CVE-2025-38690
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: drm/xe/migrate: prevent infinite recursion If the buf + offset is not aligned to XE_CAHELINE_BYTES we fallback to using a bounce buffer. However the bounce buffer here is allocated on the stack, and the only alignment requirement here is that it's naturally aligned to u8, and not XE_CACHELINE_BYTES. If the bounce buffer is also misaligned we then recurse back into the function again, however the new bounce buffer might also not be aligned, and might never be until we eventually blow through the stack, as we keep recursing. Instead of using the stack use kmalloc, which should respect the power-of-two alignment request here. Fixes a kernel panic when triggering this path through eudebug. v2 (Stuart): - Add build bug check for power-of-two restriction - s/EINVAL/ENOMEM/ (cherry picked from commit 38b34e928a08ba594c4bbf7118aa3aadacd62fff)
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Analyzed
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-09-04 16:15:37.153000
Last modified
2026-10-19 21:10:00.160000
View original CVE JSON
{
"id": "CVE-2025-38690",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-09-04T16:15:37.153",
"lastModified": "2026-10-19T21:10:00.160",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/migrate: prevent infinite recursion\n\nIf the buf + offset is not aligned to XE_CAHELINE_BYTES we fallback to\nusing a bounce buffer. However the bounce buffer here is allocated on\nthe stack, and the only alignment requirement here is that it's\nnaturally aligned to u8, and not XE_CACHELINE_BYTES. If the bounce\nbuffer is also misaligned we then recurse back into the function again,\nhowever the new bounce buffer might also not be aligned, and might never\nbe until we eventually blow through the stack, as we keep recursing.\n\nInstead of using the stack use kmalloc, which should respect the\npower-of-two alignment request here. Fixes a kernel panic when\ntriggering this path through eudebug.\n\nv2 (Stuart):\n - Add build bug check for power-of-two restriction\n - s/EINVAL/ENOMEM/\n\n(cherry picked from commit 38b34e928a08ba594c4bbf7118aa3aadacd62fff)"
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndrm/xe/migrate: evitar recursión infinita\n\nSi el buf + offset no está alineado a XE_CACHELINE_BYTES, recurrimos a usar un búfer de rebote. Sin embargo, el búfer de rebote aquí se asigna en la pila, y el único requisito de alineación aquí es que esté naturalmente alineado a u8, y no a XE_CACHELINE_BYTES. Si el búfer de rebote también está desalineado, entonces volvemos a recursar en la función, sin embargo, el nuevo búfer de rebote también podría no estar alineado, y podría nunca estarlo hasta que eventualmente agotemos la pila, a medida que seguimos recursando.\n\nEn lugar de usar la pila, usa kmalloc, lo que debería respetar la solicitud de alineación de potencia de dos aquí. Corrige un pánico del kernel al activar esta ruta a través de eudebug.\n\nv2 (Stuart):\n - Añadir verificación de error de compilación para la restricción de potencia de dos\n - s/EINVAL/ENOMEM/\n\n(seleccionado de la confirmación 38b34e928a08ba594c4bbf7118aa3aadacd62fff)"
}
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"affected": [
{
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"affectedData": [
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"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/gpu/drm/xe/xe_migrate.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"versionType": "git",
"status": "affected"
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"status": "affected"
}
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{
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"defaultStatus": "affected",
"programFiles": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
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{
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"versionType": "semver",
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{
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"versionType": "semver",
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{
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"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
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}
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}
],
"metrics": {
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"source": "[email protected]",
"type": "Primary",
"cvssData": {
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "CWE-617"
}
]
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"configurations": [
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