CVE-2026-89867 (GCVE-0-2026-89867)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:31 – Updated: 2026-09-16 10:31
VLAI
Title
media: chips-media: wave5: Defer job_finish() only when a DEC_PIC was queued
Summary
In the Linux kernel, the following vulnerability has been resolved: media: chips-media: wave5: Defer job_finish() only when a DEC_PIC was queued Decoder instances sharing a VPU also share one v4l2_m2m job slot, released when the running context calls v4l2_m2m_job_finish(). While draining, device_run() defers job_finish() once EOS is sent (sent_eos), expecting a later finish_decode() (from a DEC_PIC completion IRQ) to release the slot. But the m2m core checks job_ready() only when a job is queued, not when it is dispatched. A job queued while draining can run after finish_decode() has already moved the instance to STOP and sent EOS. device_run() then runs in STOP, issues no DEC_PIC, yet still skips job_finish() - so no IRQ, no finish_decode(), and the shared slot is leaked, stalling every instance. With several v4l2h264dec instances in parallel, GStreamer hangs at EOS. Track whether the run actually queued a DEC_PIC (cmd_issued) and defer job_finish() only then. Otherwise finish the job immediately
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a176ac5e701f1ba30843c0d7e0663a761bf9a61a , < 63d758d2f9dba836d5ae597d317cde522e817cf9 (git)
Affected: a176ac5e701f1ba30843c0d7e0663a761bf9a61a , < b694ba0a5526a69f78a6924982b1553154ccfd73 (git)
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Linux Linux Affected: 7.0
Unaffected: 0 , < 7.0 (semver)
Unaffected: 7.2.5 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
            "drivers/media/platform/chips-media/wave5/wave5-vpu-dec.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: chips-media: wave5: Defer job_finish() only when a DEC_PIC was queued\n\nDecoder instances sharing a VPU also share one v4l2_m2m job slot, released\nwhen the running context calls v4l2_m2m_job_finish(). While draining,\ndevice_run() defers job_finish() once EOS is sent (sent_eos), expecting a\nlater finish_decode() (from a DEC_PIC completion IRQ) to release the slot.\n\nBut the m2m core checks job_ready() only when a job is queued, not when it\nis dispatched. A job queued while draining can run after finish_decode()\nhas already moved the instance to STOP and sent EOS. device_run() then runs\nin STOP, issues no DEC_PIC, yet still skips job_finish() - so no IRQ, no\nfinish_decode(), and the shared slot is leaked, stalling every instance.\nWith several v4l2h264dec instances in parallel, GStreamer hangs at EOS.\n\nTrack whether the run actually queued a DEC_PIC (cmd_issued) and defer\njob_finish() only then. Otherwise finish the job immediately"
        }
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      "providerMetadata": {
        "dateUpdated": "2026-09-16T10:31:37.185Z",
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        "shortName": "Linux"
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      "title": "media: chips-media: wave5: Defer job_finish() only when a DEC_PIC was queued",
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    "datePublished": "2026-09-16T10:31:37.185Z",
    "dateReserved": "2026-09-11T19:38:34.771Z",
    "dateUpdated": "2026-09-16T10:31:37.185Z",
    "state": "PUBLISHED"
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          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: chips-media: wave5: Defer job_finish() only when a DEC_PIC was queued\n\nDecoder instances sharing a VPU also share one v4l2_m2m job slot, released\nwhen the running context calls v4l2_m2m_job_finish(). While draining,\ndevice_run() defers job_finish() once EOS is sent (sent_eos), expecting a\nlater finish_decode() (from a DEC_PIC completion IRQ) to release the slot.\n\nBut the m2m core checks job_ready() only when a job is queued, not when it\nis dispatched. A job queued while draining can run after finish_decode()\nhas already moved the instance to STOP and sent EOS. device_run() then runs\nin STOP, issues no DEC_PIC, yet still skips job_finish() - so no IRQ, no\nfinish_decode(), and the shared slot is leaked, stalling every instance.\nWith several v4l2h264dec instances in parallel, GStreamer hangs at EOS.\n\nTrack whether the run actually queued a DEC_PIC (cmd_issued) and defer\njob_finish() only then. Otherwise finish the job immediately"
          }
        ],
        "id": "CVE-2026-89867",
        "lastModified": "2026-09-16T11:16:54.843",
        "metrics": {},
        "published": "2026-09-16T11:16:54.843",
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        "vulnStatus": "Received"
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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