FKIE_CVE-2025-40032
Vulnerability from fkie_nvd - Published: 2025-10-28 12:15 - Updated: 2026-06-17 09:21
Severity
Summary
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]
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/pci/endpoint/functions/pci-epf-test.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "6411f840a9b5c47c00ca8e004733de232553870d",
"status": "affected",
"version": "5ebf3fc59bd20d17df3ba26159787d13cf20d362",
"versionType": "git"
},
{
"lessThan": "0c5ce6b6ccc22d486cc7239ed908cb0ae5363a7b",
"status": "affected",
"version": "5ebf3fc59bd20d17df3ba26159787d13cf20d362",
"versionType": "git"
},
{
"lessThan": "fb54ffd60064c4e5139a3eb216e877b1acae1c8b",
"status": "affected",
"version": "5ebf3fc59bd20d17df3ba26159787d13cf20d362",
"versionType": "git"
},
{
"lessThan": "57f7fb0d1ac28540c0f6405c829bb9c3b89d8dba",
"status": "affected",
"version": "5ebf3fc59bd20d17df3ba26159787d13cf20d362",
"versionType": "git"
},
{
"lessThan": "85afa9ea122dd9d4a2ead104a951d318975dcd25",
"status": "affected",
"version": "5ebf3fc59bd20d17df3ba26159787d13cf20d362",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/pci/endpoint/functions/pci-epf-test.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.7"
},
{
"lessThan": "5.7",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.157",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.113",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.54",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.17.*",
"status": "unaffected",
"version": "6.17.3",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.18",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"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]"
}
],
"id": "CVE-2025-40032",
"lastModified": "2026-06-17T09:21:09.157",
"metrics": {},
"published": "2025-10-28T12:15:37.010",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"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"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Deferred"
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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