{"id":"CVE-2025-71186","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: stm32: dmamux: fix device leak on route allocation\n\nMake sure to drop the reference taken when looking up the DMA mux\nplatform device during route allocation…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: stm32: dmamux: fix device leak on route allocation\n\nMake sure to drop the reference taken when looking up the DMA mux\nplatform device during route allocation…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-401"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 4.15.1, < 5.10.249","linux_kernel >= 5.11, < 5.15.199","linux_kernel >= 5.16, < 6.1.162","linux_kernel >= 6.2, < 6.6.122","linux_kernel >= 6.7, < 6.12.67","linux_kernel >= 6.13, < 6.18.7","linux_kernel = 4.15","linux_kernel = 6.19"],"patched":["linux_kernel 6.18.7"],"published":"2026-01-31","updated":"2026-10-15","sourceUpdated":"2026-10-15T02:18:24.327","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-71186","references":[{"url":"https://git.kernel.org/stable/c/1a179ac01ff3993ab97e33cc77c316ed7415cda1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/1dda2a32303df0091896b01a9d09070d61fa344c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2fb10259d4efb4367787b5ae9c94192e8a91c648","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3b42020e6790a5e19b36c187ed5b488a5716f97f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3ef52d31cce8ba816739085a61efe07b63c6cf27","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6393da54dcb3488c080a183c4182ddec71ba8d7f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/dd6e4943889fb354efa3f700e42739da9bddb6ef","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-253495.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-457936.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00215,"epssPercentile":0.11858,"ingestedAt":"2026-09-08T15:33:26.994Z","slug":"CVE-2025-71186","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: stm32: dmamux: fix device leak on route allocation\n\nMake sure to drop the reference taken when looking up the DMA mux\nplatform device during route allocation.\n\nNote that holding a reference to a device does not prevent its driver\ndata from going away so there is no point in keeping the reference.\n\n## Affected\n\n- `linux_kernel >= 4.15.1, < 5.10.249`\n- `linux_kernel >= 5.11, < 5.15.199`\n- `linux_kernel >= 5.16, < 6.1.162`\n- `linux_kernel >= 6.2, < 6.6.122`\n- `linux_kernel >= 6.7, < 6.12.67`\n- `linux_kernel >= 6.13, < 6.18.7`\n- `linux_kernel = 4.15`\n- `linux_kernel = 6.19`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.18.7`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":221603,"id":"CVE-2025-71186","ts":1792035287771,"field":"cvss","old":null,"new":"5.5"},{"seq":221602,"id":"CVE-2025-71186","ts":1792035287771,"field":"severity","old":"none","new":"medium"}]}