CVE-2026-68209

Local denial of service via leaked video buffers

Published Aug 10, 2026 · Updated Aug 10, 2026

Resource leakage in the Linux kernel sun4i-csi driver from 5.4 allows local users to exhaust resources by forcing streaming setup to fail. sun4i_csi_start_streaming() returns -EINVAL for an unmatched CSI format without passing queued buffers to vb2_buffer_done(), leaving vb2's driver-owned count nonzero. Only systems using an Allwinner sun4i-csi camera are exposed, and repeated failures can deny service as queued buffers accumulate.

CVSS severity7.8
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leakage in the Linux kernel sun4i-csi driver from 5.4 allows local users to exhaust resources by forcing streaming setup to fail. sun4i_csi_start_streaming() returns -EINVAL for an unmatched CSI format without passing queued buffers to vb2_buffer_done(), leaving vb2's driver-owned count nonzero. Only systems using an Allwinner sun4i-csi camera are exposed, and repeated failures can deny service as queued buffers accumulate.

The record

CVE
CVE-2026-68209
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-772, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.4
  2. Affected versionversion=577bbf23b758848f0c4a50d346460b690c753024 <4872161e6fbe4e1783daea8bff79caddfae0fb82
  3. Affected versionversion=577bbf23b758848f0c4a50d346460b690c753024 <668face37fdb6b6900645dc8777195498541c9a7
  4. Affected versionversion=577bbf23b758848f0c4a50d346460b690c753024 <a8abecc638a7feb20b78fabd563b05e30c071331
  5. Affected versionversion=577bbf23b758848f0c4a50d346460b690c753024 <b5184b3f0e9d4cc47059ba1138c9a73d43d2493f
  6. Affected versionversion=577bbf23b758848f0c4a50d346460b690c753024 <bbba3e260a62810a717b4442a3bb96d0ec0f6309

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.4; version=577bbf23b758848f0c4a50d346460b690c753024 <4872161e6fbe4e1783daea8bff79caddfae0fb82; version=577bbf23b758848f0c4a50d346460b690c753024 <668face37fdb6b6900645dc8777195498541c9a7; version=577bbf23b758848f0c4a50d346460b690c753024 <a8abecc638a7feb20b78fabd563b05e30c071331; version=577bbf23b758848f0c4a50d346460b690c753024 <b5184b3f0e9d4cc47059ba1138c9a73d43d2493f; version=577bbf23b758848f0c4a50d346460b690c753024 <bbba3e260a62810a717b4442a3bb96d0ec0f6309

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8cve.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-772Missing Release of Resource after Effective Lifetime
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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