media: stm32-dcmipp: Return queued buffers on start_streaming() failure

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Summary

CVECVE-2026-68211
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-10 13:20:08 UTC
Updated2026-08-17 05:18:23 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: media: stm32-dcmipp: Return queued buffers on start_streaming() failure The vb2 framework hands buffers to the driver via buf_queue() before calling start_streaming(). If start_streaming() returns an error without first returning those buffers via vb2_buffer_done(), vb2_start_streaming() fires WARN_ON(owned_by_drv_count) and the queued buffers leak. dcmipp_bytecap_start_streaming() returned -EINVAL when the source subdevice could not be resolved from the media graph, before pm_runtime_resume_and_get() and media_pipeline_start() had been called. The remaining error paths already converge on the err_buffer_done label, which calls dcmipp_bytecap_all_buffers_done(..., VB2_BUF_STATE_QUEUED). Jump to that label directly: the intermediate err_pm_put / err_media_pipeline_stop labels are skipped, which is correct because nothing they would undo has happened yet. This mirrors the uvcvideo fix in commit 4cf3b6fd54eb ("media: uvcvideo: Return queued buffers on start_streaming() failure").

Risk And Classification

EPSS: 0.001730000 probability, percentile 0.070540000 (date 2026-08-17)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 28e0f37722965fa150af31d82101c95fd21aef60 ed342a86bb2f9c1b44a0fc4f6b08c14073946e4f git Not specified
CNA Linux Linux affected 28e0f37722965fa150af31d82101c95fd21aef60 624af2d4b5e9d3dd366538e4fb4a2a037792a7e3 git Not specified
CNA Linux Linux affected 28e0f37722965fa150af31d82101c95fd21aef60 ffc8eec06378a340d708c889184ab3e14b57d540 git Not specified
CNA Linux Linux affected 6.8 Not specified
CNA Linux Linux unaffected 6.8 semver Not specified
CNA Linux Linux unaffected 6.18.42 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.6 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/624af2d4b5e9d3dd366538e4fb4a2a037792a7e3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ffc8eec06378a340d708c889184ab3e14b57d540 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ed342a86bb2f9c1b44a0fc4f6b08c14073946e4f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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