{"api_version":"1","generated_at":"2026-10-07T22:56:28+00:00","cve":"CVE-2026-98342","urls":{"html":"https://cve.report/CVE-2026-98342","api":"https://cve.report/api/cve/CVE-2026-98342.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98342","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98342"},"summary":{"title":"dmaengine: wait for RCU readers before releasing dma_device","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: wait for RCU readers before releasing dma_device\n\ndma_issue_pending_all() walks the dma_device_list with\nlist_for_each_entry_rcu() under rcu_read_lock(). dma_device_release()\nunlinks the device with list_del_rcu() and then calls\ndevice->device_release() (which in many drivers, such as plx_dma.c,\ndirectly calls kfree()).\n\nBecause there is no grace period between unlinking the device and\nfreeing it, concurrent RCU readers in dma_issue_pending_all() can\naccess the device after it has been freed.\n\nThe lockless walk originally relied on clients holding a dmaengine\nreference to pin the provider module, and therefore the device, for as\nlong as they might traverse the list. Commit 8ad342a86359 (\"dmaengine:\nAdd reference counting to dma_device struct\") decoupled the dma_device\nlifetime from the module reference, so the device can now be released\nwhile a reader is still walking the list.\n\nAdd synchronize_rcu() before the device is freed, so RCU readers are\nguaranteed to have finished. Keep it unconditional: providers that do\nnot implement device_release() free the device themselves once\ndma_async_device_unregister() returns. This call will delay for a grace\nperiod with dma_list_mutex held, which is safe and only teardown path is\ndelayed.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-06 09:18:27","updated_at":"2026-10-06 09:18:27"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/cbb3310a5167e868a5e763e32b9a23b4d50669ee","name":"https://git.kernel.org/stable/c/cbb3310a5167e868a5e763e32b9a23b4d50669ee","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fc1f4884f1d46fc7a8cee6e2997ecc9e8d1c7f77","name":"https://git.kernel.org/stable/c/fc1f4884f1d46fc7a8cee6e2997ecc9e8d1c7f77","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8577a5ec4f7e00443015ef99f646def093121a1b","name":"https://git.kernel.org/stable/c/8577a5ec4f7e00443015ef99f646def093121a1b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4aed7e47a10b94ea3c5171e8d1382081accd2e03","name":"https://git.kernel.org/stable/c/4aed7e47a10b94ea3c5171e8d1382081accd2e03","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4448a539a0c39141cccc67be6cacde0f35024313","name":"https://git.kernel.org/stable/c/4448a539a0c39141cccc67be6cacde0f35024313","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dc750422170a563c7a81f6e49d36bb02c62ae37f","name":"https://git.kernel.org/stable/c/dc750422170a563c7a81f6e49d36bb02c62ae37f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ac8ce9f89638d6d79875cca7d8ae42566a9bde15","name":"https://git.kernel.org/stable/c/ac8ce9f89638d6d79875cca7d8ae42566a9bde15","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/14578c78405d51fa92e4ada4502a45f537c0fcb8","name":"https://git.kernel.org/stable/c/14578c78405d51fa92e4ada4502a45f537c0fcb8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98342","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98342","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2ba05622b8b143b0c95968ba59bddfbd6d2f2559 ac8ce9f89638d6d79875cca7d8ae42566a9bde15 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2ba05622b8b143b0c95968ba59bddfbd6d2f2559 14578c78405d51fa92e4ada4502a45f537c0fcb8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2ba05622b8b143b0c95968ba59bddfbd6d2f2559 cbb3310a5167e868a5e763e32b9a23b4d50669ee git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2ba05622b8b143b0c95968ba59bddfbd6d2f2559 8577a5ec4f7e00443015ef99f646def093121a1b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2ba05622b8b143b0c95968ba59bddfbd6d2f2559 4448a539a0c39141cccc67be6cacde0f35024313 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2ba05622b8b143b0c95968ba59bddfbd6d2f2559 fc1f4884f1d46fc7a8cee6e2997ecc9e8d1c7f77 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2ba05622b8b143b0c95968ba59bddfbd6d2f2559 4aed7e47a10b94ea3c5171e8d1382081accd2e03 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2ba05622b8b143b0c95968ba59bddfbd6d2f2559 dc750422170a563c7a81f6e49d36bb02c62ae37f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.29","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.29 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.271 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.222 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.189 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.158 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.112 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.54 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.8 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc4 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"98342","cve":"CVE-2026-98342","epss":"0.001840000","percentile":"0.072980000","score_date":"2026-10-06","updated_at":"2026-10-07 00:14:55"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/dma/dmaengine.