CVE-2025-40032
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: PCI: endpoint: pci-epf-test: Add NULL check for DMA channels before release The fields dma_chan_tx and dma_chan_rx of the struct pci_epf_test can be NULL even after EPF initialization. Then it is prudent to check that they have non-NULL values before releasing the channels. Add the checks in pci_epf_test_clean_dma_chan(). Without the checks, NULL pointer dereferences happen and they can lead to a kernel panic in some cases: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000050 Call trace: dma_release_channel+0x2c/0x120 (P) pci_epf_test_epc_deinit+0x94/0xc0 [pci_epf_test] pci_epc_deinit_notify+0x74/0xc0 tegra_pcie_ep_pex_rst_irq+0x250/0x5d8 irq_thread_fn+0x34/0xb8 irq_thread+0x18c/0x2e8 kthread+0x14c/0x210 ret_from_fork+0x10/0x20 [mani: trimmed the stack trace]
Severity
Not scored
CVSS score
Not available
Vulnerability status
Deferred
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-10-28 12:15:37.010000
Last modified
2026-10-19 21:10:00.160000
View original CVE JSON
{
"id": "CVE-2025-40032",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-10-28T12:15:37.010",
"lastModified": "2026-10-19T21:10:00.160",
"vulnStatus": "Deferred",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: endpoint: pci-epf-test: Add NULL check for DMA channels before release\n\nThe fields dma_chan_tx and dma_chan_rx of the struct pci_epf_test can be\nNULL even after EPF initialization. Then it is prudent to check that\nthey have non-NULL values before releasing the channels. Add the checks\nin pci_epf_test_clean_dma_chan().\n\nWithout the checks, NULL pointer dereferences happen and they can lead\nto a kernel panic in some cases:\n\n Unable to handle kernel NULL pointer dereference at virtual address 0000000000000050\n Call trace:\n dma_release_channel+0x2c/0x120 (P)\n pci_epf_test_epc_deinit+0x94/0xc0 [pci_epf_test]\n pci_epc_deinit_notify+0x74/0xc0\n tegra_pcie_ep_pex_rst_irq+0x250/0x5d8\n irq_thread_fn+0x34/0xb8\n irq_thread+0x18c/0x2e8\n kthread+0x14c/0x210\n ret_from_fork+0x10/0x20\n\n[mani: trimmed the stack trace]"
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nPCI: endpoint: pci-epf-test: Añadir comprobación de NULL para canales DMA antes de la liberación\n\nLos campos dma_chan_tx y dma_chan_rx de la estructura pci_epf_test pueden ser NULL incluso después de la inicialización de EPF. Entonces es prudente comprobar que tienen valores no-NULL antes de liberar los canales. Añadir las comprobaciones en pci_epf_test_clean_dma_chan().\n\nSin las comprobaciones, ocurren desreferencias de puntero NULL y pueden llevar a un pánico del kernel en algunos casos:\n\n Incapaz de manejar desreferencia de puntero NULL del kernel en la dirección virtual 0000000000000050\n Traza de llamada:\n dma_release_channel+0x2c/0x120 (P)\n pci_epf_test_epc_deinit+0x94/0xc0 [pci_epf_test]\n pci_epc_deinit_notify+0x74/0xc0\n tegra_pcie_ep_pex_rst_irq+0x250/0x5d8\n irq_thread_fn+0x34/0xb8\n irq_thread+0x18c/0x2e8\n kthread+0x14c/0x210\n ret_from_fork+0x10/0x20\n\n[mani: se ha recortado la traza de pila]"
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/pci/endpoint/functions/pci-epf-test.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "5ebf3fc59bd20d17df3ba26159787d13cf20d362",
"lessThan": "6411f840a9b5c47c00ca8e004733de232553870d",
"versionType": "git",
"status": "affected"
},
{
"version": "5ebf3fc59bd20d17df3ba26159787d13cf20d362",
"lessThan": "0c5ce6b6ccc22d486cc7239ed908cb0ae5363a7b",
"versionType": "git",
"status": "affected"
},
{
"version": "5ebf3fc59bd20d17df3ba26159787d13cf20d362",
"lessThan": "fb54ffd60064c4e5139a3eb216e877b1acae1c8b",
"versionType": "git",
"status": "affected"
},
{
"version": "5ebf3fc59bd20d17df3ba26159787d13cf20d362",
"lessThan": "57f7fb0d1ac28540c0f6405c829bb9c3b89d8dba",
"versionType": "git",
"status": "affected"
},
{
"version": "5ebf3fc59bd20d17df3ba26159787d13cf20d362",
"lessThan": "85afa9ea122dd9d4a2ead104a951d318975dcd25",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/pci/endpoint/functions/pci-epf-test.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "5.7",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.7",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.157",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.113",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.54",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.17.3",
"lessThanOrEqual": "6.17.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {},
"references": [
{
"url": "https://git.kernel.org/stable/c/0c5ce6b6ccc22d486cc7239ed908cb0ae5363a7b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/57f7fb0d1ac28540c0f6405c829bb9c3b89d8dba",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/6411f840a9b5c47c00ca8e004733de232553870d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/85afa9ea122dd9d4a2ead104a951d318975dcd25",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/fb54ffd60064c4e5139a3eb216e877b1acae1c8b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}