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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-52905

mm/damon/core: disallow non-power of two min_region_sz on damon_start()

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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].

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • d8f867fa0825fb3e358457566d7326d8aab2406a to < 1de2db19a6028abe7d905875922faef5b873de67affected
  • d8f867fa0825fb3e358457566d7326d8aab2406a to < 89b6226b6c2a4add3939f361653a47c212d6ab75affected
  • d8f867fa0825fb3e358457566d7326d8aab2406a to < 95093e5cb4c5b50a5b1a4b79f2942b62744bd66aaffected

Linux Linux

Default version status: affected

  • 6.18affected
  • 0 to < 6.18unaffected
  • 6.18.30 to ≤ 6.18.*unaffected
  • 7.0.4 to ≤ 7.0.*unaffected
  • 7.1 to ≤ *unaffected

References