CVE-2026-68209media: sun4i-csi: Return queued buffers on start_streaming() failure
- 7.8HighCVSS base score
- 0.18%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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").
Timeline
ID reserved
By Linux
- 11 days later
· 11 days later
Published
- 9 days later
· 9 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.18% · top 93% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 577bbf23b758848f0c4a50d346460b690c753024 – < 29fce7bcb3b959f6d4fdcdff7d26330152fdf98d
- affected 577bbf23b758848f0c4a50d346460b690c753024 – < 7c2c30e282745a83d332c3cf92d1c0bcc491ac54
- affected 577bbf23b758848f0c4a50d346460b690c753024 – < 3c0bd793b0083fd4639ba7f60d1e7db8c8ac459a
- affected 577bbf23b758848f0c4a50d346460b690c753024 – < 4872161e6fbe4e1783daea8bff79caddfae0fb82
- affected 577bbf23b758848f0c4a50d346460b690c753024 – < a8abecc638a7feb20b78fabd563b05e30c071331
- affected 577bbf23b758848f0c4a50d346460b690c753024 – < b5184b3f0e9d4cc47059ba1138c9a73d43d2493f
- affected 577bbf23b758848f0c4a50d346460b690c753024 – < 668face37fdb6b6900645dc8777195498541c9a7
- affected 577bbf23b758848f0c4a50d346460b690c753024 – < bbba3e260a62810a717b4442a3bb96d0ec0f6309
- affected 5.4
- unaffected < 5.4
- unaffected 5.10.265 – ≤ 5.10.*
- unaffected 5.15.216 – ≤ 5.15.*
- unaffected 6.1.183 – ≤ 6.1.*
- unaffected 6.6.148 – ≤ 6.6.*
- unaffected 6.12.101 – ≤ 6.12.*
- unaffected 6.18.42 – ≤ 6.18.*
- unaffected 7.1.6 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/29fce7bcb3b959f6d4fdcdff7d26330152fdf98d (opens in a new tab)
- https://git.kernel.org/stable/c/7c2c30e282745a83d332c3cf92d1c0bcc491ac54 (opens in a new tab)
- https://git.kernel.org/stable/c/3c0bd793b0083fd4639ba7f60d1e7db8c8ac459a (opens in a new tab)
- https://git.kernel.org/stable/c/4872161e6fbe4e1783daea8bff79caddfae0fb82 (opens in a new tab)
- https://git.kernel.org/stable/c/a8abecc638a7feb20b78fabd563b05e30c071331 (opens in a new tab)
- https://git.kernel.org/stable/c/b5184b3f0e9d4cc47059ba1138c9a73d43d2493f (opens in a new tab)
- https://git.kernel.org/stable/c/668face37fdb6b6900645dc8777195498541c9a7 (opens in a new tab)
- https://git.kernel.org/stable/c/bbba3e260a62810a717b4442a3bb96d0ec0f6309 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-55310 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-68209)Record last updated .