{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72476", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.934Z", "datePublished": "2026-08-15T05:57:16.396Z", "dateUpdated": "2026-08-17T05:44:40.606Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:44:40.606Z"}, "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": {"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"}, "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."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/dma/dmaengine.c"], "versions": [{"version": "0f571515c332e00b3515dbe0859ceaa30ab66e00", "lessThan": "444f96066937f3fdf0e79b53289cff223c7d638b", "status": "affected", "versionType": "git"}, {"version": "0f571515c332e00b3515dbe0859ceaa30ab66e00", "lessThan": "ab438a9efb9042c79d2f8db28a326d55feb8591f", "status": "affected", "versionType": "git"}, {"version": "0f571515c332e00b3515dbe0859ceaa30ab66e00", "lessThan": "9bdc8dce4068dadbdf7cf5ad6d4983e2afffedce", "status": "affected", "versionType": "git"}, {"version": "0f571515c332e00b3515dbe0859ceaa30ab66e00", "lessThan": "5876f38b67a309c00628942cb25679749b53b397", "status": "affected", "versionType": "git"}, {"version": "0f571515c332e00b3515dbe0859ceaa30ab66e00", "lessThan": "3b0240483dc977dbec4f3bc7a5383d4691ecb625", "status": "affected", "versionType": "git"}, {"version": "0f571515c332e00b3515dbe0859ceaa30ab66e00", "lessThan": "329ec20a86091d2a6e5b4fe507545e7d678a22a2", "status": "affected", "versionType": "git"}, {"version": "0f571515c332e00b3515dbe0859ceaa30ab66e00", "lessThan": "0bc191050c3253da8ef4bfaf157c44efed6e22cd", "status": "affected", "versionType": "git"}, {"version": "0f571515c332e00b3515dbe0859ceaa30ab66e00", "lessThan": "92f853f0645aebf1d05d333e97ab7c342ace1892", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/dma/dmaengine.c"], "versions": [{"version": "2.6.30", "status": "affected"}, {"version": "0", "lessThan": "2.6.30", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "5.10.261"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "7.2"}]}]}], "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"}}}}

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{"affected": [{"affectedData": [{"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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-72476", "lastModified": "2026-08-17T06:19:15.607", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-15T06:22:21.757", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0bc191050c3253da8ef4bfaf157c44efed6e22cd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/329ec20a86091d2a6e5b4fe507545e7d678a22a2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3b0240483dc977dbec4f3bc7a5383d4691ecb625"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/444f96066937f3fdf0e79b53289cff223c7d638b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5876f38b67a309c00628942cb25679749b53b397"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/92f853f0645aebf1d05d333e97ab7c342ace1892"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9bdc8dce4068dadbdf7cf5ad6d4983e2afffedce"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ab438a9efb9042c79d2f8db28a326d55feb8591f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: dmaengine: Fix possible use after free", "id": "2516293", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516293"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndmaengine: Fix possible use after free\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.\nFixes it by moving dma_chan_put() after the check.", "A flaw was found in the dmaengine component of the Linux kernel. This flaw occurs in the `dma_release_channel()` function due to an incorrect order of operations, where a channel's reference count is decremented before verifying if the device is still in use. This can lead to a use-after-free vulnerability, potentially causing system instability or a denial of service."], "name": "CVE-2026-72476", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72476\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72476\nhttps://lore.kernel.org/linux-cve-announce/2026081536-CVE-2026-72476-d0b7@gregkh/T"], "threat_severity": "Moderate"}

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