CVE-2025-71221

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-71221", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-02-14T16:26:02.969Z", "datePublished": "2026-02-14T16:27:04.631Z", "dateUpdated": "2026-11-10T12:39:37.538Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:12:33.785Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: mmp_pdma: Fix race condition in mmp_pdma_residue()\n\nAdd proper locking in mmp_pdma_residue() to prevent use-after-free when\naccessing descriptor list and descriptor contents.\n\nThe race occurs when multiple threads call tx_status() while the tasklet\non another CPU is freeing completed descriptors:\n\nCPU 0 CPU 1\n----- -----\nmmp_pdma_tx_status()\nmmp_pdma_residue()\n -> NO LOCK held\n list_for_each_entry(sw, ..)\n DMA interrupt\n dma_do_tasklet()\n -> spin_lock(&desc_lock)\n list_move(sw->node, ...)\n spin_unlock(&desc_lock)\n | dma_pool_free(sw) <- FREED!\n -> access sw->desc <- UAF!\n\nThis issue can be reproduced when running dmatest on the same channel with\nmultiple threads (threads_per_chan > 1).\n\nFix by protecting the chain_running list iteration and descriptor access\nwith the chan->desc_lock spinlock."}], "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 vulnerable DMA status path is reached through local DMAengine clients or device operations, not directly through network packets or physical insertion.\nAC:L - An attacker can repeatedly issue concurrent non-cyclic transfers and status queries, controlling the workload that produces both descriptor completion and stale traversal without relying on an uncontrollable condition.\nPR:L - Although the demonstrated dmatest configuration is normally root-controlled, userspace-accessible DMA clients are reasonable on affected embedded deployments and the provider performs no capability check. Following the highest-severity rule, a basic local user is sufficient.\nUI:N - Exploitation requires no action by another user after the attacker initiates the concurrent DMA operations.\nS:U - The UAF compromises the same host kernel security authority; it does not inherently cross a guest-host, sandbox, or IOMMU boundary.\nC:H - The descriptor and list links are accessed after dma_pool_free() and may contain recycled attacker-influenced contents; under the required UAF guidance this has high confidentiality impact.\nI:H - The kernel UAF permits freed descriptor storage to be reclaimed while stale references remain, making heap manipulation and code-execution primitives defensible under the supplied scoring guidance.\nA:H - Freed or poisoned list pointers can be dereferenced during iteration, causing a kernel oops or panic, and the race can be triggered repeatedly."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/dma/mmp_pdma.c"], "versions": [{"version": "1b38da264674d6a0fe26a63996b8f88b88c3da48", "lessThan": "3f0e0e2d9e752570041e95fd04635e2580097819", "status": "affected", "versionType": "git"}, {"version": "1b38da264674d6a0fe26a63996b8f88b88c3da48", "lessThan": "dfb5e05227745de43b7fd589721817a4337c970d", "status": "affected", "versionType": "git"}, {"version": "1b38da264674d6a0fe26a63996b8f88b88c3da48", "lessThan": "eba0c75670c022cb1f948600db972524bcfe8166", "status": "affected", "versionType": "git"}, {"version": "1b38da264674d6a0fe26a63996b8f88b88c3da48", "lessThan": "fc023b8fab057f0c910856ff36d3e12a30b7af4a", "status": "affected", "versionType": "git"}, {"version": "1b38da264674d6a0fe26a63996b8f88b88c3da48", "lessThan": "9f665b3c3d9a168410251f27a5d019b7bf93185c", "status": "affected", "versionType": "git"}, {"version": "1b38da264674d6a0fe26a63996b8f88b88c3da48", "lessThan": "a143545855bc2c6e1330f6f57ae375ac44af00a7", "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/mmp_pdma.c"], "versions": [{"version": "3.16", "status": "affected"}, {"version": "0", "lessThan": "3.16", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.167", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.130", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.78", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.10", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19", "lessThanOrEqual": "*", "status": "unaffected", 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{}

