# CVE-2026-89866: media: chips-media: wave5: Resume device before setting EOS flag

CVE-2026-89866 is fixed in linux on 1 platform by DEBIAN-CVE-2026-89866 (version 7.2.6-1), released September 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-89866
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 16, 2026
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-89866

## 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().

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.2.6-1 | [DEBIAN-CVE-2026-89866](https://patchblox.com/security/data/fix/linux/debian-cve-2026-89866.md) | Sep 23, 2026 |

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Data as of 2026-11-09T13:31:49Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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