CVE-2026-68209
In the Linux kernel, the following vulnerability has been resolved: media: sun4i-csi: Return queued buffers on start_streaming() failure The vb2 framework hands buffers to the driver via buf_queue() before calling start_streaming().
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.18%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: media: sun4i-csi: 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. sun4i_csi_start_streaming() returned -EINVAL when no matching CSI format could be found, before any setup (scratch buffer allocation, pipeline start) had been performed. The remaining error paths already converge on the err_clear_dma_queue label, which calls return_all_buffers(..., VB2_BUF_STATE_QUEUED) under csi->qlock. Jump to that label directly: the intermediate err_disable_device / err_disable_pipeline / err_free_scratch_buffer 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").
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.18% probability · 7th percentile
- CISA KEV
- Not listed
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/29fce7bcb3b959f6d4fdcdff7d26330152fdf98d
- https://git.kernel.org/stable/c/3c0bd793b0083fd4639ba7f60d1e7db8c8ac459a
- https://git.kernel.org/stable/c/4872161e6fbe4e1783daea8bff79caddfae0fb82
- https://git.kernel.org/stable/c/668face37fdb6b6900645dc8777195498541c9a7
- https://git.kernel.org/stable/c/7c2c30e282745a83d332c3cf92d1c0bcc491ac54
- https://git.kernel.org/stable/c/a8abecc638a7feb20b78fabd563b05e30c071331
- https://git.kernel.org/stable/c/b5184b3f0e9d4cc47059ba1138c9a73d43d2493f
- https://git.kernel.org/stable/c/bbba3e260a62810a717b4442a3bb96d0ec0f6309
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.