{"id":"AZL-101988","summary":"CVE-2026-93042 affecting package kernel 6.6.150.1-1","details":"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/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.","modified":"2026-09-19T05:33:49Z","published":"2026-09-17T17:17:57Z","upstream":["CVE-2026-93042"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93042"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"6.6.150.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-101988.json"}}],"schema_version":"1.9.0"}