Riskcovery

CVE-2026-64357

xfs: fix exchmaps reservation limit check

State
Published
Severity
Not scored
Published
Jul 25, 2026
Updated
Aug 17, 2026
Reserved
Jul 19, 2026

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

xfs: fix exchmaps reservation limit check

xfs_exchmaps_estimate_overhead() adds the bmbt and rmapbt overhead to a local resblks variable, but the final UINT_MAX check still tests req->resblks. That is the reservation value from before the overhead was added.

The computed value is stored back in req->resblks and later passed to xfs_trans_alloc(), whose block reservation argument is unsigned int. Check the computed reservation so the existing limit applies to the value that will be used.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 966ceafc7a437105ecfe1cadb3747b2965a260ca to before c597c8580d50127fc1221b5a5b653a94d49e23e3Affected
  • 966ceafc7a437105ecfe1cadb3747b2965a260ca to before a62ef2d13d6e7270dd5e88c6082bf2d0edcd5112Affected
  • 966ceafc7a437105ecfe1cadb3747b2965a260ca to before 4707344b0d36d1012c8a1716e20167cd3afdd5f1Affected
  • 966ceafc7a437105ecfe1cadb3747b2965a260ca to before 0a5213bbff62b51c7d4999ac8c7e11ea57d00d45Affected
LinuxLinux
  • 6.10Affected
  • before 6.10Not affected
  • 6.12.96 through 6.12.*Not affected
  • 6.18.39 through 6.18.*Not affected
  • 7.1.4 through 7.1.*Not affected
  • 7.2 and laterNot affected

References

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