CVE-2025-37837
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
iommu/tegra241-cmdqv: Fix warnings due to dmam_free_coherent()
This is because the LVCMDQ queue memory are managed by devres, while that dmam_free_coherent() is called in the context of devm_action_release().
Jason pointed out that "arm_smmu_impl_probe() has mis-ordered the devres callbacks if ops->device_remove() is going to be manually freeing things that probe allocated": https://lore.kernel.org/linux-iommu/20250407174408.GB1722458@nvidia.com/
In fact, tegra241_cmdqv_init_structures() only allocates memory resources which means any failure that it generates would be similar to -ENOMEM, so there is no point in having that "falling back to standard SMMU" routine, as the standard SMMU would likely fail to allocate memory too.
Leer descripción completaMostrar menos
Remove the unwind part in tegra241_cmdqv_init_structures(), and return a proper error code to ask SMMU driver to call tegra241_cmdqv_remove() via impl_ops->device_remove(). Then, drop tegra241_vintf_free_lvcmdq() since devres will take care of that.
Detalles técnicos trazas, registros y código del informe original
Two WARNINGs are observed when SMMU driver rolls back upon failure: arm-smmu-v3.9.auto: Failed to register iommu arm-smmu-v3.9.auto: probe with driver arm-smmu-v3 failed with error -22 ------------[ cut here ]------------ WARNING: CPU: 5 PID: 1 at kernel/dma/mapping.c:74 dmam_free_coherent+0xc0/0xd8 Call trace: dmam_free_coherent+0xc0/0xd8 (P) tegra241_vintf_free_lvcmdq+0x74/0x188 tegra241_cmdqv_remove_vintf+0x60/0x148 tegra241_cmdqv_remove+0x48/0xc8 arm_smmu_impl_remove+0x28/0x60 devm_action_release+0x1c/0x40 ------------[ cut here ]------------ 128 pages are still in use! WARNING: CPU: 16 PID: 1 at mm/page_alloc.c:6902 free_contig_range+0x18c/0x1c8 Call trace: free_contig_range+0x18c/0x1c8 (P) cma_release+0x154/0x2f0 dma_free_contiguous+0x38/0xa0 dma_direct_free+0x10c/0x248 dma_free_attrs+0x100/0x290 dmam_free_coherent+0x78/0xd8 tegra241_vintf_free_lvcmdq+0x74/0x160 tegra241_cmdqv_remove+0x98/0x198 arm_smmu_impl_remove+0x28/0x60 devm_action_release+0x1c/0x40
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.28%
- Percentil entre todas las CVEs puntuadas: 19
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- NVD-CWE-noinfo
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2025-37837",
"cveTags": [],
"metrics": {
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 5.5,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 1.8
}
]
},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "483e0bd8883a40fd3dd3193997a4014337698d72",
"lessThan": "e5dd974d6e00704553308ef1a88659f8dcfb39d4",
"versionType": "git"
},
{
"status": "affected",
"version": "483e0bd8883a40fd3dd3193997a4014337698d72",
"lessThan": "5584dbf393df509159813645a487b1ef76557722",
"versionType": "git"
},
{
"status": "affected",
"version": "483e0bd8883a40fd3dd3193997a4014337698d72",
"lessThan": "e38ed6908080047d8fa1763d1da86b584f9eb55b",
"versionType": "git"
},
{
"status": "affected",
"version": "483e0bd8883a40fd3dd3193997a4014337698d72",
"lessThan": "767e22001dfce64cc03b7def1562338591ab6031",
"versionType": "git"
}
],
"programFiles": [
"drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.24",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.13.12",
"versionType": "semver",
"lessThanOrEqual": "6.13.*"
},
{
"status": "unaffected",
"version": "6.14.3",
"versionType": "semver",
"lessThanOrEqual": "6.14.*"
},
{
"status": "unaffected",
"version": "6.15",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-05-09T07:16:04.467",
"references": [
{
"url": "https://git.kernel.org/stable/c/5584dbf393df509159813645a487b1ef76557722",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/767e22001dfce64cc03b7def1562338591ab6031",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e38ed6908080047d8fa1763d1da86b584f9eb55b",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e5dd974d6e00704553308ef1a88659f8dcfb39d4",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/tegra241-cmdqv: Fix warnings due to dmam_free_coherent()\n\nTwo WARNINGs are observed when SMMU driver rolls back upon failure:\n arm-smmu-v3.9.auto: Failed to register iommu\n arm-smmu-v3.9.auto: probe with driver arm-smmu-v3 failed with error -22\n ------------[ cut here ]------------\n WARNING: CPU: 5 PID: 1 at kernel/dma/mapping.c:74 dmam_free_coherent+0xc0/0xd8\n Call trace:\n dmam_free_coherent+0xc0/0xd8 (P)\n tegra241_vintf_free_lvcmdq+0x74/0x188\n tegra241_cmdqv_remove_vintf+0x60/0x148\n tegra241_cmdqv_remove+0x48/0xc8\n arm_smmu_impl_remove+0x28/0x60\n devm_action_release+0x1c/0x40\n ------------[ cut here ]------------\n 128 pages are still in use!