GHSA-93X6-MG2W-RRG6
Vulnerability from github – Published: 2026-08-10 15:33 – Updated: 2026-08-19 18:32In 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").
{
"affected": [],
"aliases": [
"CVE-2026-68209"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-10T13:20:08Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: sun4i-csi: 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\nsun4i_csi_start_streaming() returned -EINVAL when no matching CSI\nformat could be found, before any setup (scratch buffer allocation,\npipeline start) had been performed. The remaining error paths already\nconverge on the err_clear_dma_queue label, which calls\nreturn_all_buffers(..., VB2_BUF_STATE_QUEUED) under csi-\u003eqlock. Jump\nto that label directly: the intermediate err_disable_device /\nerr_disable_pipeline / err_free_scratch_buffer labels are skipped,\nwhich is correct 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\").",
"id": "GHSA-93x6-mg2w-rrg6",
"modified": "2026-08-19T18:32:11Z",
"published": "2026-08-10T15:33:41Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68209"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/29fce7bcb3b959f6d4fdcdff7d26330152fdf98d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3c0bd793b0083fd4639ba7f60d1e7db8c8ac459a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4872161e6fbe4e1783daea8bff79caddfae0fb82"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/668face37fdb6b6900645dc8777195498541c9a7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7c2c30e282745a83d332c3cf92d1c0bcc491ac54"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a8abecc638a7feb20b78fabd563b05e30c071331"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b5184b3f0e9d4cc47059ba1138c9a73d43d2493f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bbba3e260a62810a717b4442a3bb96d0ec0f6309"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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