{"id":"CVE-2025-40032","state":"PUBLISHED","title":"PCI: endpoint: pci-epf-test: Add NULL check for DMA channels before release","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]","publishedAt":"2025-10-28T11:48:14.876Z","updatedAt":"2026-05-11T21:41:10.040Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5ebf3fc59bd20d17df3ba26159787d13cf20d362","status":"affected","lessThan":"6411f840a9b5c47c00ca8e004733de232553870d","versionType":"git"},{"version":"5ebf3fc59bd20d17df3ba26159787d13cf20d362","status":"affected","lessThan":"0c5ce6b6ccc22d486cc7239ed908cb0ae5363a7b","versionType":"git"},{"version":"5ebf3fc59bd20d17df3ba26159787d13cf20d362","status":"affected","lessThan":"fb54ffd60064c4e5139a3eb216e877b1acae1c8b","versionType":"git"},{"version":"5ebf3fc59bd20d17df3ba26159787d13cf20d362","status":"affected","lessThan":"57f7fb0d1ac28540c0f6405c829bb9c3b89d8dba","versionType":"git"},{"version":"5ebf3fc59bd20d17df3ba26159787d13cf20d362","status":"affected","lessThan":"85afa9ea122dd9d4a2ead104a951d318975dcd25","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pci/endpoint/functions/pci-epf-test.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.7","versionType":"semver"},{"version":"6.1.157","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.113","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.54","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.3","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pci/endpoint/functions/pci-epf-test.c"]}],"references":["https://git.kernel.org/stable/c/6411f840a9b5c47c00ca8e004733de232553870d","https://git.kernel.org/stable/c/0c5ce6b6ccc22d486cc7239ed908cb0ae5363a7b","https://git.kernel.org/stable/c/fb54ffd60064c4e5139a3eb216e877b1acae1c8b","https://git.kernel.org/stable/c/57f7fb0d1ac28540c0f6405c829bb9c3b89d8dba","https://git.kernel.org/stable/c/85afa9ea122dd9d4a2ead104a951d318975dcd25"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/40xxx/CVE-2025-40032.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-40032","state":"PUBLISHED","datePublished":"2025-10-28T11:48:14.876Z","dateUpdated":"2026-05-11T21:41:10.040Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T07:20:57.153Z"},"containers":{"cna":{"title":"PCI: endpoint: pci-epf-test: Add NULL check for DMA channels before release","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]"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5ebf3fc59bd20d17df3ba26159787d13cf20d362","status":"affected","lessThan":"6411f840a9b5c47c00ca8e004733de232553870d","versionType":"git"},{"version":"5ebf3fc59bd20d17df3ba26159787d13cf20d362","status":"affected","lessThan":"0c5ce6b6ccc22d486cc7239ed908cb0ae5363a7b","versionType":"git"},{"version":"5ebf3fc59bd20d17df3ba26159787d13cf20d362","status":"affected","lessThan":"fb54ffd60064c4e5139a3eb216e877b1acae1c8b","versionType":"git"},{"version":"5ebf3fc59bd20d17df3ba26159787d13cf20d362","status":"affected","lessThan":"57f7fb0d1ac28540c0f6405c829bb9c3b89d8dba","versionType":"git"},{"version":"5ebf3fc59bd20d17df3ba26159787d13cf20d362","status":"affected","lessThan":"85afa9ea122dd9d4a2ead104a951d318975dcd25","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pci/endpoint/functions/pci-epf-test.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.7","versionType":"semver"},{"version":"6.1.157","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.113","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.54","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.3","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pci/endpoint/functions/pci-epf-test.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/6411f840a9b5c47c00ca8e004733de232553870d"},{"url":"https://git.kernel.org/stable/c/0c5ce6b6ccc22d486cc7239ed908cb0ae5363a7b"},{"url":"https://git.kernel.org/stable/c/fb54ffd60064c4e5139a3eb216e877b1acae1c8b"},{"url":"https://git.kernel.org/stable/c/57f7fb0d1ac28540c0f6405c829bb9c3b89d8dba"},{"url":"https://git.kernel.org/stable/c/85afa9ea122dd9d4a2ead104a951d318975dcd25"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:41:10.040Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.1.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.6.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.12.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.17.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.18"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}