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"ac8ce9f89638d6d79875cca7d8ae42566a9bde15","status":"affected","version":"2ba05622b8b143b0c95968ba59bddfbd6d2f2559","versionType":"git"},{"lessThan":"14578c78405d51fa92e4ada4502a45f537c0fcb8","status":"affected","version":"2ba05622b8b143b0c95968ba59bddfbd6d2f2559","versionType":"git"},{"lessThan":"cbb3310a5167e868a5e763e32b9a23b4d50669ee","status":"affected","version":"2ba05622b8b143b0c95968ba59bddfbd6d2f2559","versionType":"git"},{"lessThan":"8577a5ec4f7e00443015ef99f646def093121a1b","status":"affected","version":"2ba05622b8b143b0c95968ba59bddfbd6d2f2559","versionType":"git"},{"lessThan":"4448a539a0c39141cccc67be6cacde0f35024313","status":"affected","version":"2ba05622b8b143b0c95968ba59bddfbd6d2f2559","versionType":"git"},{"lessThan":"fc1f4884f1d46fc7a8cee6e2997ecc9e8d1c7f77","status":"affected","version":"2ba05622b8b143b0c95968ba59bddfbd6d2f2559","versionType":"git"},{"lessThan":"4aed7e47a10b94ea3c5171e8d1382081accd2e03","status":"affected","version":"2ba05622b8b143b0c95968ba59bddfbd6d2f2559","versionType":"git"},{"lessThan":"dc750422170a563c7a81f6e49d36bb02c62ae37f","status":"affected","version":"2ba05622b8b143b0c95968ba59bddfbd6d2f2559","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/dma/dmaengine.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.29"},{"lessThan":"2.6.29","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.271","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.222","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.189","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.158","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.112","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.54","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.8","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc4","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.271","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.222","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.189","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.158","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.112","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.54","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.8","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc4","versionStartIncluding":"2.6.29","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: wait for RCU readers before releasing dma_device\n\ndma_issue_pending_all() walks the dma_device_list with\nlist_for_each_entry_rcu() under rcu_read_lock(). dma_device_release()\nunlinks the device with list_del_rcu() and then calls\ndevice->device_release() (which in many drivers, such as plx_dma.c,\ndirectly calls kfree()).\n\nBecause there is no grace period between unlinking the device and\nfreeing it, concurrent RCU readers in dma_issue_pending_all() can\naccess the device after it has been freed.\n\nThe lockless walk originally relied on clients holding a dmaengine\nreference to pin the provider module, and therefore the device, for as\nlong as they might traverse the list. Commit 8ad342a86359 (\"dmaengine:\nAdd reference counting to dma_device struct\") decoupled the dma_device\nlifetime from the module reference, so the device can now be released\nwhile a reader is still walking the list.\n\nAdd synchronize_rcu() before the device is freed, so RCU readers are\nguaranteed to have finished. Keep it unconditional: providers that do\nnot implement device_release() free the device themselves once\ndma_async_device_unregister() returns. This call will delay for a grace\nperiod with dma_list_mutex held, which is safe and only teardown path is\ndelayed."}],"providerMetadata":{"dateUpdated":"2026-10-06T08:46:32.366Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/ac8ce9f89638d6d79875cca7d8ae42566a9bde15"},{"url":"https://git.kernel.org/stable/c/14578c78405d51fa92e4ada4502a45f537c0fcb8"},{"url":"https://git.kernel.org/stable/c/cbb3310a5167e868a5e763e32b9a23b4d50669ee"},{"url":"https://git.kernel.org/stable/c/8577a5ec4f7e00443015ef99f646def093121a1b"},{"url":"https://git.kernel.org/stable/c/4448a539a0c39141cccc67be6cacde0f35024313"},{"url":"https://git.kernel.org/stable/c/fc1f4884f1d46fc7a8cee6e2997ecc9e8d1c7f77"},{"url":"https://git.kernel.org/stable/c/4aed7e47a10b94ea3c5171e8d1382081accd2e03"},{"url":"https://git.kernel.org/stable/c/dc750422170a563c7a81f6e49d36bb02c62ae37f"}],"title":"dmaengine: wait for RCU readers before releasing dma_device","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98342","datePublished":"2026-10-06T08:46:32.366Z","dateReserved":"2026-09-25T10:25:14.342Z","dateUpdated":"2026-10-06T08:46:32.366Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-06 09:18:27","lastModifiedDate":"2026-10-06 09:18:27","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98342","Ordinal":"1","Title":"dmaengine: wait for RCU readers before releasing dma_device","CVE":"CVE-2026-98342","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98342","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: wait for RCU readers before releasing dma_device\n\ndma_issue_pending_all() walks the dma_device_list with\nlist_for_each_entry_rcu() under rcu_read_lock(). dma_device_release()\nunlinks the device with list_del_rcu() and then calls\ndevice->device_release() (which in many drivers, such as plx_dma.c,\ndirectly calls kfree()).\n\nBecause there is no grace period between unlinking the device and\nfreeing it, concurrent RCU readers in dma_issue_pending_all() can\naccess the device after it has been freed.\n\nThe lockless walk originally relied on clients holding a dmaengine\nreference to pin the provider module, and therefore the device, for as\nlong as they might traverse the list. Commit 8ad342a86359 (\"dmaengine:\nAdd reference counting to dma_device struct\") decoupled the dma_device\nlifetime from the module reference, so the device can now be released\nwhile a reader is still walking the list.\n\nAdd synchronize_rcu() before the device is freed, so RCU readers are\nguaranteed to have finished. Keep it unconditional: providers that do\nnot implement device_release() free the device themselves once\ndma_async_device_unregister() returns. This call will delay for a grace\nperiod with dma_list_mutex held, which is safe and only teardown path is\ndelayed.","Type":"Description","Title":"dmaengine: wait for RCU readers before releasing dma_device"}]}}}