\n WARNING: CPU: 16 PID: 1 at mm/page_alloc.c:6902 free_contig_range+0x18c/0x1c8\n Call trace:\n free_contig_range+0x18c/0x1c8 (P)\n cma_release+0x154/0x2f0\n dma_free_contiguous+0x38/0xa0\n dma_direct_free+0x10c/0x248\n dma_free_attrs+0x100/0x290\n dmam_free_coherent+0x78/0xd8\n tegra241_vintf_free_lvcmdq+0x74/0x160\n tegra241_cmdqv_remove+0x98/0x198\n arm_smmu_impl_remove+0x28/0x60\n devm_action_release+0x1c/0x40\n\nThis is because the LVCMDQ queue memory are managed by devres, while that\ndmam_free_coherent() is called in the context of devm_action_release().\n\nJason pointed out that \"arm_smmu_impl_probe() has mis-ordered the devres\ncallbacks if ops->device_remove() is going to be manually freeing things\nthat probe allocated\":\nhttps://lore.kernel.org/linux-iommu/20250407174408.GB1722458@nvidia.com/\n\nIn fact, tegra241_cmdqv_init_structures() only allocates memory resources\nwhich means any failure that it generates would be similar to -ENOMEM, so\nthere is no point in having that \"falling back to standard SMMU\" routine,\nas the standard SMMU would likely fail to allocate memory too.\n\nRemove the unwind part in tegra241_cmdqv_init_structures(), and return a\nproper error code to ask SMMU driver to call tegra241_cmdqv_remove() via\nimpl_ops->device_remove(). Then, drop tegra241_vintf_free_lvcmdq() since\ndevres will take care of that."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iommu/tegra241-cmdqv: Se corrigen las advertencias debido a dmam_free_coherent() Se observan dos ADVERTENCIAS cuando el controlador SMMU se revierte tras un error: arm-smmu-v3.9.auto: No se pudo registrar iommu arm-smmu-v3.9.auto: La sonda con el controlador arm-smmu-v3 falló con el error -22 ------------[ cortar aquí ]------------ ADVERTENCIA: CPU: 5 PID: 1 en kernel/dma/mapping.c:74 dmam_free_coherent+0xc0/0xd8 Rastreo de llamadas: dmam_free_coherent+0xc0/0xd8 (P) tegra241_vintf_free_lvcmdq+0x74/0x188 tegra241_cmdqv_remove_vintf+0x60/0x148 tegra241_cmdqv_remove+0x48/0xc8 arm_smmu_impl_remove+0x28/0x60 devm_action_release+0x1c/0x40 ------------[ cortar aquí ]------------ ¡128 páginas aún están en uso! ADVERTENCIA: CPU: 16 PID: 1 en mm/page_alloc.c:6902 free_contig_range+0x18c/0x1c8 Rastreo de llamadas: free_contig_range+0x18c/0x1c8 (P) cma_release+0x154/0x2f0 dma_free_contiguous+0x38/0xa0 dma_direct_free+0x10c/0x248 dma_free_attrs+0x100/0x290 dmam_free_coherent+0x78/0xd8 tegra241_vintf_free_lvcmdq+0x74/0x160 tegra241_cmdqv_remove+0x98/0x198 arm_smmu_impl_remove+0x28/0x60 devm_action_release+0x1c/0x40 Esto se debe a que devres gestiona la memoria de la cola LVCMDQ, mientras que dmam_free_coherent() se llama en el contexto de devm_action_release(). Jason señaló que \"arm_smmu_impl_probe() ha ordenado incorrectamente las devoluciones de llamada de devres si ops->device_remove() va a liberar manualmente los recursos asignados por la sonda\": https://lore.kernel.org/linux-iommu/20250407174408.GB1722458@nvidia.com/ De hecho, tegra241_cmdqv_init_structures() solo asigna recursos de memoria, lo que significa que cualquier fallo que genere sería similar a -ENOMEM, por lo que no tiene sentido recurrir a la rutina SMMU estándar, ya que es probable que la SMMU estándar tampoco asigne memoria. Elimine la parte de desenrollado en tegra241_cmdqv_init_structures() y devuelva un código de error adecuado para solicitar al controlador SMMU que llame a tegra241_cmdqv_remove() mediante impl_ops->device_remove(). Luego, elimine tegra241_vintf_free_lvcmdq(), ya que devres se encargará de ello."
}
],
"lastModified": "2026-06-17T09:15:32.193",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0A7F4DC6-D8BB-41CD-97F3-E05815513305",
"versionEndExcluding": "6.12.24",
"versionStartIncluding": "6.12"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4A475784-BF3B-4514-81EE-49C8522FB24A",
"versionEndExcluding": "6.13.12",
"versionStartIncluding": "6.13"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "483E2E15-2135-4EC6-AB64-16282C5EF704",
"versionEndExcluding": "6.14.3",
"versionStartIncluding": "6.14"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8D465631-2980-487A-8E65-40AE2B9F8ED1"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}