{"api_version":"1","generated_at":"2026-09-12T00:34:10+00:00","cve":"CVE-2026-72476","urls":{"html":"https://cve.report/CVE-2026-72476","api":"https://cve.report/api/cve/CVE-2026-72476.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-72476","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-72476"},"summary":{"title":"dmaengine: Fix possible use after free","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: Fix possible use after free\n\nIn dma_release_channel(), check chan->device->privatecnt after call\ndma_chan_put(). However, dma_chan_put() call dma_device_put() which could\nrelease the last reference of the device if the DMA provider is already\ngone and hence free it.\n\nFixes it by moving dma_chan_put() after the check.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:22:21","updated_at":"2026-08-17 06:19:15"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/444f96066937f3fdf0e79b53289cff223c7d638b","name":"https://git.kernel.org/stable/c/444f96066937f3fdf0e79b53289cff223c7d638b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ab438a9efb9042c79d2f8db28a326d55feb8591f","name":"https://git.kernel.org/stable/c/ab438a9efb9042c79d2f8db28a326d55feb8591f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/329ec20a86091d2a6e5b4fe507545e7d678a22a2","name":"https://git.kernel.org/stable/c/329ec20a86091d2a6e5b4fe507545e7d678a22a2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0bc191050c3253da8ef4bfaf157c44efed6e22cd","name":"https://git.kernel.org/stable/c/0bc191050c3253da8ef4bfaf157c44efed6e22cd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3b0240483dc977dbec4f3bc7a5383d4691ecb625","name":"https://git.kernel.org/stable/c/3b0240483dc977dbec4f3bc7a5383d4691ecb625","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9bdc8dce4068dadbdf7cf5ad6d4983e2afffedce","name":"https://git.kernel.org/stable/c/9bdc8dce4068dadbdf7cf5ad6d4983e2afffedce","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/92f853f0645aebf1d05d333e97ab7c342ace1892","name":"https://git.kernel.org/stable/c/92f853f0645aebf1d05d333e97ab7c342ace1892","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5876f38b67a309c00628942cb25679749b53b397","name":"https://git.kernel.org/stable/c/5876f38b67a309c00628942cb25679749b53b397","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-72476","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72476","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0f571515c332e00b3515dbe0859ceaa30ab66e00 444f96066937f3fdf0e79b53289cff223c7d638b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0f571515c332e00b3515dbe0859ceaa30ab66e00 ab438a9efb9042c79d2f8db28a326d55feb8591f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0f571515c332e00b3515dbe0859ceaa30ab66e00 9bdc8dce4068dadbdf7cf5ad6d4983e2afffedce git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0f571515c332e00b3515dbe0859ceaa30ab66e00 5876f38b67a309c00628942cb25679749b53b397 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0f571515c332e00b3515dbe0859ceaa30ab66e00 3b0240483dc977dbec4f3bc7a5383d4691ecb625 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0f571515c332e00b3515dbe0859ceaa30ab66e00 329ec20a86091d2a6e5b4fe507545e7d678a22a2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0f571515c332e00b3515dbe0859ceaa30ab66e00 0bc191050c3253da8ef4bfaf157c44efed6e22cd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0f571515c332e00b3515dbe0859ceaa30ab66e00 92f853f0645aebf1d05d333e97ab7c342ace1892 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.30","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.30 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.261 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.212 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"72476","cve":"CVE-2026-72476","epss":"0.001710000","percentile":"0.068280000","score_date":"2026-08-17","updated_at":"2026-08-18 00:11:47"},"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":"444f96066937f3fdf0e79b53289cff223c7d638b","status":"affected","version":"0f571515c332e00b3515dbe0859ceaa30ab66e00","versionType":"git"},{"lessThan":"ab438a9efb9042c79d2f8db28a326d55feb8591f","status":"affected","version":"0f571515c332e00b3515dbe0859ceaa30ab66e00","versionType":"git"},{"lessThan":"9bdc8dce4068dadbdf7cf5ad6d4983e2afffedce","status":"affected","version":"0f571515c332e00b3515dbe0859ceaa30ab66e00","versionType":"git"},{"lessThan":"5876f38b67a309c00628942cb25679749b53b397","status":"affected","version":"0f571515c332e00b3515dbe0859ceaa30ab66e00","versionType":"git"},{"lessThan":"3b0240483dc977dbec4f3bc7a5383d4691ecb625","status":"affected","version":"0f571515c332e00b3515dbe0859ceaa30ab66e00","versionType":"git"},{"lessThan":"329ec20a86091d2a6e5b4fe507545e7d678a22a2","status":"affected","version":"0f571515c332e00b3515dbe0859ceaa30ab66e00","versionType":"git"},{"lessThan":"0bc191050c3253da8ef4bfaf157c44efed6e22cd","status":"affected","version":"0f571515c332e00b3515dbe0859ceaa30ab66e00","versionType":"git"},{"lessThan":"92f853f0645aebf1d05d333e97ab7c342ace1892","status":"affected","version":"0f571515c332e00b3515dbe0859ceaa30ab66e00","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":"2.6.30"},{"lessThan":"2.6.30","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.261","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.212","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.261","versionStartIncluding":"2.6.30","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.212","versionStartIncluding":"2.6.30","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"2.6.30","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"2.6.30","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"2.6.30","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"2.6.30","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"2.6.30","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"2.6.30","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: