{"id":"CVE-2026-68211","title":"media: stm32-dcmipp: Return queued buffers on start_streaming() failure","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: stm32-dcmipp: Return queued buffers on start_streaming() failure\n\nThe vb2 framework hands buffers to the driver via buf_queue() before\ncalling start_streaming().…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 28e0f37722965fa150af31d82101c95fd21aef60 < c1800238a60b0584b1924f11ce38ec8aba533238","Linux >= 28e0f37722965fa150af31d82101c95fd21aef60 < ed342a86bb2f9c1b44a0fc4f6b08c14073946e4f","Linux >= 28e0f37722965fa150af31d82101c95fd21aef60 < 624af2d4b5e9d3dd366538e4fb4a2a037792a7e3","Linux >= 28e0f37722965fa150af31d82101c95fd21aef60 < ffc8eec06378a340d708c889184ab3e14b57d540","Linux 6.8"],"published":"2026-08-10","updated":"2026-10-21","sourceUpdated":"2026-10-21T12:43:33.155Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68211","references":[{"url":"https://git.kernel.org/stable/c/c1800238a60b0584b1924f11ce38ec8aba533238"},{"url":"https://git.kernel.org/stable/c/ed342a86bb2f9c1b44a0fc4f6b08c14073946e4f"},{"url":"https://git.kernel.org/stable/c/624af2d4b5e9d3dd366538e4fb4a2a037792a7e3"},{"url":"https://git.kernel.org/stable/c/ffc8eec06378a340d708c889184ab3e14b57d540"}],"tags":["cve.org"],"epss":0.00173,"epssPercentile":0.06401,"ingestedAt":"2026-10-21T12:48:53.603Z","slug":"CVE-2026-68211","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nmedia: stm32-dcmipp: Return queued buffers on start_streaming() failure\n\nThe vb2 framework hands buffers to the driver via buf_queue() before\ncalling start_streaming().  If start_streaming() returns an error\nwithout first returning those buffers via vb2_buffer_done(),\nvb2_start_streaming() fires WARN_ON(owned_by_drv_count) and the queued\nbuffers leak.\n\ndcmipp_bytecap_start_streaming() returned -EINVAL when the source\nsubdevice could not be resolved from the media graph, before\npm_runtime_resume_and_get() and media_pipeline_start() had been called.\nThe remaining error paths already converge on the err_buffer_done\nlabel, which calls dcmipp_bytecap_all_buffers_done(...,\nVB2_BUF_STATE_QUEUED).  Jump to that label directly: the intermediate\nerr_pm_put / err_media_pipeline_stop labels are skipped, which is\ncorrect because nothing they would undo has happened yet.\n\nThis mirrors the uvcvideo fix in commit 4cf3b6fd54eb (\"media: uvcvideo:\nReturn queued buffers on start_streaming() failure\").\n\n## Affected\n\n- `Linux >= 28e0f37722965fa150af31d82101c95fd21aef60 < c1800238a60b0584b1924f11ce38ec8aba533238`\n- `Linux >= 28e0f37722965fa150af31d82101c95fd21aef60 < ed342a86bb2f9c1b44a0fc4f6b08c14073946e4f`\n- `Linux >= 28e0f37722965fa150af31d82101c95fd21aef60 < 624af2d4b5e9d3dd366538e4fb4a2a037792a7e3`\n- `Linux >= 28e0f37722965fa150af31d82101c95fd21aef60 < ffc8eec06378a340d708c889184ab3e14b57d540`\n- `Linux 6.8`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}