CVE-2025-40353 (GCVE-0-2025-40353)

Vulnerability from cvelistv5 – Published: 2025-12-16 13:30 – Updated: 2026-05-11 21:47
VLAI
Title
arm64: mte: Do not warn if the page is already tagged in copy_highpage()
Summary
In the Linux kernel, the following vulnerability has been resolved: arm64: mte: Do not warn if the page is already tagged in copy_highpage() The arm64 copy_highpage() assumes that the destination page is newly allocated and not MTE-tagged (PG_mte_tagged unset) and warns accordingly. However, following commit 060913999d7a ("mm: migrate: support poisoned recover from migrate folio"), folio_mc_copy() is called before __folio_migrate_mapping(). If the latter fails (-EAGAIN), the copy will be done again to the same destination page. Since copy_highpage() already set the PG_mte_tagged flag, this second copy will warn. Replace the WARN_ON_ONCE(page already tagged) in the arm64 copy_highpage() with a comment.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6638 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 060913999d7a9e50c283fdb15253fc27974ddadc , < 5ff5765a1fc526f07d3bbaedb061d970eb13bcf4 (git)
Affected: 060913999d7a9e50c283fdb15253fc27974ddadc , < 0bbf3fc6e9211fce9889fe8efbb89c220504d617 (git)
Affected: 060913999d7a9e50c283fdb15253fc27974ddadc , < b98c94eed4a975e0c80b7e90a649a46967376f58 (git)
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Linux Linux Affected: 6.11
Unaffected: 0 , < 6.11 (semver)
Unaffected: 6.12.56 , ≤ 6.12.* (semver)
Unaffected: 6.17.6 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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Show details on NVD website
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/mm/copypage.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "status": "affected",
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              "versionType": "git"
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          "vendor": "Linux",
          "versions": [
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              "version": "6.11"
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            },
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      "cpeApplicability": [
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: mte: Do not warn if the page is already tagged in copy_highpage()\n\nThe arm64 copy_highpage() assumes that the destination page is newly\nallocated and not MTE-tagged (PG_mte_tagged unset) and warns\naccordingly. However, following commit 060913999d7a (\"mm: migrate:\nsupport poisoned recover from migrate folio\"), folio_mc_copy() is called\nbefore __folio_migrate_mapping(). If the latter fails (-EAGAIN), the\ncopy will be done again to the same destination page. Since\ncopy_highpage() already set the PG_mte_tagged flag, this second copy\nwill warn.\n\nReplace the WARN_ON_ONCE(page already tagged) in the arm64\ncopy_highpage() with a comment."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:47:43.712Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/5ff5765a1fc526f07d3bbaedb061d970eb13bcf4"
        },
        {
          "url": "https://git.kernel.org/stable/c/0bbf3fc6e9211fce9889fe8efbb89c220504d617"
        },
        {
          "url": "https://git.kernel.org/stable/c/b98c94eed4a975e0c80b7e90a649a46967376f58"
        }
      ],
      "title": "arm64: mte: Do not warn if the page is already tagged in copy_highpage()",
      "x_generator": {
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      }
    }
  },
  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40353",
    "datePublished": "2025-12-16T13:30:26.273Z",
    "dateReserved": "2025-04-16T07:20:57.187Z",
    "dateUpdated": "2026-05-11T21:47:43.712Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-40353",
      "date": "2026-11-15",
      "epss": "0.00199",
      "percentile": "0.09762"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "arch/arm64/mm/copypage.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
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                    "versionType": "git"
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                    "version": "060913999d7a9e50c283fdb15253fc27974ddadc",
                    "versionType": "git"
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              },
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                    "status": "unaffected",
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            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: mte: Do not warn if the page is already tagged in copy_highpage()\n\nThe arm64 copy_highpage() assumes that the destination page is newly\nallocated and not MTE-tagged (PG_mte_tagged unset) and warns\naccordingly. However, following commit 060913999d7a (\"mm: migrate:\nsupport poisoned recover from migrate folio\"), folio_mc_copy() is called\nbefore __folio_migrate_mapping(). If the latter fails (-EAGAIN), the\ncopy will be done again to the same destination page. Since\ncopy_highpage() already set the PG_mte_tagged flag, this second copy\nwill warn.\n\nReplace the WARN_ON_ONCE(page already tagged) in the arm64\ncopy_highpage() with a comment."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\narm64: mte: No advertir si la p\u00e1gina ya est\u00e1 etiquetada en copy_highpage()\n\nLa arm64 copy_highpage() asume que la p\u00e1gina de destino est\u00e1 reci\u00e9n asignada y no etiquetada con MTE (PG_mte_tagged sin establecer) y advierte en consecuencia. Sin embargo, tras el commit 060913999d7a (\u0027mm: migrate: support poisoned recover from migrate folio\u0027), se llama a folio_mc_copy() antes de __folio_migrate_mapping(). Si esta \u00faltima falla (-EAGAIN), la copia se realizar\u00e1 de nuevo a la misma p\u00e1gina de destino. Dado que copy_highpage() ya estableci\u00f3 el flag PG_mte_tagged, esta segunda copia advertir\u00e1.\n\nReemplazar el WARN_ON_ONCE(p\u00e1gina ya etiquetada) en la arm64 copy_highpage() con un comentario."
          }
        ],
        "id": "CVE-2025-40353",
        "lastModified": "2026-10-14T13:10:00.187",
        "metrics": {},
        "published": "2025-12-16T14:15:47.203",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/0bbf3fc6e9211fce9889fe8efbb89c220504d617"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/5ff5765a1fc526f07d3bbaedb061d970eb13bcf4"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/b98c94eed4a975e0c80b7e90a649a46967376f58"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-11-05T15:47:57+00:00",
      "cve": "CVE-2025-40353",
      "id": "CVE-2025-40353",
      "initial_release_date": "2025-12-16T00:00:00+00:00",
      "product_status:known_affected": "186",
      "product_status:known_not_affected": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: arm64: mte: Do not warn if the page is already tagged in copy_highpage()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40353.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-11-01T01:14:25Z",
      "cve": "CVE-2025-40353",
      "id": "CVE-2025-40353",
      "initial_release_date": "2025-12-17T00:30:29Z",
      "product_status:known_affected": "396",
      "product_status:known_not_affected": "540",
      "product_status:recommended": "203",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-40353",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2025/cve-2025-40353.json",
      "version": "33"
    }
  }
}



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