026

Modified 1 weeks ago

Details

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.

References

WEB

https://git.kernel.org/stable/c/249e311c2ba392ceaf9ebfc145a46922946f069a

WEB

https://git.kernel.org/stable/c/2b14fe1e0924c6b901f4256456342569c5397abe

WEB

https://git.kernel.org/stable/c/d1c4c40599c376aeb0c93068a2ae344e79ee4b90

WEB

https://git.kernel.org/stable/c/d766e4e5e85d829629c3ba503802fe1303d7b591

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-64256

CVSS Analysis