CVE-2026-52905
mm/damon/core: disallow non-power of two min_region_sz on damon_start()
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: mm/damon/core: disallow non-power of two min_region_sz on damon_start() Commit d8f867fa0825 ("mm/damon: add damon_ctx->min_sz_region") introduced a bug that allows unaligned DAMON region address ranges. Commit c80f46ac228b ("mm/damon/core: disallow non-power of two min_region_sz") fixed it, but only for damon_commit_ctx() use case. Still, DAMON sysfs interface can emit non-power of two min_region_sz via damon_start(). Fix the path by adding the is_power_of_2() check on damon_start(). The issue was discovered by sashiko [1].
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Jun 9, 2026 |
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Affected Versions
Linux / Linux
d8f867fa0825fb3e358457566d7326d8aab2406a < 1de2db19a6028abe7d905875922faef5b873de67 d8f867fa0825fb3e358457566d7326d8aab2406a < 89b6226b6c2a4add3939f361653a47c212d6ab75 d8f867fa0825fb3e358457566d7326d8aab2406a < 95093e5cb4c5b50a5b1a4b79f2942b62744bd66a
Linux / Linux
6.18