{"id":"CVE-2026-93042","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: dw-edma: Terminate all descriptors without callbacks\n\nThe DMA Engine client documentation says in the \"Terminate APIs\" section\nof Documentation/driver-api/dm…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: dw-edma: Terminate all descriptors without callbacks\n\nThe DMA Engine client documentation says in the \"Terminate APIs\" section\nof Documentation/driver-api/dm…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf < 65e387b95d3855aa894ac729e1778e5bcb9083cb","Linux >= e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf < 4793f9099a1cadf4e37f3a03d524af6bce88a0ea","Linux >= e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf < be87d86537de7ea6fd025f41033d2faff880973f","Linux >= e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf < f3ec6702a1d216be61f692cc0a983d6c8fb5ebf7","Linux >= e63d79d1ffcd2201a2dbff1d7a1184b8f3ec74cf < 99109a51efd28c9a661fbfb9469b023c517b31d1","Linux 5.3"],"published":"2026-09-17","updated":"2026-09-18","sourceUpdated":"2026-09-18T18:18:18.930","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93042","references":[{"url":"https://git.kernel.org/stable/c/4793f9099a1cadf4e37f3a03d524af6bce88a0ea","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/65e387b95d3855aa894ac729e1778e5bcb9083cb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/99109a51efd28c9a661fbfb9469b023c517b31d1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/be87d86537de7ea6fd025f41033d2faff880973f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f3ec6702a1d216be61f692cc0a983d6c8fb5ebf7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00333,"epssPercentile":0.26711,"ingestedAt":"2026-09-17T16:21:47.773Z","slug":"CVE-2026-93042","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: dw-edma: Terminate all descriptors without callbacks\n\nThe DMA Engine client documentation says in the \"Terminate APIs\" section\nof Documentation/driver-api/dmaengine/client.rst:\n\n\"No callback functions will be called for any incomplete transfers.\"\n\ndw-edma instead calls vchan_cookie_complete() when a deferred STOP reaches\nthe interrupt handler. This schedules a callback for the active descriptor\nand leaves other issued or submitted descriptors queued. A late callback\nafter dmaengine_terminate_sync() can dereference client state that has\nalready been freed, while leftover descriptors may later restart into\nreused buffers or leak.\n\nMove all issued and submitted descriptors to the terminated list whenever\ntermination completes. For a pending STOP, do this from both the DONE and\nABORT paths. Complete their cookies in order without scheduling callbacks.\n\nA STOP can remain pending until the running transfer raises an\ninterrupt. Make device_synchronize() wait for such a pending STOP to\ncomplete before releasing terminated descriptors. Reuse it from\nfree_chan_resources(), then release the remaining virt-dma resources.\nSleep instead of busy-polling while waiting, and warn if the existing\ntimeout expires.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":207353,"id":"CVE-2026-93042","ts":1789757341183,"field":"cvss","old":null,"new":"8.8"},{"seq":207352,"id":"CVE-2026-93042","ts":1789757341183,"field":"severity","old":"none","new":"high"}]}