CVE-2026-68209
media: sun4i-csi: Return queued buffers on start_streaming() failure
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").
INFO
Published Date :
Aug. 10, 2026, 1:20 p.m.
Last Modified :
Aug. 17, 2026, 5:18 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Apply the Linux kernel patch to return buffers on failure.
- Update the kernel to the fixed version.
- Verify buffer handling logic in start_streaming().
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-68209.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-68209 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-68209
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-68209 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-68209 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '577bbf23b758848f0c4a50d346460b690c753024', 'lessThan': '4872161e6fbe4e1783daea8bff79caddfae0fb82', 'versionType': 'git'}, {'status': 'affected', 'version': '577bbf23b758848f0c4a50d346460b690c753024', 'lessThan': 'a8abecc638a7feb20b78fabd563b05e30c071331', 'versionType': 'git'}, {'status': 'affected', 'version': '577bbf23b758848f0c4a50d346460b690c753024', 'lessThan': 'b5184b3f0e9d4cc47059ba1138c9a73d43d2493f', 'versionType': 'git'}, {'status': 'affected', 'version': '577bbf23b758848f0c4a50d346460b690c753024', 'lessThan': '668face37fdb6b6900645dc8777195498541c9a7', 'versionType': 'git'}, {'status': 'affected', 'version': '577bbf23b758848f0c4a50d346460b690c753024', 'lessThan': 'bbba3e260a62810a717b4442a3bb96d0ec0f6309', 'versionType': 'git'}], 'programFiles': ['drivers/media/platform/sunxi/sun4i-csi/sun4i_dma.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.4'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.4', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/media/platform/sunxi/sun4i-csi/sun4i_dma.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '577bbf23b758848f0c4a50d346460b690c753024', 'lessThan': '4872161e6fbe4e1783daea8bff79caddfae0fb82', 'versionType': 'git'}, {'status': 'affected', 'version': '577bbf23b758848f0c4a50d346460b690c753024', 'lessThan': 'a8abecc638a7feb20b78fabd563b05e30c071331', 'versionType': 'git'}, {'status': 'affected', 'version': '577bbf23b758848f0c4a50d346460b690c753024', 'lessThan': 'b5184b3f0e9d4cc47059ba1138c9a73d43d2493f', 'versionType': 'git'}, {'status': 'affected', 'version': '577bbf23b758848f0c4a50d346460b690c753024', 'lessThan': '668face37fdb6b6900645dc8777195498541c9a7', 'versionType': 'git'}, {'status': 'affected', 'version': '577bbf23b758848f0c4a50d346460b690c753024', 'lessThan': 'bbba3e260a62810a717b4442a3bb96d0ec0f6309', 'versionType': 'git'}], 'programFiles': ['drivers/media/platform/sunxi/sun4i-csi/sun4i_dma.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.4'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.4', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/media/platform/sunxi/sun4i-csi/sun4i_dma.c'], 'defaultStatus': 'affected'}] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 13, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 10, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '577bbf23b758848f0c4a50d346460b690c753024', 'lessThan': '4872161e6fbe4e1783daea8bff79caddfae0fb82', 'versionType': 'git'}, {'status': 'affected', 'version': '577bbf23b758848f0c4a50d346460b690c753024', 'lessThan': 'a8abecc638a7feb20b78fabd563b05e30c071331', 'versionType': 'git'}, {'status': 'affected', 'version': '577bbf23b758848f0c4a50d346460b690c753024', 'lessThan': 'b5184b3f0e9d4cc47059ba1138c9a73d43d2493f', 'versionType': 'git'}, {'status': 'affected', 'version': '577bbf23b758848f0c4a50d346460b690c753024', 'lessThan': '668face37fdb6b6900645dc8777195498541c9a7', 'versionType': 'git'}, {'status': 'affected', 'version': '577bbf23b758848f0c4a50d346460b690c753024', 'lessThan': 'bbba3e260a62810a717b4442a3bb96d0ec0f6309', 'versionType': 'git'}], 'programFiles': ['drivers/media/platform/sunxi/sun4i-csi/sun4i_dma.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.4'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.4', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/media/platform/sunxi/sun4i-csi/sun4i_dma.c'], 'defaultStatus': 'affected'}] Added 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"). Added Reference https://git.kernel.org/stable/c/4872161e6fbe4e1783daea8bff79caddfae0fb82 Added Reference https://git.kernel.org/stable/c/668face37fdb6b6900645dc8777195498541c9a7 Added Reference https://git.kernel.org/stable/c/a8abecc638a7feb20b78fabd563b05e30c071331 Added Reference https://git.kernel.org/stable/c/b5184b3f0e9d4cc47059ba1138c9a73d43d2493f Added Reference https://git.kernel.org/stable/c/bbba3e260a62810a717b4442a3bb96d0ec0f6309