ghsa-4chp-rv27-mr56
Vulnerability from github
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]
{
"affected": [],
"aliases": [
"CVE-2025-40032"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-28T12:15:37Z",
"severity": null
},
"details": "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": "GHSA-4chp-rv27-mr56",
"modified": "2025-10-28T12:30:16Z",
"published": "2025-10-28T12:30:16Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40032"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0c5ce6b6ccc22d486cc7239ed908cb0ae5363a7b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/57f7fb0d1ac28540c0f6405c829bb9c3b89d8dba"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6411f840a9b5c47c00ca8e004733de232553870d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/85afa9ea122dd9d4a2ead104a951d318975dcd25"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fb54ffd60064c4e5139a3eb216e877b1acae1c8b"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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