CVE-2025-38519
N/A
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | f04b0fedbe714f822bd066b319a60faa39a985a1 < ca4bb9ac706f05ead8ac1cce7b8245fc0645a687 | affected |
| Linux | Linux | f04b0fedbe714f822bd066b319a60faa39a985a1 < bd225b9591442065beb876da72656f4a2d627d03 | affected |
| Linux | Linux | 6.15 | affected |
| Linux | Linux | 0 < 6.15 | unaffected |
| Linux | Linux | 6.15.7 <= 6.15.* | unaffected |
| Linux | Linux | 6.16 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/ca4bb9ac706f05ead8ac1cce7b8245fc0645a687
- https://git.kernel.org/stable/c/bd225b9591442065beb876da72656f4a2d627d03
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