PT-2026-47791 · Linux · Linux

Published 2026-06-09 · Updated 2026-06-09 · CVE-2026-52905

Mitre

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].

Related Identifiers

CVE-2026-52905

Affected Products

Linux

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-52905 · Security Note
• https://git.kernel.org/stable/c/89b6226b6c2a4add3939f361653a47c212d6ab75 · Note
• https://git.kernel.org/stable/c/95093e5cb4c5b50a5b1a4b79f2942b62744bd66a · Note
• https://git.kernel.org/stable/c/1de2db19a6028abe7d905875922faef5b873de67 · Note