CVE-2025-40032 Details
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]
A vulnerability in the Linux kernel's PCI endpoint function can lead to a NULL pointer dereference, causing a kernel panic. This issue arises in the 'pci-epf-test' function, where the DMA channel fields 'dma_chan_tx' and 'dma_chan_rx' can be NULL even after initialization. The vulnerability affects the Linux kernel stable tree.
Users can upgrade to the latest version of the Linux kernel stable tree, where this vulnerability has been addressed. Instructions for downloading the patched version are available in the Linux kernel Git repository.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 28, 2025References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/0c5ce6b6ccc22d486cc7239ed908cb0ae5363a7b | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/57f7fb0d1ac28540c0f6405c829bb9c3b89d8dba | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/6411f840a9b5c47c00ca8e004733de232553870d | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/85afa9ea122dd9d4a2ead104a951d318975dcd25 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/fb54ffd60064c4e5139a3eb216e877b1acae1c8b | kernel.org | Source CodeVendor |
Weakness Enumeration
No weakness enumeration is available for this CVE.
Affected Products
| Product | Versions |
|---|---|
| Linux kernel | All versions |
CPE
Remediation
| |
| Linux kernel | All versions |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Oct 28, 2025 | New CVE Received | kernel.org |