Riskcovery

CVE-2025-38519

mm/damon: fix divide by zero in damon_get_intervals_score()

State
Published
Severity
Not scored
Published
Aug 16, 2025
Updated
May 11, 2026
Reserved
Apr 16, 2025

Read the record on cve.org

Description

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

mm/damon: fix divide by zero in damon_get_intervals_score()

The current implementation allows having zero size regions with no special reasons, but damon_get_intervals_score() gets crashed by divide by zero when the region size is zero.

[ 29.403950] Oops: divide error: 0000 [#1] SMP NOPTI

This patch fixes the bug, but does not disallow zero size regions to keep the backward compatibility since disallowing zero size regions might be a breaking change for some users.

In addition, the same crash can happen when intervals_goal.access_bp is zero so this should be fixed in stable trees as well.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • f04b0fedbe714f822bd066b319a60faa39a985a1 to before ca4bb9ac706f05ead8ac1cce7b8245fc0645a687Affected
  • f04b0fedbe714f822bd066b319a60faa39a985a1 to before bd225b9591442065beb876da72656f4a2d627d03Affected
LinuxLinux
  • 6.15Affected
  • before 6.15Not affected
  • 6.15.7 through 6.15.*Not affected
  • 6.16 and laterNot affected

References

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