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(6AG1518-4AX00-4AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.5", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}], "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D20A40DD-5043-4C92-9FB6-C88CA3BBEECE", "versionEndExcluding": "6.18.10", "versionStartIncluding": "3.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*", "matchCriteriaId": "17B67AA7-40D6-4AFA-8459-F200F3D7CFD1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*", "matchCriteriaId": "C47E4CC9-C826-4FA9-B014-7FE3D9B318B2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*", "matchCriteriaId": "F71D92C0-C023-48BD-B3B6-70B638EEE298", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*", "matchCriteriaId": "13580667-0A98-40CC-B29F-D12790B91BDB", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*", "matchCriteriaId": "CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: mmp_pdma: Fix race condition in mmp_pdma_residue()\n\nAdd proper locking in mmp_pdma_residue() to prevent use-after-free when\naccessing descriptor list and descriptor contents.\n\nThe race occurs when multiple threads call tx_status() while the tasklet\non another CPU is freeing completed descriptors:\n\nCPU 0 CPU 1\n----- -----\nmmp_pdma_tx_status()\nmmp_pdma_residue()\n -> NO LOCK held\n list_for_each_entry(sw, ..)\n DMA interrupt\n dma_do_tasklet()\n -> spin_lock(&desc_lock)\n list_move(sw->node, ...)\n spin_unlock(&desc_lock)\n | dma_pool_free(sw) <- FREED!\n -> access sw->desc <- UAF!\n\nThis issue can be reproduced when running dmatest on the same channel with\nmultiple threads (threads_per_chan > 1).\n\nFix by protecting the chain_running list iteration and descriptor access\nwith the chan->desc_lock spinlock."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndmaengine: mmp_pdma: Correcci\u00f3n de condici\u00f3n de carrera en mmp_pdma_residue()\n\nA\u00f1adir bloqueo adecuado en mmp_pdma_residue() para prevenir uso despu\u00e9s de liberaci\u00f3n al acceder a la lista de descriptores y al contenido del descriptor.\n\nLa condici\u00f3n de carrera ocurre cuando m\u00faltiples hilos llaman a tx_status() mientras el tasklet en otra CPU est\u00e1 liberando descriptores completados:\n\nCPU 0 CPU 1\n----- -----\nmmp_pdma_tx_status()\nmmp_pdma_residue()\n -&gt; SIN BLOQUEO mantenido\n list_for_each_entry(sw, ..)\n Interrupci\u00f3n DMA\n dma_do_tasklet()\n -&gt; spin_lock(&amp;desc_lock)\n list_move(sw-&gt;node, ...)\n spin_unlock(&amp;desc_lock)\n | dma_pool_free(sw) &lt;- \u00a1LIBERADO!\n -&gt; acceso a sw-&gt;desc &lt;- \u00a1UAF!\n\nEste problema puede ser reproducido al ejecutar dmatest en el mismo canal con m\u00faltiples hilos (hilos_por_canal &gt; 1).\n\nSoluci\u00f3n protegiendo la iteraci\u00f3n de la lista chain_running y el acceso al descriptor con el spinlock chan-&gt;desc_lock."}], "id": "CVE-2025-71221", "lastModified": "2026-11-10T13:18:08.930", "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"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-02-14T17:15:54.450", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3f0e0e2d9e752570041e95fd04635e2580097819"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9f665b3c3d9a168410251f27a5d019b7bf93185c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a143545855bc2c6e1330f6f57ae375ac44af00a7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dfb5e05227745de43b7fd589721817a4337c970d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/eba0c75670c022cb1f948600db972524bcfe8166"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fc023b8fab057f0c910856ff36d3e12a30b7af4a"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: dmaengine: mmp_pdma: Fix race condition in mmp_pdma_residue()", "id": "2439909", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2439909"}, "csaw": false, "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndmaengine: mmp_pdma: Fix race condition in mmp_pdma_residue()\nAdd proper locking in mmp_pdma_residue() to prevent use-after-free when\naccessing descriptor list and descriptor contents.\nThe race occurs when multiple threads call tx_status() while the tasklet\non another CPU is freeing completed descriptors:\nCPU 0 CPU 1\n----- -----\nmmp_pdma_tx_status()\nmmp_pdma_residue()\n-> NO LOCK held\nlist_for_each_entry(sw, ..)\nDMA interrupt\ndma_do_tasklet()\n-> spin_lock(&desc_lock)\nlist_move(sw->node, ...)\nspin_unlock(&desc_lock)\n| dma_pool_free(sw) <- FREED!\n-> access sw->desc <- UAF!\nThis issue can be reproduced when running dmatest on the same channel with\nmultiple threads (threads_per_chan > 1).\nFix by protecting the chain_running list iteration and descriptor access\nwith the chan->desc_lock spinlock."], "name": "CVE-2025-71221", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-02-14T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-71221\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-71221\nhttps://lore.kernel.org/linux-cve-announce/2026021426-CVE-2025-71221-2987@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2026-02-16T09:44:10.117258+00:00", "updated": "2026-02-16T09:44:10.117335+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}