Description
In the Linux kernel, the following vulnerability has been resolved:

media: chips-media: wave5: Resume device before setting EOS flag

Setting the EOS flag talks to the firmware via send_firmware_command(),
which accesses VPU registers. Both the STREAMOFF path
(wave5_vpu_dec_job_abort()) and the V4L2_DEC_CMD_STOP path
(wave5_vpu_dec_stop()) can run while the device is runtime suspended, so
those register accesses hit powered-down hardware and the SoC raises an
asynchronous SError, panicking the kernel:

SError Interrupt on CPU3, code 0x00000000bf000000 -- SError
send_firmware_command+0x2c/0x160 [wave5]
wave5_vpu_dec_set_bitstream_flag+0x6c/0x80 [wave5]
wave5_vpu_dec_update_bitstream_buffer+0x80/0xec [wave5]
wave5_vpu_dec_job_abort+0x44/0xa0 [wave5]
v4l2_m2m_cancel_job+0x110/0x19c [v4l2_mem2mem]
v4l2_m2m_streamoff+0x24/0x140 [v4l2_mem2mem]

Resume the device with pm_runtime_resume_and_get() around the EOS
firmware command and release it with pm_runtime_put_autosuspend(),
matching the runtime PM handling already done in
wave5_vpu_dec_device_run().
Published: 2026-09-16
Score: n/a
EPSS: < 1% Very Low
KEV: No
Impact: Kernel Panic via Runtime PM Error
Action: Immediate Patch
AI Analysis

Impact

In the Linux kernel media driver, setting the EOS flag causes a firmware command that writes to VPU registers while the device is runtime suspended. Because the hardware is powered down, the SoC raises an asynchronous SError that panics the kernel, leading to a system crash. The weakness is an improper use of runtime power management that allows register access in an invalid power state.

Affected Systems

The flaw resides in the Linux kernel's media:chips-media wave5 driver. All kernel releases that contain this driver and have not applied the recent patch are affected. The vendor is the Linux kernel community. The issue can occur on any platform that implements the wave5 driver and its VPU subsystem.

Risk and Exploitability

The EPSS score is below 1 %, indicating a very low likelihood of exploitation at present. The flaw is not yet listed in the CISA KEV catalog. Attackers would need local access to issue V4L2 commands to trigger the defect, so the risk is confined to privileged or local users. The impact is a full kernel crash, resulting in denial of service. Although a CVSS score is not provided, the severity warrants prompt remediation.

Generated by OpenCVE AI on September 18, 2026 at 08:18 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Upgrade the kernel to a patched release that contains the wave5 driver fix.
  • If an immediate kernel upgrade is not feasible, restrict access to the media device by limiting the device group or applying a file permission policy that permits only trusted users to issue V4L2 commands.
  • If neither upgrade nor permission changes can be applied promptly, blacklist the wave5 driver using modprobe configuration so that it does not load during boot.

Generated by OpenCVE AI on September 18, 2026 at 08:18 UTC.

Tracking

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Advisories

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History

Fri, 18 Sep 2026 08:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-665

Wed, 16 Sep 2026 10:45:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: media: chips-media: wave5: Resume device before setting EOS flag Setting the EOS flag talks to the firmware via send_firmware_command(), which accesses VPU registers. Both the STREAMOFF path (wave5_vpu_dec_job_abort()) and the V4L2_DEC_CMD_STOP path (wave5_vpu_dec_stop()) can run while the device is runtime suspended, so those register accesses hit powered-down hardware and the SoC raises an asynchronous SError, panicking the kernel: SError Interrupt on CPU3, code 0x00000000bf000000 -- SError send_firmware_command+0x2c/0x160 [wave5] wave5_vpu_dec_set_bitstream_flag+0x6c/0x80 [wave5] wave5_vpu_dec_update_bitstream_buffer+0x80/0xec [wave5] wave5_vpu_dec_job_abort+0x44/0xa0 [wave5] v4l2_m2m_cancel_job+0x110/0x19c [v4l2_mem2mem] v4l2_m2m_streamoff+0x24/0x140 [v4l2_mem2mem] Resume the device with pm_runtime_resume_and_get() around the EOS firmware command and release it with pm_runtime_put_autosuspend(), matching the runtime PM handling already done in wave5_vpu_dec_device_run().
Title media: chips-media: wave5: Resume device before setting EOS flag
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-09-16T10:31:36.480Z

Reserved: 2026-09-11T19:38:34.771Z

Link: CVE-2026-89866

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-16T11:16:54.743

Modified: 2026-09-16T11:16:54.743

Link: CVE-2026-89866

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-18T08:30:06Z

Weaknesses