{"cve":"CVE-2025-40032","nvd":{"published":"2025-10-28T12:15:37.010","modified":"2026-10-19T21:10:00.160","status":"Deferred","description":"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]","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/0c5ce6b6ccc22d486cc7239ed908cb0ae5363a7b","https://git.kernel.org/stable/c/57f7fb0d1ac28540c0f6405c829bb9c3b89d8dba","https://git.kernel.org/stable/c/6411f840a9b5c47c00ca8e004733de232553870d","https://git.kernel.org/stable/c/85afa9ea122dd9d4a2ead104a951d318975dcd25","https://git.kernel.org/stable/c/fb54ffd60064c4e5139a3eb216e877b1acae1c8b"],"products":[],"source":"nvd","synced_at":"2026-10-21T03:43:09.190223697+00:00"},"epss":{"cve":"CVE-2025-40032","score":0.00216,"percentile":0.11854,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}