fkie_cve-2025-22124
Vulnerability from fkie_nvd
Published
2025-04-16 15:16
Modified
2025-11-03 18:27
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
md/md-bitmap: fix wrong bitmap_limit for clustermd when write sb
In clustermd, separate write-intent-bitmaps are used for each cluster
node:
0 4k 8k 12k
-------------------------------------------------------------------
| idle | md super | bm super [0] + bits |
| bm bits[0, contd] | bm super[1] + bits | bm bits[1, contd] |
| bm super[2] + bits | bm bits [2, contd] | bm super[3] + bits |
| bm bits [3, contd] | | |
So in node 1, pg_index in __write_sb_page() could equal to
bitmap->storage.file_pages. Then bitmap_limit will be calculated to
0. md_super_write() will be called with 0 size.
That means the first 4k sb area of node 1 will never be updated
through filemap_write_page().
This bug causes hang of mdadm/clustermd_tests/01r1_Grow_resize.
Here use (pg_index % bitmap->storage.file_pages) to make calculation
of bitmap_limit correct.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * |
{
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/md-bitmap: fix wrong bitmap_limit for clustermd when write sb\n\nIn clustermd, separate write-intent-bitmaps are used for each cluster\nnode:\n\n0 4k 8k 12k\n-------------------------------------------------------------------\n| idle | md super | bm super [0] + bits |\n| bm bits[0, contd] | bm super[1] + bits | bm bits[1, contd] |\n| bm super[2] + bits | bm bits [2, contd] | bm super[3] + bits |\n| bm bits [3, contd] | | |\n\nSo in node 1, pg_index in __write_sb_page() could equal to\nbitmap-\u003estorage.file_pages. Then bitmap_limit will be calculated to\n0. md_super_write() will be called with 0 size.\nThat means the first 4k sb area of node 1 will never be updated\nthrough filemap_write_page().\nThis bug causes hang of mdadm/clustermd_tests/01r1_Grow_resize.\n\nHere use (pg_index % bitmap-\u003estorage.file_pages) to make calculation\nof bitmap_limit correct."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: md/md-bitmap: corrige bitmap_limit incorrecto para clustermd al escribir sb En clustermd, se usan mapas de bits de intenci\u00f3n de escritura separados para cada nodo del cl\u00faster: 0 4k 8k 12k ------------------------------------------------------------------- | idle | md super | bm super [0] + bits | | bm bits[0, contd] | bm super[1] + bits | bm bits[1, contd] | | bm super[2] + bits | bm bits [2, contd] | bm super[3] + bits | | bm bits [3, contd] | | | Entonces, en el nodo 1, pg_index en __write_sb_page() podr\u00eda ser igual a bitmap-\u0026gt;storage.file_pages. Entonces, bitmap_limit se calcular\u00e1 como 0. md_super_write() se llamar\u00e1 con un tama\u00f1o de 0. Esto significa que la primera \u00e1rea de 4k del nodo 1 nunca se actualizar\u00e1 mediante filemap_write_page(). Este error provoca el bloqueo de mdadm/clustermd_tests/01r1_Grow_resize. En este caso, utilice (pg_index % bitmap-\u0026gt;storage.file_pages) para que el c\u00e1lculo de bitmap_limit sea correcto."
}
],
"id": "CVE-2025-22124",
"lastModified": "2025-11-03T18:27:37.333",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
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},
"published": "2025-04-16T15:16:06.540",
"references": [
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"url": "https://git.kernel.org/stable/c/60196f92bbc7901eb5cfa5d456651b87ea50a4a3"
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"url": "https://git.kernel.org/stable/c/6130825f34d41718c98a9b1504a79a23e379701e"
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": [
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"description": [
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"value": "NVD-CWE-noinfo"
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],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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