GHSA-Q36J-3HM6-HH2W
Vulnerability from github – Published: 2026-06-09 15:32 – Updated: 2026-07-09 00:31In 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": [],
"aliases": [
"CVE-2026-52905"
],
"database_specific": {
"cwe_ids": [
"CWE-1284"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-09T14:16:44Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/core: disallow non-power of two min_region_sz on damon_start()\n\nCommit d8f867fa0825 (\"mm/damon: add damon_ctx-\u003emin_sz_region\") introduced\na bug that allows unaligned DAMON region address ranges. Commit\nc80f46ac228b (\"mm/damon/core: disallow non-power of two min_region_sz\")\nfixed it, but only for damon_commit_ctx() use case. Still, DAMON sysfs\ninterface can emit non-power of two min_region_sz via damon_start(). Fix\nthe path by adding the is_power_of_2() check on damon_start().\n\nThe issue was discovered by sashiko [1].",
"id": "GHSA-q36j-3hm6-hh2w",
"modified": "2026-07-09T00:31:06Z",
"published": "2026-06-09T15:32:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52905"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1de2db19a6028abe7d905875922faef5b873de67"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/89b6226b6c2a4add3939f361653a47c212d6ab75"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/95093e5cb4c5b50a5b1a4b79f2942b62744bd66a"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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