Fix possible use after free\n\nIn dma_release_channel(), check chan->device->privatecnt after call\ndma_chan_put(). However, dma_chan_put() call dma_device_put() which could\nrelease the last reference of the device if the DMA provider is already\ngone and hence free it.\n\nFixes it by moving dma_chan_put() after the check."}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - The flaw is in dma_release_channel() in drivers/dma/dmaengine.c, reached only when kernel client drivers release a privately requested DMA channel during probe/remove/error teardown triggered by local device access (e.g., /dev/iio:device*, /dev/snd/*, /dev/tty*, spidev), not from any network packet or remote protocol handler.\nAC:L - An attacker can hold a DMA slave channel open via a client device, then close it to call dma_release_channel(); when the DMA provider has already unregistered via unbind, hot-unplug, or module teardown, dma_chan_put() frees dma_device and the subsequent privatecnt access is a reliably triggerable UAF with attacker-controlled release timing.\nPR:L - Exploitation requires only a local unprivileged process able to open a device whose driver uses dma_request_chan() or dma_request_channel(); on embedded ADI FPGA, Android, and industrial platforms, non-root application users commonly have such device-node access without init-namespace root or CAP_SYS_ADMIN.\nUI:N - No victim interaction is required beyond the attacker opening, holding, and closing their own device handle or racing driver teardown; no other user must mount filesystems, approve prompts, or perform separate actions for exploitation to succeed.\nS:U - This is a kernel slab use-after-free in the dmaengine channel-release path affecting the same kernel security authority; it does not cross VM, IOMMU, container, or other sandbox boundaries and is standard in-kernel memory corruption rather than a scope change.\nC:H - After dma_chan_put() frees the last dma_device kref, the code reads and decrements privatecnt and may clear cap_mask on freed kmalloc memory; UAF on dma_device objects enables disclosure of attacker-influenced freed-heap contents per kernel UAF scoring guidance.\nI:H - Post-free modification of privatecnt and cap_mask corrupts reused slab objects under attacker influence, providing a plausible kernel heap corruption path toward arbitrary write primitives, control-flow hijacking, or local privilege escalation.\nA:H - Dereferencing freed dma_device memory during dma_release_channel() can cause KASAN slab-use-after-free reports, kernel oops, BUG, or panic; kernel guidance treats any use-after-free as high availability impact even when full exploitation is not demonstrated."}]}],"providerMetadata":{"dateUpdated":"2026-08-17T05:44:40.606Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/444f96066937f3fdf0e79b53289cff223c7d638b"},{"url":"https://git.kernel.org/stable/c/ab438a9efb9042c79d2f8db28a326d55feb8591f"},{"url":"https://git.kernel.org/stable/c/9bdc8dce4068dadbdf7cf5ad6d4983e2afffedce"},{"url":"https://git.kernel.org/stable/c/5876f38b67a309c00628942cb25679749b53b397"},{"url":"https://git.kernel.org/stable/c/3b0240483dc977dbec4f3bc7a5383d4691ecb625"},{"url":"https://git.kernel.org/stable/c/329ec20a86091d2a6e5b4fe507545e7d678a22a2"},{"url":"https://git.kernel.org/stable/c/0bc191050c3253da8ef4bfaf157c44efed6e22cd"},{"url":"https://git.kernel.org/stable/c/92f853f0645aebf1d05d333e97ab7c342ace1892"}],"title":"dmaengine: Fix possible use after free","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-72476","datePublished":"2026-08-15T05:57:16.396Z","dateReserved":"2026-08-09T03:40:39.934Z","dateUpdated":"2026-08-17T05:44:40.606Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:22:21","lastModifiedDate":"2026-08-17 06:19:15","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"72476","Ordinal":"1","Title":"dmaengine: Fix possible use after free","CVE":"CVE-2026-72476","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"72476","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: Fix possible use after free\n\nIn dma_release_channel(), check chan->device->privatecnt after call\ndma_chan_put(). However, dma_chan_put() call dma_device_put() which could\nrelease the last reference of the device if the DMA provider is already\ngone and hence free it.\n\nFixes it by moving dma_chan_put() after the check.","Type":"Description","Title":"dmaengine: Fix possible use after free"}]}}}